Professional Paper 1650–G
| Scientific name from original reference | Currently accepted scientific name | Authors for currently accepted scientific name | Common name(s) | Plant family | Number of gridpoints | Original primary map, name and authority source | Unique sources | Notes | Status |
|---|---|---|---|---|---|---|---|---|---|
| Abies amabilis | Abies amabilis | Douglas ex J. Forbes | Pacific silver fir | Pinaceae | 262 | Little (1971); Viereck and Little (1975) | redigitized | ||
| Abies balsamea | Abies balsamea | (L.) Mill. | balsam fir | Pinaceae | 4944 | Little (1971) | redigitized | ||
| Abies concolor | Abies concolor | (Gordon & Glend.) Lindl. ex Hildebr. | white fir | Pinaceae | 261 | Little (1971) | redigitized | ||
| Abies fraseri | Abies fraseri | (Pursh) Poir. | Fraser fir | Pinaceae | 3 | Little (1971) | redigitized | ||
| Abies grandis | Abies grandis | (Douglas ex D. Don) Lindl. | grand fir | Pinaceae | 345 | Little (1971) | redigitized | ||
| Abies lasiocarpa | Abies lasiocarpa | (Hook.) Nutt. | subalpine fir | Pinaceae | 1851 | Little (1971); Viereck and Little (1975) | redigitized | ||
| Abies magnifica | Abies magnifica | A. Murray bis | California red fir | Pinaceae | 45 | Little (1971) | redigitized | ||
| Abies procera | Abies procera | Rehder | noble fir | Pinaceae | 48 | Little (1971) | redigitized | ||
| Acacia berlandieri | Senegalia berlandieri | (Benth.) Britton & Rose | Berlandier acacia | Fabaceae | 139 | Little (1976) | redigitized | ||
| Acacia constricta var. constricta | Vachellia constricta | (Benth.) Seigler & Ebinger | white thorn | Fabaceae | 302 | Benson and Darrow (1981) | Clarke and others (1990); Reed (1964) | Based on Reed (1964), we excluded populations shown in some sources (e.g. USDA NRCS PLANTS and BONAP) for Maryland and Virginia | new |
| Acacia farnesiana | Vachellia farnesiana var. farnesiana | sweet acacia | Fabaceae | 106 | Little (1976) | redigitized | |||
| Acacia greggii | Senegalia greggii | (A. Gray) Britton & Rose | catclaw acacia | Fabaceae | 642 | Little (1976) | redigitized | ||
| Acacia rigidula | Vachellia rigidula | (Benth.) Seigler & Ebinger | blackbrush acacia | Fabaceae | 106 | Little (1976) | redigitized | ||
| Acacia roemeriana | Senegalia roemeriana | (Scheele) Britton & Rose | Roemer acacia | Fabaceae | 126 | Little (1976) | redigitized | ||
| Acacia tortuosa | Vachellia tortuosa | (L.) Seigler & Ebinger | twisted acacia | Fabaceae | 121 | Little (1976) | redigitized | ||
| Acacia wrightii | Senegalia greggii | (A. Gray) Britton & Rose | Wright acacia | Fabaceae | 116 | Little (1976) | redigitized | ||
| Acer barbatum | Acer floridanum | (Chapm.) Pax | Florida maple | Sapindaceae | 633 | Little (1977) | redigitized | ||
| Acer circinatum | Acer circinatum | Pursh | vine maple | Sapindaceae | 345 | Little (1976) | redigitized | ||
| Acer glabrum | Acer glabrum | Torr. | Rocky Mountain maple | Sapindaceae | 1762 | Little (1976); Viereck and Little (1975) | redigitized | ||
| Acer grandidentatum | Acer grandidentatum | Nutt. | bigtooth maple | Sapindaceae | 116 | Little (1976) | redigitized | ||
| Acer leucoderme | Acer leucoderme | Small | chalk maple | Sapindaceae | 189 | Little (1977) | redigitized | ||
| Acer macrophyllum | Acer macrophyllum | Pursh | bigleaf maple | Sapindaceae | 432 | Little (1971) | redigitized | ||
| Acer negundo | Acer negundo | L. | boxelder | Sapindaceae | 6399 | Little (1971) | redigitized | ||
| Acer nigrum | Acer nigrum | F. Michx. | black maple | Sapindaceae | 1474 | Little (1971) | redigitized | ||
| Acer pensylvanicum | Acer pensylvanicum | L. | striped maple | Sapindaceae | 1117 | Little (1977) | redigitized | ||
| Acer rubrum | Acer rubrum | L. | red maple | Sapindaceae | 4828 | Little (1971) | redigitized | ||
| Acer saccharinum | Acer saccharinum | L. | silver maple | Sapindaceae | 3728 | Little (1971) | redigitized | ||
| Acer saccharum | Acer saccharum | Marshall | sugar maple | Sapindaceae | 3404 | Little (1971) | redigitized | ||
| Acer spicatum | Acer spicatum | Lam. | mountain maple | Sapindaceae | 3100 | Little (1977) | redigitized | ||
| Aesculus californica | Aesculus californica | (Spach) Nutt. | California buckeye | Sapindaceae | 101 | Little (1976) | redigitized | ||
| Aesculus glabra | Aesculus glabra | Willd. | Ohio buckeye | Sapindaceae | 1400 | Little (1971) | redigitized | ||
| Aesculus octandra | Aesculus flava | Sol. | yellow buckeye | Sapindaceae | 380 | Little (1971) | redigitized | ||
| Aesculus parviflora | Aesculus parviflora | Walter | bottlebrush buckeye | Sapindaceae | 99 | Little (1977) | redigitized | ||
| Aesculus pavia | Aesculus pavia | L. | red buckeye | Sapindaceae | 1102 | Little (1977) | redigitized | ||
| Aesculus sylvatica | Aesculus sylvatica | W. Bartram | painted buckeye | Sapindaceae | 174 | Little (1977) | redigitized | ||
| Agave deserti | Agave deserti | Engelm. | desert agave | Asparagaceae | 98 | Benson and Darrow (1981) | Gentry (1982) | new | |
| Agave lecheguilla | Agave lecheguilla | Torr. | lecheguilla | Asparagaceae | 156 | Benson and Darrow (1981) | Gentry (1982) | new | |
| Agave neomexicana | Agave parryi subsp. neomexicana | (Wooton & Standl.) B. Ullrich | New Mexico agave | Asparagaceae | 63 | Gentry (1982) | Gentry (1982) | new | |
| Agave utahensis | Agave utahensis | Engelm. | Utah agave | Asparagaceae | 22 | Benson and Darrow (1981); Calflora (2013) | Gentry (1982) | remapped | |
| Allionia incarnata | Allionia incarnata | L. | allionia | Nyctaginaceae | 1340 | eFloras (2013) | Gentry (1982) | new | |
| Alnus maritima | Alnus maritima | Muhl. ex Nutt. | seaside alder | Betulaceae | 4 | Little (1977) | redigitized | ||
| Alnus oblongifolia | Alnus oblongifolia | Torr. | Arizona alder | Betulaceae | 42 | Little (1976) | redigitized | ||
| Alnus rhombifolia | Alnus rhombifolia | Nutt. | white alder | Betulaceae | 210 | Little (1976) | redigitized | ||
| Alnus rubra | Alnus rubra | Bong. | red alder | Betulaceae | 441 | Little (1971); Viereck and Little (1975) | redigitized | ||
| Alnus rugosa | Alnus incana subsp. rugosa | (Du Roi) R.T. Clausen | speckled alder | Betulaceae | 8331 | Little (1977) | redigitized | ||
| Alnus serrulata | Alnus serrulata | (Aiton) Willd. | hazel alder | Betulaceae | 2133 | Little (1977) | redigitized | ||
| Alnus sinuata | Alnus viridis subsp. sinuata | (Regel) Á. Löve & D. Löve | Sitka alder | Betulaceae | 1646 | Little (1976); Viereck and Little (1975) | redigitized | ||
| Alnus tenuifolia | Alnus incana subsp. tenuifolia | (Nutt.) Breitung | thinleaf alder | Betulaceae | 3861 | Little (1976); Viereck and Little (1975) | redigitized | ||
| Ambrosia ambrosioides | Ambrosia ambrosioides | (Cav.) W.W. Payne | canyon ragweed | Asteraceae | 128 | Benson and Darrow (1981) | new | ||
| Ambrosia deltoidea | Ambrosia deltoidea | (Torr.) W.W. Payne | bur sage | Asteraceae | 100 | Benson and Darrow (1981) | new | ||
| Ambrosia dumosa | Ambrosia dumosa | (A. Gray) W.W. Payne | white bur sage | Asteraceae | 263 | Benson and Darrow (1981) | Raven and others (1968) | new | |
| Amelanchier alnifolia | Amelanchier alnifolia | (Nutt.) Nutt. ex M. Roem. | western serviceberry | Rosaceae | 5606 | Little (1976); Viereck and Little (1975) | redigitized | ||
| Amelanchier arborea | Amelanchier arborea | (F. Michx.) Fernald | downy serviceberry | Rosaceae | 4140 | Little (1977) | redigitized | ||
| Amelanchier interior | Amelanchier interior | E.L. Nielsen | inland serviceberry | Rosaceae | 76 | Little (1977) | redigitized | ||
| Amelanchier sanguinea | Amelanchier sanguinea | (Pursh) DC. | roundleaf serviceberry | Rosaceae | 541 | Little (1977) | redigitized | ||
| Amelanchier utahensis | Amelanchier utahensis | Koehne | Utah serviceberry | Rosaceae | 338 | Little (1976) | redigitized | ||
| Amsonia tomentosa var. stenophylla | Amsonia tomentosa var. stenophylla | Kearney & Peebles | woolly bluestar | Apocynaceae | 108 | McLaughlin (1982) | McLaughlin (1982) | new | |
| Annona glabra | Annona glabra | L. | pond-apple | Annonaceae | 51 | Little (1978) | redigitized | ||
| Aralia spinosa | Aralia spinosa | L. | devils-walkingstick | Araliaceae | 1853 | Little (1977) | redigitized | ||
| Arbutus arizonica | Arbutus arizonica | (A. Gray) Sarg. | Arizona madrone | Ericaceae | 6 | Little (1976) | redigitized | ||
| Arbutus menziesii | Arbutus menziesii | Pursh | Pacific madrone | Ericaceae | 227 | Little (1971) | redigitized | ||
| Arbutus texana | Arbutus xalapensis | Kunth | Texas madrone | Ericaceae | 15 | Little (1976) | redigitized | ||
| Arctostaphylos pringlei | Arctostaphylos pringlei | Parry | Pringle manzanita | Ericaceae | 7 | Little (1976) | redigitized | ||
| Ardisia escallonioides | Ardisia escallonioides | Schltdl. & Cham. | marlberry | Primulaceae | 49 | Little (1978) | redigitized | ||
| Artemisia arbuscula | Artemisia arbuscula | Nutt. | little sagebrush, low sagebrush, alkali sagebrush | Asteraceae | 82 | Beetle (1960) | Beetle (1960) | In accordance with eFloras, this is comprised of the three taxa mapped in Beetle (1960) (that were labeled Artemisia arbuscula subsp. arbuscula, Artemisia arbuscula subsp. thermopola, and Artemisia longiloba) | new |
| Artemisia bigelovii | Artemisia bigelovii | A. Gray | flat sagebrush, bigelow sagebrush | Asteraceae | 85 | Beetle (1960) | Beetle (1960) | new | |
| Artemisia cana | Artemisia cana | Pursh | silver sagebrush | Asteraceae | 181 | Beetle (1960) | Beetle (1960) | new | |
| Artemisia nova | Artemisia nova | A. Nelson | black sagebrush | Asteraceae | 122 | Beetle (1960) | Beetle (1960) | new | |
| Artemisia rigida | Artemisia rigida | (Nutt.) A. Gray | stiff sagebrush | Asteraceae | 24 | Beetle (1960) | Beetle (1960) | new | |
| Artemisia tridentata | Artemisia tridentata | Nutt. | big sagebrush | Asteraceae | 1895 | Little (1976); Beetle (1960) | Beetle (1960) | This geographic distribution was modified from that in Thompson and others (1999b) based on information from Little (1976), Beetle (1960), and other sources listed in Tables 3 and 4 | remapped |
| Artemisia tripartita | Artemisia tripartita | Rydb. | threetip sagebrush | Asteraceae | 37 | Beetle (1960) | Beetle (1960) | new | |
| Asimina triloba | Asimina triloba | (L.) Dunal | pawpaw | Annonaceae | 2371 | Little (1977) | redigitized | ||
| Atriplex canescens | Atriplex canescens | (Pursh) Nutt. | four-wing saltbush | Amaranthaceae | 4081 | eFloras (2013) | Sanderson and MacArthur (2004) | We followed the The Oregon Flora Project and omitted Atriplex canescens from northern Oregon, where it was mapped as present by Sanderson and McArthur (2004) | new |
| Atriplex confertifolia | Atriplex confertifolia | (Torr. & Frém.) S. Watson | shadscale | Amaranthaceae | 1842 | eFloras (2013) | new | ||
| Atriplex hymenelytra | Atriplex hymenelytra | (Torr.) S. Watson | desert holly | Amaranthaceae | 194 | Benson and Darrow (1981) | new | ||
| Atriplex parryi | Atriplex parryi | S. Watson | Parry saltbush | Amaranthaceae | 40 | Benson and Darrow (1981) | new | ||
| Atriplex polycarpa | Atriplex polycarpa | (Torr.) S. Watson | desert saltbush | Amaranthaceae | 378 | Benson and Darrow (1981) | new | ||
| Avicennia germinans | Avicennia germinans | (L.) L. | black-mangrove | Acanthaceae | 16 | Little (1977, 1978) | redigitized | ||
| Baccharis halimifolia | Baccharis halimifolia | L. | eastern baccharis | Asteraceae | 1170 | Little (1977) | redigitized | ||
| Bahiopsis reticulata | Bahiopsis reticulata | (S. Watson) E.E. Schill. & Panero | netvein goldeneye | Asteraceae | 31 | Calflora (2013); SEINet (2013) | new | ||
| Bebbia juncea | Bebbia juncea | (Benth.) Greene | bebbia | Asteraceae | 321 | Benson and Darrow (1981) | new | ||
| Berberis fremontii | Berberis fremontii | Torr. | Fremont barberry | Berberidaceae | 285 | Benson and Darrow (1981) | new | ||
| Berberis haematocarpa | Berberis haematocarpa | Wooton | red barberry, algerita | Berberidaceae | 224 | Benson and Darrow (1981) | new | ||
| Berberis trifoliolata | Berberis trifoliolata | Moric | agritos | Berberidaceae | 599 | Benson and Darrow (1981) | new | ||
| Betula alleghaniensis | Betula alleghaniensis | Britton | yellow birch | Betulaceae | 2270 | Little (1971) | redigitized | ||
| Betula lenta | Betula lenta | L. | sweet birch | Betulaceae | 757 | Little (1971) | redigitized | ||
| Betula nana | Betula nana | L. | dwarf arctic birch | Betulaceae | 6432 | Abstracted from Hultén (1968); Viereck and Little (1975) | redigitized | ||
| Betula nigra | Betula nigra | L. | river birch | Betulaceae | 2132 | Little (1971) | redigitized | ||
| Betula occidentalis | Betula occidentalis | Hook. | water birch | Betulaceae | 1091 | Little (1976) | redigitized | ||
| Betula papyrifera | Betula papyrifera | Marshall | paper birch | Betulaceae | 10090 | Little (1971); Viereck and Little (1975) | redigitized | ||
| Betula populifolia | Betula populifolia | Marshall | gray birch | Betulaceae | 639 | Little (1971) | redigitized | ||
| Brickellia atractyloides | Brickellia atractyloides | A. Gray | hollyleaf brickellbush | Asteraceae | 257 | Benson and Darrow (1981) | new | ||
| Brickellia coulteri | Brickellia coulteri | A. Gray | Coulter's brickellbush | Asteraceae | 131 | Benson and Darrow (1981) | new | ||
| Brickellia incana | Brickellia incana | A. Gray | white brickellbush | Asteraceae | 81 | Benson and Darrow (1981) | new | ||
| Brickellia laciniata | Brickellia laciniata | A. Gray | splitleaf brickellbush | Asteraceae | 234 | Benson and Darrow (1981) | new | ||
| Brickellia venosa | Brickellia venosa | (Wooton and Standl.) B.L. Rob. | veiny brickellbush | Asteraceae | 35 | Benson and Darrow (1981) | new | ||
| Buddleja utahensis | Buddleja utahensis | Coville | Panamint butterflybush | Scrophulariaceae | 51 | Benson and Darrow (1981) | new | ||
| Bumelia celastrina | Sideroxylon celastrinum | (Kunth) T.D. Penn. | saffron-plum | Sapotaceae | 69 | Little (1976, 1978) | redigitized | ||
| Bumelia lanuginosa | Sideroxylon lanuginosum | Michx. | gum bumelia | Sapotaceae | 1603 | Little (1976, 1977) | redigitized | ||
| Bumelia lycioides | Sideroxylon lycioides | L. | buckthorn bumelia | Sapotaceae | 523 | Little (1977) | redigitized | ||
| Bumelia tenax | Sideroxylon tenax | L. | tough bumelia | Sapotaceae | 50 | Little (1977) | redigitized | ||
| Bursera microphylla | Bursera microphylla | A. Gray | elephanttree | Burseraceae | 21 | Little (1976); Benson and Darrow (1981) | remapped | ||
| Bursera simaruba | Bursera simaruba | (L.) Sarg. | gumbo-limbo | Burseraceae | 24 | Little (1978) | redigitized | ||
| Caesalpinia mexicana | Caesalpinia mexicana | A. Gray | Mexican poinciana | Fabaceae | 5 | Little (1976) | redigitized | ||
| Calliandra eriophylla | Calliandra eriophylla | Benth. | fairy duster | Fabaceae | 218 | Benson and Darrow (1981) | new | ||
| Canotia holacantha | Canotia holacantha | Torr. | canotia | Celastraceae | 64 | Little (1976) | redigitized | ||
| Carnegiea gigantea | Carnegiea gigantea | (Engelm.) Britton & Rose | saguaro | Cactaceae | 64 | Turner and others (1995); SEINet (2013); Little (1976) | remapped | ||
| Carpinus caroliniana | Carpinus caroliniana | Walter | American hornbeam | Betulaceae | 3758 | Little (1971) | redigitized | ||
| Carya aquatica | Carya aquatica | (F. Michx.) Nutt. | water hickory | Juglandaceae | 987 | Little (1971) | redigitized | ||
| Carya cordiformis | Carya cordiformis | (Wangenh.) K. Koch | bitternut hickory | Juglandaceae | 3751 | Little (1971) | redigitized | ||
| Carya floridana | Carya floridana | Sarg. | scrub hickory | Juglandaceae | 43 | Little (1977) | redigitized | ||
| Carya glabra | Carya glabra | (Mill.) Sweet | pignut hickory | Juglandaceae | 2905 | Little (1971) | redigitized | ||
| Carya illinoensis | Carya illinoinensis | (Wangenh.) K. Koch | pecan | Juglandaceae | 1000 | Little (1971) | redigitized | ||
| Carya laciniosa | Carya laciniosa | (F. Michx.) Loudon | shellbark hickory | Juglandaceae | 886 | Little (1971) | redigitized | ||
| Carya myristicaeformis | Carya myristiciformis | (F. Michx.) Nutt. | nutmeg hickory | Juglandaceae | 48 | Little (1971) | redigitized | ||
| Carya ovata | Carya ovata | (Mill.) K. Koch | shagbark hickory | Juglandaceae | 3023 | Little (1971) | redigitized | ||
| Carya pallida | Carya pallida | (Ashe) Engl. & Graebn. | sand hickory | Juglandaceae | 646 | Little (1977) | redigitized | ||
| Carya texana | Carya texana | Buckley | black hickory | Juglandaceae | 649 | Little (1977) | redigitized | ||
| Carya tomentosa | Carya tomentosa | (Poir.) Nutt. | mockernut hickory | Juglandaceae | 2839 | Little (1971) | redigitized | ||
| Castanea alnifolia | Castanea pumila | (L.) Mill. | Florida chinkapin | Fagaceae | 74 | Little (1977) | redigitized | ||
| Castanea dentata | Castanea dentata | (Marshall) Borkh. | American chestnut | Fagaceae | 1158 | Little (1977) | redigitized | ||
| Castanea ozarkensis | Castanea ozarkensis | Ashe | Ozark chinkapin | Fagaceae | 85 | Little (1977) | redigitized | ||
| Castanea pumila | Castanea pumila | (L.) Mill. | Allegheny chinkapin | Fagaceae | 1340 | Little (1977) | redigitized | ||
| Castanopsis chrysophylla | Chrysolepis chrysophylla | (Douglas ex Hook.) Hjelmq. | golden chinkapin | Fagaceae | 119 | Little (1971) | redigitized | ||
| Ceanothus spinosus | Ceanothus spinosus | Nutt. | spiny ceanothus | Rhamnaceae | 5 | Little (1976) | redigitized | ||
| Ceanothus thyrsiflorus | Ceanothus thyrsiflorus | Eschsch. | blueblossom | Rhamnaceae | 45 | Little (1976) | redigitized | ||
| Celtis laevigata | Celtis laevigata | Willd. | sugarberry | Cannabaceae | 2421 | Little (1971) | redigitized | ||
| Celtis occidentalis | Celtis occidentalis | L. | hackberry | Cannabaceae | 3110 | Little (1971) | redigitized | ||
| Celtis pallida | Celtis pallida | Torr. | desert hackberry | Cannabaceae | 234 | Turner and others (1995); Benson and Darrow (1981) | new | ||
| Celtis reticulata | Celtis reticulata | Torr. | netleaf hackberry | Cannabaceae | 667 | Little (1976) | redigitized | ||
| Celtis tenuifolia | Celtis tenuifolia | Nutt. | Georgia hackberry | Cannabaceae | 648 | Little (1977) | redigitized | ||
| Cephalanthus occidentalis | Cephalanthus occidentalis | L. | common buttonbush | Rubiaceae | 4573 | Little (1976, 1977) | redigitized | ||
| Cercidium floridum | Parkinsonia florida | (Benth. ex A. Gray) S. Watson | blue paloverde | Fabaceae | 96 | Little (1976); Benson and Darrow (1981) | remapped | ||
| Cercidium macrum | Parkinsonia texana var. macra | (I.M. Johnst.) Isely | border paloverde | Fabaceae | 40 | Little (1976) | redigitized | ||
| Cercidium microphyllum | Parkinsonia microphylla | Torr. | yellow paloverde | Fabaceae | 66 | Little (1976); Benson and Darrow (1981) | remapped | ||
| Cercis canadensis | Cercis canadensis | L. | eastern redbud | Fabaceae | 3029 | Little (1976, 1977) | redigitized | ||
| Cercis occidentalis | Cercis occidentalis | Torr. ex A. Gray | California redbud | Fabaceae | 78 | Little (1976) | redigitized | ||
| Cercocarpus betuloides | Cercocarpus betuloides | Nutt. | birchleaf cercocarpus | Rosaceae | 109 | Little (1976) | redigitized | ||
| Cercocarpus breviflorus | Cercocarpus breviflorus | A. Gray | hairy cercocarpus | Rosaceae | 72 | Little (1976) | redigitized | ||
| Cercocarpus intricatus | Cercocarpus ledifolius var. intricatus | (S. Watson) M.E. Jones | littleleaf mountain-mahogany | Rosaceae | 499 | SEINet (2013) | new | ||
| Cercocarpus ledifolius | Cercocarpus ledifolius var. ledifolius | curlleaf cercocarpus | Rosaceae | 303 | Little (1976) | redigitized | |||
| Chamaebatiaria millefolium | Chamaebatiaria millefolium | (Torr.) Maxim. | desert sweet | Rosaceae | 272 | SEINet (2013); Calflora (2013); Oregon Flora Project (2013); Schultz and others (2010, Digital Atlas of the Vascular Plants of Utah) | new | ||
| Chamaecyparis lawsoniana | Chamaecyparis lawsoniana | (A. Murray) Parl. | Port-Orford-cedar | Cupressaceae | 21 | Little (1971) | redigitized | ||
| Chamaecyparis nootkatensis | Callitropsis nootkatensis | (D. Don) Florin | Alaska-cedar | Cupressaceae | 310 | Little (1971); Viereck and Little (1975) | redigitized | ||
| Chamaecyparis thyoides | Chamaecyparis thyoides | (L.) Britton, Sterns & Poggenb. | Atlantic white-cedar | Cupressaceae | 208 | Little (1971) | redigitized | ||
| Chilopsis linearis | Chilopsis linearis | (Cav.) Sweet | desert-willow | Bignoniaceae | 536 | Little (1976) | redigitized | ||
| Chionanthus virginicus | Chionanthus virginicus | L. | fringetree | Oleaceae | 1311 | Little (1977) | redigitized | ||
| Chrysobalanus icaco | Chrysobalanus icaco | L. | cocoplum | Chrysobalanaceae | 40 | Little (1978) | redigitized | ||
| Chrysophyllum oliviforme | Chrysophyllum oliviforme | L. | satinleaf | Sapotaceae | 37 | Little (1978) | redigitized | ||
| Chrysothamnus albidus | Ericameria albida | (M.E. Jones ex A. Gray) L.C. Anderson | alkali rabbitbrush | Asteraceae | 225 | Anderson (1986) | Anderson (1986) | new | |
| Chrysothamnus depressus | Chrysothamnus depressus | Nutt. | dwarf rabbitbrush | Asteraceae | 638 | Anderson (1986) | Anderson (1986) | new | |
| Chrysothamnus gramineus | Cuniculotinus gramineus | (H.M. Hall) Urbatsch, R.P. Roberts & Neubig | Charleston rabbitbrush | Asteraceae | 7 | Anderson (1986) | Anderson (1986) | new | |
| Chrysothamnus greenei | Chrysothamnus greenei | (A. Gray) Greene | Greene's rabbitbrush | Asteraceae | 585 | Anderson (1986) | Anderson (1986) | new | |
| Chrysothamnus humilis | Chrysothamnus humilis | Greene | low rabbitbrush | Asteraceae | 109 | Anderson (1986) | Anderson (1986) | new | |
| Chrysothamnus linifolius | Lorandersonia linifolia | (Greene) Urbatsch, R.P. Roberts & Neubig | spear-leaf rabbitbrush | Asteraceae | 277 | Anderson (1986) | Anderson (1986) | new | |
| Chrysothamnus molestus | Chrysothamnus molestus | (S.F. Blake) L.C. Anderson | Arizona rabbitbrush | Asteraceae | 2 | Anderson (1986) | Anderson (1986) | new | |
| Chrysothamnus nauseosus | Ericameria nauseosa | (Pall. ex Pursh) G.L. Nesom & G.I. Baird | gray rabbitbrush | Asteraceae | 3355 | Anderson (1986) | Anderson (1986) | This is a composite map composed of all of the 22 subspecies of C. nauseosus mapped by Anderson (1986) | new |
| Chrysothamnus paniculatus | Ericameria paniculata | (A. Gray) Rydb. | desert rabbitbrush | Asteraceae | 168 | Anderson (1986) | Anderson (1986) | new | |
| Chrysothamnus parryi | Ericameria parryi | (A. Gray) G.L. Nesom & G.I. Baird | Parry's rabbitbrush | Asteraceae | 611 | Anderson (1986) | Anderson (1986) | This is a composite map composed of all of the 12 subspecies of C. parryi mapped by Anderson (1986) | new |
| Chrysothamnus pulchellus ssp. baileyi | Lorandersonia baileyi | (Wooton & Standl.) Urbatsch, R.P. Roberts & Neubig | Bailey's rabbitbrush | Asteraceae | 420 | Anderson (1986) | Anderson (1986) | The two subspecies of C. pulchellus mapped by Anderson (1986) were not combined to a single C. pulchellus map because C. pulchellus ssp. baileyi is now considered to be in a different genus (as Lorandersonia baileyi) | new |
| Chrysothamnus pulchellus ssp. pulchellus | Lorandersonia pulchella | (A. Gray) Urbatsch, R.P. Roberts & Neubig | southwestern rabbitbrush | Asteraceae | 5 | Anderson (1986) | Anderson (1986) | The two subspecies of C. pulchellus mapped by Anderson (1986) were not combined to a single C. pulchellus map because C. pulchellus ssp. baileyi is now considered to be in a different genus (as Lorandersonia baileyi) | new |
| Chrysothamnus spathulatus | Lorandersonia spathulata | (L.C. Anderson) Urbatsch, R.P. Roberts & Neubig | Guadalupe rabbitbrush | Asteraceae | 25 | Anderson (1986) | Anderson (1986) | new | |
| Chrysothamnus teretifolius | Ericameria teretifolia | (Durand & Hilg.) Jeps. | green rabbitbrush | Asteraceae | 165 | Anderson (1986) | Anderson (1986) | new | |
| Chrysothamnus vaseyi | Chrysothamnus vaseyi | (A. Gray) Greene | Vasey's rabbitbrush | Asteraceae | 143 | Anderson (1986) | Anderson (1986) | new | |
| Chrysothamnus viscidiflorus | Chrysothamnus viscidiflorus | (Hook.) Nutt | Douglas rabbitbrush | Asteraceae | 2098 | Anderson (1986) | Anderson (1986) | This is a composite map of the five subspecies of C. viscidiflorus mapped by Anderson (1986) | new |
| Citharexylum berlandieri | Citharexylum berlandieri | B.L. Rob. | Berlandier fiddlewood | Verbenaceae | 3 | Little (1976) | redigitized | ||
| Cladrastis kentukea | Cladrastis kentukea | (Dum. Cours.) Rudd | yellowwood | Fabaceae | 74 | Little (1977) | redigitized | ||
| Clethra acuminata | Clethra acuminata | Michx. | cinnamon clethra | Clethraceae | 73 | Little (1977) | redigitized | ||
| Cliftonia monophylla | Cliftonia monophylla | (Lam.) Britton ex Sarg. | buckwheat-tree | Cyrillaceae | 154 | Little (1977) | redigitized | ||
| Coccoloba diversifolia | Coccoloba diversifolia | Jacq. | pigeon-plum | Polygonaceae | 9 | Little (1978) | redigitized | ||
| Coccoloba uvifera | Coccoloba uvifera | (L.) L. | seagrape | Polygonaceae | 4 | Little (1978) | redigitized | ||
| Coleogyne ramosissima | Coleogyne ramosissima | Torr. | blackbrush | Rosaceae | 241 | Benson and Darrow (1981) | new | ||
| Condalia ericoides | Condalia ericoides | (A. Gray) M.C. Johnst. | javelina bush | Rhamnaceae | 205 | Benson and Darrow (1981) | new | ||
| Condalia globosa | Condalia globosa | I.M. Johnst. | bitter condalia | Rhamnaceae | 9 | Little (1976) | redigitized | ||
| Condalia hookeri | Condalia hookeri | M.C. Johnst. | bluewood | Rhamnaceae | 183 | Little (1976) | redigitized | ||
| Condalia warnockii | Condalia warnockii | M.C. Johnst. | Mexican crucillo | Rhamnaceae | 177 | Benson and Darrow (1981) | new | ||
| Conocarpus erectus | Conocarpus erectus | L. | button-mangrove | Combretaceae | 7 | Little (1978) | redigitized | ||
| Cordia boissieri | Cordia boissieri | A. DC. | anacahuita | Boraginaceae | 13 | Little (1976) | redigitized | ||
| Cornus alternifolia | Cornus alternifolia | L. f. | alternate-leaf dogwood | Cornaceae | 2525 | Little (1977) | redigitized | ||
| Cornus drummondii | Cornus drummondii | C.A. Mey. | roughleaf dogwood | Cornaceae | 1664 | Little (1977) | redigitized | ||
| Cornus florida | Cornus florida | L. | flowering dogwood | Cornaceae | 2910 | Little (1971) | redigitized | ||
| Cornus glabrata | Cornus glabrata | Benth. | brown dogwood | Cornaceae | 58 | Little (1976) | redigitized | ||
| Cornus nuttallii | Cornus nuttallii | Audubon | Pacific dogwood | Cornaceae | 375 | Little (1976) | redigitized | ||
| Cornus occidentalis | Cornus sericea ssp. occidentalis | (Torr. & Gray) Fosberg | western dogwood | Cornaceae | 238 | Little (1976) | redigitized | ||
| Cornus racemosa | Cornus racemosa | Lam. | gray dogwood | Cornaceae | 1612 | Little (1977) | redigitized | ||
| Cornus rugosa | Cornus rugosa | Lam. | roundleaf dogwood | Cornaceae | 1492 | Little (1977) | redigitized | ||
| Cornus sessilis | Cornus sessilis | Torr. ex Durand | blackfruit dogwood | Cornaceae | 40 | Little (1976) | redigitized | ||
| Cornus stolonifera | Cornus sericea ssp. sericea | red-osier dogwood | Cornaceae | 10075 | Little (1977); Viereck and Little (1975) | redigitized | |||
| Cornus stricta | Cornus foemina | P. Mill. | stiffcornel dogwood | Cornaceae | 1037 | Little (1977) | redigitized | ||
| Corylus cornuta | Corylus cornuta | Marshall | beaked hazel | Betulaceae | 3700 | Little (1977) | redigitized | ||
| Cotinus obovatus | Cotinus obovatus | Raf. | American smoketree | Anacardiaceae | 43 | Little (1977) | redigitized | ||
| Cowania mexicana | Purshia mexicana | (D. Don) S.L. Welsh | cliffrose | Rosaceae | 397 | Little (1976) | redigitized | ||
| Crataegus columbiana | Crataegus chrysocarpa var. piperi / Crataegus williamsii | (Britton) Kruschke / Eggl. | Columbia hawthorn | Rosaceae | 67 | Little (1976) | redigitized | ||
| Crataegus douglasii | Crataegus douglasii / Crataegus rivularis | Lindl. / Nutt. | black hawthorn | Rosaceae | 1343 | Little (1976) | redigitized | ||
| Crataegus erythropoda | Crataegus erythropoda | Ashe | Cerro hawthorn | Rosaceae | 24 | Little (1976) | redigitized | ||
| Crataegus saligna | Crataegus saligna | Greene | willow hawthorn | Rosaceae | 10 | Little (1976) | redigitized | ||
| Crataegus tracyi | Crataegus tracyi | Ashe ex Eggl. | Tracy hawthorn | Rosaceae | 13 | Little (1976) | redigitized | ||
| Crossosoma bigelovii | Crossosoma bigelovii | S. Watson | ragged rockflower | Crossosomataceae | 206 | Benson and Darrow (1981) | new | ||
| Cupressus arizonica | Hesperocyparis arizonica / Hesperocyparis glabra / Hesperocyparis stephensonii | (Greene) Bartel / (Sudw.) Bartel / (C.B. Wolf) Bartel | Arizona cypress | Cupressaceae | 5 | Little (1971) | redigitized | ||
| Cupressus macnabiana | Hesperocyparis macnabiana | (A. Murray bis) Bartel | MacNab cypress | Cupressaceae | 4 | Little (1971) | redigitized | ||
| Cupressus sargentii | Hesperocyparis sargentii | (Jeps.) Bartel | Sargent cypress | Cupressaceae | 5 | Little (1971) | redigitized | ||
| Cylindropuntia acanthocarpa | Cylindropuntia acanthocarpa | (Engelm. & J.M. Bigelow) F.M. Knuth | buckhorn cholla | Cactaceae | 253 | eFloras (2013); SEINet (2013); Benson (1982) | Benson (1969, 1982); Pinkava (1999) | We follow eFloras and Tropicos in recognizing Cylindropuntia as a valid genus (ITIS follows eariler usage and places it within the genus Opuntia) | new |
| Cylindropuntia bigelovii | Cylindropuntia bigelovii | (Engelm.) F.M. Knuth | teddy-bear cholla | Cactaceae | 143 | eFloras (2013); Benson (1982); Turner and others (1995) | Benson (1969, 1982); Pinkava (1999) | We follow eFloras and Tropicos in recognizing Cylindropuntia as a valid genus (ITIS follows eariler usage and places it within the genus Opuntia) | new |
| Cylindropuntia echinocarpa | Cylindropuntia echinocarpa | (Engelm. & J.M. Bigelow) F.M. Knuth | silver or golden cholla | Cactaceae | 144 | eFloras (2013); Benson (1982); Calflora (2013); SEINet (2013) | Benson (1969, 1982); Pinkava (1999) | We follow eFloras and Tropicos in recognizing Cylindropuntia as a valid genus (ITIS follows eariler usage and places it within the genus Opuntia) | new |
| Cylindropuntia fulgida | Cylindropuntia fulgida | (Engelm.) F.M. Knuth | jumping cholla | Cactaceae | 59 | Little (1976); eFloras (2013, name change only) | The distribution of this taxon is unchanged from earlier volumes, but the genus name was changed to align with other related species included in this volume. We follow eFloras and Tropicos in recognizing Cylindropuntia as a valid genus (ITIS follows eariler usage and places it within the genus Opuntia) | redigitized | |
| Cylindropuntia ganderi | Cylindropuntia ganderi | (C.B. Wolf) Rebman & Pinkava | Gander's buckhorn cholla | Cactaceae | 6 | Calflora (2013) | Benson (1969, 1982); Pinkava (1999) | We follow eFloras and Tropicos in recognizing Cylindropuntia as a valid genus (ITIS follows eariler usage and places it within the genus Opuntia) | new |
| Cylindropuntia imbricata | Cylindropuntia imbricata | (Haw.) F.M. Knuth | tree cholla | Cactaceae | 731 | eFloras (2013); Benson (1982) | Benson (1969, 1982); Pinkava (1999) | We follow eFloras and Tropicos in recognizing Cylindropuntia as a valid genus (ITIS follows eariler usage and places it within the genus Opuntia) | new |
| Cylindropuntia whipplei | Cylindropuntia whipplei | (Engelm. & J.M. Bigelow) F.M. Knuth | Whipple cholla | Cactaceae | 317 | eFloras (2013); Benson (1982) | Benson (1969, 1982); Pinkava (1999) | We follow eFloras and Tropicos in recognizing Cylindropuntia as a valid genus (ITIS follows eariler usage and places it within the genus Opuntia) | new |
| Cyphomeris gypsophiloides | Cyphomeris gypsophiloides | (M. Martens & Galeotti) Standl. | red cyphomeris | Nyctaginaceae | 211 | eFloras (2013) | new | ||
| Cyrilla racemiflora | Cyrilla racemiflora | L. | swamp cyrilla | Cyrillaceae | 554 | Little (1977) | redigitized | ||
| Dalea mollis | Dalea mollis | Benth. | hairy prairie clover | Fabaceae | 170 | SEINet (2013); Calflora (2013) | new | ||
| Dalea spinosa | Psorothamnus spinosus | (A. Gray) Barneby | smokethorn | Fabaceae | 101 | Little (1976) | redigitized | ||
| Dasylirion leiophyllum | Dasylirion leiophyllum | Engelm. ex Trel. | green sotol | Asparagaceae | 55 | Benson and Darrow (1981) | new | ||
| Dasylirion wheeleri | Dasylirion wheeleri | S. Watson ex Rothr. | sotol | Asparagaceae | 122 | Benson and Darrow (1981) | new | ||
| Diospyros texana | Diospyros texana | Scheele | Texas persimmon | Ebenaceae | 301 | Little (1976) | redigitized | ||
| Diospyros virginiana | Diospyros virginiana | L. | common persimmon | Ebenaceae | 2870 | Little (1971) | redigitized | ||
| Ditaxis lanceolata | Ditaxis lanceolata | (Benth.) Pax & K. Hoffm. | narrowleaf silverbush | Euphorbiaceae | 131 | SEINet (2013) | new | ||
| Dithyrea californica | Dithyrea californica | Harv. | California shieldpod | Brassicaceae | 165 | SEINet (2013); Calflora (2013) | new | ||
| Dodonaea viscosa | Dodonaea viscosa | Jacq. | hopbush | Sapindaceae | 27 | Little (1976, 1978) | redigitized | ||
| Echinocactus polycephalus | Echinocactus polycephalus | Engelm. & J.M. Bigelow | cottontop cactus | Cactaceae | 139 | Benson (1982) | Benson (1969, 1982) | new | |
| Ehretia anacua | Ehretia anacua | (Terán & Berland.) I.M. Johnst. | anaqua | Boraginaceae | 49 | Little (1976) | redigitized | ||
| Elliottia racemosa | Elliottia racemosa | Muhl. ex Elliott | elliottia | Ericaceae | 3 | Little (1977) | redigitized | ||
| Encelia farinosa | Encelia farinosa | A. Gray ex Torr. | brittle bush | Asteraceae | 324 | Benson and Darrow (1981) | new | ||
| Encelia frutescens | Encelia frutescens | (A. Gray) A. Gray | green brittle bush | Asteraceae | 425 | Benson and Darrow (1981) | We treated Encelia frutescens in the sense used by Benson and Darrow (1981), which includes taxa today considered as separate species: E. frutescens, E. actonii, E. virginensis, and E. resinifera | new | |
| Ephedra nevadensis var. aspera | Ephedra aspera | Engelm. ex S. Watson | boundary ephedra | Ephedraceae | 492 | Benson and Darrow (1981) | new | ||
| Ephedra nevadensis var. nevadensis | Ephedra nevadensis | S. Watson | Nevada jointfir | Ephedraceae | 559 | Benson and Darrow (1981) | new | ||
| Ephedra torreyana | Ephedra torreyana | S. Watson | Torrey ephedra | Ephedraceae | 685 | Benson and Darrow (1981) | new | ||
| Ephedra trifurca | Ephedra trifurca | Torr. ex S. Watson | Mexican tea | Ephedraceae | 385 | Benson and Darrow (1981) | new | ||
| Ephedra viridis | Ephedra viridis | Coville | green ephedra | Ephedraceae | 915 | Benson and Darrow (1981) | new | ||
| Eriogonum fasciculatum | Eriogonum fasciculatum | Benth. | Eastern Mojave buckwheat | Polygonaceae | 432 | Benson and Darrow (1981) | new | ||
| Erythrina flabelliformis | Erythrina flabelliformis | Kearney | southwestern coralbean | Fabaceae | 11 | Little (1976) | redigitized | ||
| Erythrina herbacea | Erythrina herbacea | L. | eastern coralbean | Fabaceae | 422 | Little (1977) | redigitized | ||
| Eucnide urens | Eucnide urens | (Parry ex Gray) Parry | desert rocknettle | Loasaceae | 84 | SEINet (2013); Calflora (2013) | new | ||
| Eugenia axillaris | Eugenia axillaris | (Sw.) Willd. | white stopper | Myrtaceae | 43 | Little (1978) | redigitized | ||
| Eugenia foetida | Eugenia foetida | Pers. | boxleaf stopper | Myrtaceae | 24 | Little (1978) | redigitized | ||
| Euonymus atropurpureus | Euonymus atropurpureus | Jacq. | eastern wahoo | Celastraceae | 1617 | Little (1977) | redigitized | ||
| Euonymus occidentalis | Euonymus occidentalis | Nutt. ex Torr. | western wahoo | Celastraceae | 90 | Little (1976) | redigitized | ||
| Eysenhardtia polystachya | Eysenhardtia polystachya | (Ortega) Sarg. | kidneywood | Fabaceae | 11 | Little (1976) | redigitized | ||
| Eysenhardtia texana | Eysenhardtia texana | Scheele | Texas kidneywood | Fabaceae | 229 | Little (1976) | redigitized | ||
| Fagus grandifolia | Fagus grandifolia | Ehrh. | American beech | Fagaceae | 3364 | Little (1971) | redigitized | ||
| Fallugia paradoxa | Fallugia paradoxa | (D. Don) Endl. ex Torr. | Apache plume | Rosaceae | 891 | Benson and Darrow (1981) | new | ||
| Ferocactus covillei | Ferocactus emoryi | (Engelm.) Orcutt | Emory barrel cactus | Cactaceae | 37 | Benson (1982) | Benson (1969, 1982) | new | |
| Ferocactus cylindraceus | Ferocactus cylindraceus | (Engelm.) Orcutt | California barrel cactus | Cactaceae | 241 | Turner and others (1995); Benson (1982) | Benson (1969, 1982); Clover and Jotter (1941) | Clover and Jotter (1941) was consulted for the distribution within the Grand Canyon | new |
| Ferocactus wislizeni | Ferocactus wislizeni | (Engelm.) Britton & J.N. Rose | candy barrel cactus | Cactaceae | 164 | Benson (1982) | Benson (1969, 1982) | new | |
| Ficus aurea | Ficus aurea | Nutt. | Florida strangler fig | Moraceae | 60 | Little (1978) | redigitized | ||
| Flourensia cernua | Flourensia cernua | DC. | tar bush | Asteraceae | 250 | Benson and Darrow (1981) | new | ||
| Forestiera acuminata | Forestiera acuminata | (Michx.) Poir. | swamp-privet | Oleaceae | 576 | Little (1977) | redigitized | ||
| Forestiera angustifolia | Forestiera angustifolia | Torr. | Texas forestiera | Oleaceae | 174 | Little (1976) | redigitized | ||
| Forestiera phillyreoides | Forestiera shrevei | Standl. | desert-olive forestiera | Oleaceae | 5 | Little (1976) | redigitized | ||
| Forestiera segregata | Forestiera segregata | (Jacq.) Krug & Urb. | Florida-privet | Oleaceae | 47 | Little (1977) | redigitized | ||
| Fouquieria splendens | Fouquieria splendens | Engelm. | ocotillo | Fouquieriaceae | 534 | Benson and Darrow (1981) | new | ||
| Fraxinus americana | Fraxinus americana | L. | white ash | Oleaceae | 4264 | Little (1971) | redigitized | ||
| Fraxinus anomala | Fraxinus anomala | Torr. ex S. Watson | singleleaf ash | Oleaceae | 259 | Little (1976); Benson and Darrow (1981); SEINet (2013) | remapped | ||
| Fraxinus berlandieriana | Fraxinus berlandieriana | A. DC. | Berlandier ash | Oleaceae | 104 | Little (1976) | redigitized | ||
| Fraxinus caroliniana | Fraxinus caroliniana | Mill. | Carolina ash | Oleaceae | 661 | Little (1977) | redigitized | ||
| Fraxinus cuspidata | Fraxinus cuspidata | Torr. | fragrant ash | Oleaceae | 7 | Little (1976) | redigitized | ||
| Fraxinus dipetala | Fraxinus dipetala | Hook. & Arn. | two-petal ash | Oleaceae | 65 | Little (1976) | redigitized | ||
| Fraxinus greggii | Fraxinus greggii | A. Gray | Gregg ash | Oleaceae | 14 | Little (1976) | redigitized | ||
| Fraxinus latifolia | Fraxinus latifolia | Benth. | Oregon ash | Oleaceae | 227 | Little (1971) | redigitized | ||
| Fraxinus nigra | Fraxinus nigra | Marshall | black ash | Oleaceae | 2923 | Little (1971) | redigitized | ||
| Fraxinus pennsylvanica | Fraxinus pennsylvanica | Marshall | green ash | Oleaceae | 7310 | Little (1971) | redigitized | ||
| Fraxinus profunda | Fraxinus profunda | (Bush) Bush | pumpkin ash | Oleaceae | 246 | Little (1977) | redigitized | ||
| Fraxinus quadrangulata | Fraxinus quadrangulata | Michx. | blue ash | Oleaceae | 516 | Little (1971) | redigitized | ||
| Fraxinus texensis | Fraxinus texensis | (A. Gray) Sarg. | Texas ash | Oleaceae | 38 | Little (1976) | redigitized | ||
| Fraxinus velutina | Fraxinus velutina | Torr. | velvet ash | Oleaceae | 119 | Little (1976) | redigitized | ||
| Fremontodendron californicum | Fremontodendron californicum | (Torr.) Coville | California fremontia | Malvaceae | 58 | Little (1976) | redigitized | ||
| Garrya elliptica | Garrya elliptica | Douglas ex Lindl. | wavyleaf silktassel | Garryaceae | 53 | Little (1976) | redigitized | ||
| Gleditsia aquatica | Gleditsia aquatica | Marshall | waterlocust | Fabaceae | 431 | Little (1977) | redigitized | ||
| Gleditsia triacanthos | Gleditsia triacanthos | L. | honeylocust | Fabaceae | 2594 | Little (1971) | redigitized | ||
| Glossopetalon spinescens var. aridum | Glossopetalon spinescens var. aridum | M.E. Jones | Nevada greasebush | Crossosomataceae | 547 | Benson and Darrow (1981) | new | ||
| Glossopetalon spinescens var. spinescens | Glossopetalon spinescens var. spinescens | spiny greasebush | Crossosomataceae | 15 | Benson and Darrow (1981) | new | |||
| Gordonia lasianthus | Gordonia lasianthus | (L.) J. Ellis | loblolly-bay | Theaceae | 337 | Little (1977) | redigitized | ||
| Guaiacum angustifolium | Guaiacum angustifolium | Engelm. | Texas lignumvitae | Zygophyllaceae | 153 | Little (1976) | redigitized | ||
| Guapira discolor | Guapira discolor | (Spreng.) Little | blolly | Nyctaginaceae | 3 | Little (1978) | redigitized | ||
| Gutierrezia microcephala | Gutierrezia microcephala | (DC.) A. Gray | threadleaf snakeweed | Asteraceae | 940 | Benson and Darrow (1981) | new | ||
| Gymnocladus dioicus | Gymnocladus dioicus | (L.) K. Koch | Kentucky coffeetree | Fabaceae | 1071 | Little (1977) | redigitized | ||
| Halesia carolina | Halesia carolina | L. | Carolina silverbell | Styracaceae | 309 | Little (1977) | redigitized | ||
| Halesia diptera | Halesia diptera | J. Ellis | two-wing silverbell | Styracaceae | 322 | Little (1977) | redigitized | ||
| Halesia parviflora | Halesia carolina | L. | little silverbell | Styracaceae | 32 | Little (1977) | redigitized | ||
| Hamamelis virginiana | Hamamelis virginiana | L. | witch-hazel | Hamamelidaceae | 2834 | Little (1977) | redigitized | ||
| Hamelia patens | Hamelia patens | Jacq. | scarletbush | Rubiaceae | 74 | Little (1978) | redigitized | ||
| Haplopappus cooperi | Ericameria cooperi | (A. Gray) H.M. Hall | Cooper's goldenbush | Asteraceae | 83 | Benson and Darrow (1981) | new | ||
| Haplopappus cuneatus | Ericameria cuneata | (A. Gray) McClatchie | wedgeleaf golden weed | Asteraceae | 116 | Benson and Darrow (1981) | new | ||
| Haplopappus laricifolius | Ericameria laricifolia | (A. Gray) Shinners | turpentine bush | Asteraceae | 276 | Benson and Darrow (1981) | new | ||
| Haplopappus tenuisectus | Isocoma tenuisecta | Greene | burro weed | Asteraceae | 94 | Benson and Darrow (1981) | new | ||
| Hazardia brickellioides | Hazardia brickellioides | (S.F. Blake) W.D. Clark | brickellbush goldenweed | Asteraceae | 26 | Calflora (2013) | new | ||
| Helietta parvifolia | Helietta parvifolia | (A. Gray) Benth. | barreta | Rutaceae | 7 | Little (1976) | redigitized | ||
| Hesperoyucca newberryi | Hesperoyucca newberryi | (McKelvey) Clary | Newberry's yucca | Asparagaceae | 10 | eFloras (2013) | Haines (1941) | new | |
| Hesperoyucca whipplei | Hesperoyucca whipplei | (Torr.) Baker | chaparral yucca | Asparagaceae | 105 | eFloras (2013) | Haines (1941); Wells and Woodcock (1985) | new | |
| Holacantha emoryi | Castela emoryi | (Gray) Moran & Felger | holacantha | Simaroubaceae | 124 | Little (1976) | redigitized | ||
| Hymenoclea salsola | Ambrosia salsola | (Torr. & A. Gray) Strother & B.G. Baldwin | burrobrush | Asteraceae | 418 | Benson and Darrow (1981) | Peterson and Payne (1973) | new | |
| Hyptis emoryi | Hyptis emoryi | Torr. | desert lavender | Lamiaceae | 226 | Benson and Darrow (1981) | new | ||
| Ilex ambigua | Ilex ambigua | (Michx.) Torr. | Carolina holly | Aquifoliaceae | 674 | Little (1977) | redigitized | ||
| Ilex amelanchier | Ilex amelanchier | M.A. Curtis ex Chapm. | sarvis holly | Aquifoliaceae | 27 | Little (1977) | redigitized | ||
| Ilex cassine | Ilex cassine | L. | dahoon | Aquifoliaceae | 244 | Little (1977) | redigitized | ||
| Ilex coriacea | Ilex coriacea | (Pursh) Chapm. | large gallberry | Aquifoliaceae | 430 | Little (1977) | redigitized | ||
| Ilex decidua | Ilex decidua | Walter | possumhaw | Aquifoliaceae | 1846 | Little (1977) | redigitized | ||
| Ilex laevigata | Ilex laevigata | (Pursh) A. Gray | smooth winterberry | Aquifoliaceae | 170 | Little (1977) | redigitized | ||
| Ilex montana | Ilex montana | Torr. & A. Gray | mountain winterberry | Aquifoliaceae | 382 | Little (1977) | redigitized | ||
| Ilex myrtifolia | Ilex myrtifolia | Walter | myrtle dahoon | Aquifoliaceae | 279 | Little (1977) | redigitized | ||
| Ilex opaca | Ilex opaca | Aiton | American holly | Aquifoliaceae | 1839 | Little (1971) | redigitized | ||
| Ilex verticillata | Ilex verticillata | (L.) A. Gray | common winterberry | Aquifoliaceae | 2791 | Little (1977) | redigitized | ||
| Ilex vomitoria | Ilex vomitoria | Aiton | yaupon | Aquifoliaceae | 629 | Little (1977) | redigitized | ||
| Illicium floridanum | Illicium floridanum | J. Ellis | Florida anise-tree | Schisandraceae | 156 | Little (1977) | redigitized | ||
| Illicium parviflorum | Illicium parviflorum | Michx. ex Vent. | yellow anise-tree | Schisandraceae | 11 | Little (1977) | redigitized | ||
| Janusia gracilis | Cottsia gracilis | (A. Gray) W.R. Anderson & C. Davis | slender janusia | Malpighiaceae | 411 | Benson and Darrow (1981) | new | ||
| Jatropha cardiophylla | Jatropha cardiophylla | (Torr.) Müll. Arg. | limberbush | Euphorbiaceae | 33 | Benson and Darrow (1981) | new | ||
| Jatropha cuneata | Jatropha cuneata | Wiggins & Rollins | limberbush | Euphorbiaceae | 5 | Turner and others (1995) | new | ||
| Juglans californica | Juglans californica | S. Watson | California walnut | Juglandaceae | 10 | Little (1976) | redigitized | ||
| Juglans cinerea | Juglans cinerea | L. | butternut | Juglandaceae | 2166 | Little (1971) | redigitized | ||
| Juglans major | Juglans major | (Torr.) A. Heller | Arizona walnut | Juglandaceae | 83 | Little (1976) | redigitized | ||
| Juglans microcarpa | Juglans microcarpa | Berland. | little walnut | Juglandaceae | 50 | Little (1976) | redigitized | ||
| Juglans nigra | Juglans nigra | L. | black walnut | Juglandaceae | 3455 | Little (1971) | redigitized | ||
| Juniperus ashei | Juniperus ashei | J. Buchholz | Ashe juniper | Cupressaceae | 66 | Little (1971) | redigitized | ||
| Juniperus californica | Juniperus californica | Carrière | California juniper | Cupressaceae | 125 | Little (1971); Calflora (2013) | remapped | ||
| Juniperus communis | Juniperus communis | L. | common juniper | Cupressaceae | 11395 | Little (1971); Viereck and Little (1975) | redigitized | ||
| Juniperus deppeana | Juniperus deppeana | Steud. | alligator juniper | Cupressaceae | 80 | Little (1971) | redigitized | ||
| Juniperus erythrocarpa | Juniperus coahuilensis | (Martínez) Gaussen ex R.P. Adams | redberry juniper | Cupressaceae | 34 | Little (1981) | redigitized | ||
| Juniperus horizontalis | Juniperus horizontalis | Moench | creeping juniper | Cupressaceae | 7285 | Little (1971); Viereck and Little (1975) | redigitized | ||
| Juniperus monosperma | Juniperus monosperma | (Engelm.) Sarg. | one-seed juniper | Cupressaceae | 212 | Little (1971) | redigitized | ||
| Juniperus occidentalis | Juniperus occidentalis | Hook. | western juniper | Cupressaceae | 165 | Little (1971) | redigitized | ||
| Juniperus osteosperma | Juniperus osteosperma | (Torr.) Little | Utah juniper | Cupressaceae | 415 | Little (1971) | redigitized | ||
| Juniperus pinchotii | Juniperus pinchotii | Sudw. | Pinchot juniper | Cupressaceae | 144 | Little (1971) | redigitized | ||
| Juniperus scopulorum | Juniperus scopulorum | Sarg. | Rocky Mountain juniper | Cupressaceae | 844 | Little (1971) | redigitized | ||
| Juniperus silicicola | Juniperus virginiana var. silicicola | (Small) A.E. Murray | southern redcedar | Cupressaceae | 207 | Little (1971) | redigitized | ||
| Juniperus virginiana | Juniperus virginiana | L. | eastern redcedar | Cupressaceae | 4197 | Little (1971) | redigitized | ||
| Kalmia latifolia | Kalmia latifolia | L. | mountain-laurel | Ericaceae | 1345 | Little (1977) | redigitized | ||
| Koeberlinia spinosa | Koeberlinia spinosa | Zucc. | allthorn | Capparaceae | 177 | Little (1976) | redigitized | ||
| Krameria grayi | Krameria grayi | Rose & Painter | white ratany | Krameriaceae | 373 | Benson and Darrow (1981) | new | ||
| Krameria parvifolia | Krameria erecta | Willd. ex Schult. | ratany | Krameriaceae | 423 | Benson and Darrow (1981) | new | ||
| Laguncularia racemosa | Laguncularia racemosa | (L.) C.F. Gaertn. | white-mangrove | Combretaceae | 5 | Little (1978) | redigitized | ||
| Larix laricina | Larix laricina | (Du Roi) K. Koch | tamarack | Pinaceae | 8762 | Little (1971); Viereck and Little (1975) | redigitized | ||
| Larix lyallii | Larix lyallii | Parl. | subalpine larch | Pinaceae | 50 | Little (1971) | redigitized | ||
| Larix occidentalis | Larix occidentalis | Nutt. | western larch | Pinaceae | 245 | Little (1971) | redigitized | ||
| Larrea divaricata | Larrea tridentata | (Sessé & Moc. ex DC.) Coville | creosote bush | Zygophyllaceae | 801 | Yang (1970) | Yang (1970) | redigitized | |
| Leitneria floridana | Leitneria floridana | Chapm. | corkwood | Simaroubaceae | 22 | Little (1977) | redigitized | ||
| Leucaena pulverulenta | Leucaena pulverulenta | (Schltdl.) Benth. | great leadtree | Fabaceae | 12 | Little (1976) | redigitized | ||
| Leucaena retusa | Leucaena retusa | Benth. | littleleaf leadtree | Fabaceae | 71 | Little (1976) | redigitized | ||
| Libocedrus decurrens | Calocedrus decurrens | (Torr.) Florin | incense-cedar | Cupressaceae | 162 | Little (1971) | redigitized | ||
| Lippia wrightii | Aloysia wrightii | A. Heller | Wright lippia | Verbenaceae | 456 | Benson and Darrow (1981) | new | ||
| Liquidambar styraciflua | Liquidambar styraciflua | L. | sweetgum | Altingiaceae | 2098 | Little (1971) | redigitized | ||
| Liriodendron tulipifera | Liriodendron tulipifera | L. | yellow-poplar | Magnoliaceae | 2329 | Little (1971) | redigitized | ||
| Lithocarpus densiflorus | Lithocarpus densiflorus | (Hook. & Arn.) Rehder | tanoak | Fagaceae | 47 | Little (1971) | redigitized | ||
| Lophocereus schottii | Pachycereus schottii | (Engelm.) D.R. Hunt | Senita | Cactaceae | 2 | Turner and others (1995) | new | ||
| Lycium andersonii | Lycium andersonii | A. Gray | Anderson lycium | Solanaceae | 579 | Benson and Darrow (1981) | new | ||
| Lycium cooperi | Lycium cooperi | A. Gray | Cooper lycium | Solanaceae | 236 | Benson and Darrow (1981) | new | ||
| Lycium exsertum | Lycium exsertum | A. Gray | Arizona desert-thorn | Solanaceae | 114 | Benson and Darrow (1981) | new | ||
| Lycium fremontii | Lycium fremontii | A. Gray | Fremont lycium | Solanaceae | 146 | Benson and Darrow (1981) | new | ||
| Lycium macrodon | Lycium macrodon | A. Gray | desert wolfberry | Solanaceae | 61 | Benson and Darrow (1981) | new | ||
| Lycium parishii | Lycium parishii | A. Gray | Parish lycium | Solanaceae | 103 | Benson and Darrow (1981) | new | ||
| Lyonia ferruginea | Lyonia ferruginea | (Walter) Nutt. | tree lyonia | Ericaceae | 216 | Little (1977) | redigitized | ||
| Lysiloma latisiliquum | Lysiloma latisiliquum | (L.) Benth. | Bahama lysiloma | Fabaceae | 2 | Little (1978) | redigitized | ||
| Maclura pomifera | Maclura pomifera | (Raf.) C.K. Schneid. | Osage-orange | Moraceae | 175 | Little (1971) | redigitized | ||
| Magnolia acuminata | Magnolia acuminata | (L.) L. | cucumbertree | Magnoliaceae | 740 | Little (1971) | redigitized | ||
| Magnolia ashei | Magnolia ashei | Weath. | Ashe magnolia | Magnoliaceae | 7 | Little (1977) | redigitized | ||
| Magnolia fraseri | Magnolia fraseri | Walter | Fraser magnolia | Magnoliaceae | 117 | Little (1977) | redigitized | ||
| Magnolia grandiflora | Magnolia grandiflora | L. | southern magnolia | Magnoliaceae | 582 | Little (1971) | redigitized | ||
| Magnolia macrophylla | Magnolia macrophylla | Michx. | bigleaf magnolia | Magnoliaceae | 231 | Little (1977) | redigitized | ||
| Magnolia pyramidata | Magnolia pyramidata | W. Bartram | pyramid magnolia | Magnoliaceae | 60 | Little (1977) | redigitized | ||
| Magnolia tripetala | Magnolia tripetala | (L.) L. | umbrella magnolia | Magnoliaceae | 277 | Little (1977) | redigitized | ||
| Magnolia virginiana | Magnolia virginiana | L. | sweetbay | Magnoliaceae | 1036 | Little (1971) | redigitized | ||
| Malus angustifolia | Malus angustifolia | (Aiton) Michx. | southern crab apple | Rosaceae | 630 | Little (1977) | redigitized | ||
| Malus coronaria | Malus coronaria | (L.) Mill. | sweet crab apple | Rosaceae | 646 | Little (1977) | redigitized | ||
| Malus diversifolia | Malus fusca | (Raf.) C.K. Schneid. | Oregon crab apple | Rosaceae | 437 | Little (1976); Viereck and Little (1975) | redigitized | ||
| Malus ioensis | Malus ioensis | (Alph. Wood) Britton | prairie crab apple | Rosaceae | 572 | Little (1977) | redigitized | ||
| Mammillaria grahamii | Mammillaria grahamii | Engelm. | Graham pincushion cactus | Cactaceae | 238 | Benson (1982) | Benson (1969, 1982); Powell and others (2008) | new | |
| Mastichodendron foetidissimum | Sideroxylon foetidissimum | Jacq. | false-mastic | Sapotaceae | 3 | Little (1978) | redigitized | ||
| Menodora spinescens | Menodora spinescens | A. Gray | ground thorn | Oleaceae | 152 | Benson and Darrow (1981) | new | ||
| Metopium toxiferum | Metopium toxiferum | (L.) Krug & Urb. | Florida poisontree | Anacardiaceae | 2 | Little (1978) | redigitized | ||
| Mimosa dysocarpa | Mimosa dysocarpa | Benth. | velvet-pod mimosa | Fabaceae | 35 | Benson and Darrow (1981) | new | ||
| Mortonia scabrella | Mortonia scabrella | A. Gray | Rio Grande saddlebush | Celastraceae | 47 | BONAP (2013); Benson and Darrow (1981) | The taxonomy of Mortonia differs among the original sources, and we have chosen to follow ITIS, Tropicos, and BONAP in treating M. scabrella, M. sempervirens, and M. utahensis as individual species | new | |
| Mortonia sempervirens | Mortonia sempervirens | A. Gray | Rio Grande saddlebush | Celastraceae | 8 | BONAP (2013); Powell (1998) | The taxonomy of Mortonia differs among the original sources, and we have chosen to follow ITIS, Tropicos, and BONAP in treating M. scabrella, M. sempervirens, and M. utahensis as individual species | new | |
| Mortonia utahensis | Mortonia utahensis | (Coville ex Trel.) A. Nelson | Utah mortonia | Celastraceae | 47 | BONAP (2013); Benson and Darrow (1981) | The taxonomy of Mortonia differs among the original sources, and we have chosen to follow ITIS, Tropicos, and BONAP in treating M. scabrella, M. sempervirens, and M. utahensis as individual species | new | |
| Morus microphylla | Morus microphylla | Buckley | Texas mulberry | Moraceae | 110 | Little (1976) | redigitized | ||
| Morus rubra | Morus rubra | L. | red mulberry | Moraceae | 4171 | Little (1971) | redigitized | ||
| Myrcianthes fragrans | Myrcianthes fragrans | (Sw.) McVaugh | twinberry stopper | Myrtaceae | 9 | Little (1978) | redigitized | ||
| Myrica californica | Morella californica | (Cham.) Wilbur | Pacific bayberry | Myricaceae | 70 | Little (1976) | redigitized | ||
| Myrica cerifera | Morella cerifera | (L.) Small | southern bayberry | Myricaceae | 1040 | Little (1977) | redigitized | ||
| Myrica heterophylla | Morella caroliniensis | (Mill.) Small | evergreen bayberry | Myricaceae | 464 | Little (1977) | redigitized | ||
| Myrica inodora | Morella inodora | (Bartram) Small | odorless bayberry | Myricaceae | 68 | Little (1977) | redigitized | ||
| Myrica pensylvanica | Morella pensylvanica | (Mirb.) Kartesz | northern bayberry | Myricaceae | 205 | Little (1977) | redigitized | ||
| Nectandra coriacea | Nectandra coriacea | (Sw.) Griseb. | Florida nectandra | Lauraceae | 2 | Little (1978) | redigitized | ||
| Nemopanthus collinus | Ilex collina | Alexander | mountain-holly | Aquifoliaceae | 4 | Little (1977) | redigitized | ||
| Nolina bigelovii | Nolina bigelovii | (Torr.) S. Watson | Bigelow nolina | Asparagaceae | 58 | Little (1976); Benson and Darrow (1981) | remapped | ||
| Nolina micrantha | Nolina micrantha | I.M. Johnst. | chaparral beargrass | Asparagaceae | 45 | eFloras (2013) | new | ||
| Nolina microcarpa | Nolina microcarpa | S. Watson | bear grass | Asparagaceae | 261 | Benson and Darrow (1981) | new | ||
| Nolina texana | Nolina texana | S. Watson | sacahuista | Asparagaceae | 240 | Benson and Darrow (1981) | new | ||
| Nyssa aquatica | Nyssa aquatica | L. | water tupelo | Nyssaceae | 689 | Little (1971) | redigitized | ||
| Nyssa ogeche | Nyssa ogeche | Bartram ex Marshall | Ogeechee tupelo | Nyssaceae | 120 | Little (1971) | redigitized | ||
| Nyssa sylvatica | Nyssa sylvatica | Marshall | black tupelo | Nyssaceae | 2940 | Little (1971) | redigitized | ||
| Olneya tesota | Olneya tesota | A. Gray | tesota | Fabaceae | 156 | Little (1976) | redigitized | ||
| Opuntia basilaris | Opuntia basilaris | Engelm. & J.M. Bigelow | beavertail cactus | Cactaceae | 345 | Benson (1982) | Benson (1969, 1982) | new | |
| Opuntia chlorotica | Opuntia chlorotica | Engelm. & J.M. Bigelow | pancake pricklypear | Cactaceae | 219 | Benson (1982) | Benson (1969, 1982) | new | |
| Osmanthus americanus | Osmanthus americanus | (L.) Benth. & Hook. f. ex A. Gray | devilwood | Oleaceae | 437 | Little (1977) | redigitized | ||
| Ostrya knowltonii | Ostrya knowltonii | Coville | Knowlton hophornbeam | Betulaceae | 6 | Little (1976) | redigitized | ||
| Ostrya virginiana | Ostrya virginiana | (Mill.) K. Koch | eastern hophornbeam | Betulaceae | 4491 | Little (1971) | redigitized | ||
| Oxydendrum arboreum | Oxydendrum arboreum | (L.) DC. | sourwood | Ericaceae | 1090 | Little (1977) | redigitized | ||
| Parkinsonia aculeata | Parkinsonia aculeata | L. | Jerusalem-thorn | Fabaceae | 18 | Little (1976) | redigitized | ||
| Parthenium incanum | Parthenium incanum | Kunth | mariola | Asteraceae | 337 | Benson and Darrow (1981) | new | ||
| Perityle emoryi | Perityle emoryi | Torr. | Emory's rockdaisy | Asteraceae | 224 | SEINet (2013); Calflora (2013) | new | ||
| Persea borbonia | Persea borbonia | (L.) Spreng. | redbay | Lauraceae | 720 | Little (1977) | redigitized | ||
| Peucephyllum schottii | Peucephyllum schottii | A. Gray | pygmy cedar | Asteraceae | 188 | Benson and Darrow (1981) | new | ||
| Phoradendron californicum | Phoradendron californicum | Nutt. | desert mistletoe | Santalaceae | 308 | Benson and Darrow (1981) | new | ||
| Photinia arbutifolia | Heteromeles arbutifolia | (Lindl.) M. Roem. | Christmas-berry | Rosaceae | 108 | Little (1976) | redigitized | ||
| Picea breweriana | Picea breweriana | S. Watson | Brewer spruce | Pinaceae | 2 | Little (1971) | redigitized | ||
| Picea engelmannii | Picea engelmannii | Parry ex Engelm. | Engelmann spruce | Pinaceae | 1067 | Little (1971) | redigitized | ||
| Picea glauca | Picea glauca | (Moench) Voss | white spruce | Pinaceae | 9945 | Little (1971); Viereck and Little (1975) | redigitized | ||
| Picea mariana | Picea mariana | (Mill.) Britton, Sterns & Poggenb. | black spruce | Pinaceae | 10036 | Little (1971); Viereck and Little (1975) | redigitized | ||
| Picea pungens | Picea pungens | Engelm. | blue spruce | Pinaceae | 127 | Little (1971) | redigitized | ||
| Picea rubens | Picea rubens | Sarg. | red spruce | Pinaceae | 599 | Little (1971) | redigitized | ||
| Picea sitchensis | Picea sitchensis | (Bong.) Carrière | Sitka spruce | Pinaceae | 418 | Little (1971); Viereck and Little (1975) | redigitized | ||
| Pinckneya pubens | Pinckneya bracteata | (Bartram) Raf. | pinckneya | Rubiaceae | 101 | Little (1977) | redigitized | ||
| Pinus albicaulis | Pinus albicaulis | Engelm. | whitebark pine | Pinaceae | 582 | Little (1971) | redigitized | ||
| Pinus aristata | Pinus aristata | Engelm. | bristlecone pine | Pinaceae | 17 | Little (1971) | Bailey (1970) | We follow Bailey (1970) in the division of what was Pinus aristata (as mapped in Little [1971]) into Pinus aristata and Pinus longaeva | redigitized |
| Pinus attenuata | Pinus attenuata | Lemmon | knobcone pine | Pinaceae | 26 | Little (1971) | redigitized | ||
| Pinus balfouriana | Pinus balfouriana | Balf. | foxtail pine | Pinaceae | 5 | Little (1971) | redigitized | ||
| Pinus banksiana | Pinus banksiana | Lamb. | jack pine | Pinaceae | 4670 | Little (1971) | redigitized | ||
| Pinus cembroides | Pinus cembroides | Zucc. | Mexican pinyon | Pinaceae | 41 | Little (1971); eFloras (2013); SEINet (2013) | We follow eFloras and Little (1971) in treating Pinus discolor and Pinus remota as part of Pinus cembroides | remapped | |
| Pinus clausa | Pinus clausa | (Chapm. ex Engelm.) Sarg. | sand pine | Pinaceae | 87 | Little (1971) | redigitized | ||
| Pinus contorta | Pinus contorta | Douglas ex Loudon | lodgepole pine | Pinaceae | 2319 | Little (1971); Viereck and Little (1975) | redigitized | ||
| Pinus coulteri | Pinus coulteri | Lamb. ex D. Don | Coulter pine | Pinaceae | 6 | Little (1971) | redigitized | ||
| Pinus echinata | Pinus echinata | Mill. | shortleaf pine | Pinaceae | 1645 | Little (1971) | redigitized | ||
| Pinus edulis | Pinus edulis | Engelm. | pinyon | Pinaceae | 364 | Little (1971) | redigitized | ||
| Pinus elliottii | Pinus elliottii | Engelm. | slash pine | Pinaceae | 379 | Little (1971) | redigitized | ||
| Pinus engelmannii | Pinus engelmannii | Carrière | Apache pine | Pinaceae | 7 | Little (1971) | redigitized | ||
| Pinus flexilis | Pinus flexilis | James | limber pine | Pinaceae | 351 | Little (1971) | redigitized | ||
| Pinus glabra | Pinus glabra | Walter | spruce pine | Pinaceae | 337 | Little (1971) | redigitized | ||
| Pinus jeffreyi | Pinus jeffreyi | Balf. | Jeffrey pine | Pinaceae | 115 | Little (1971) | redigitized | ||
| Pinus lambertiana | Pinus lambertiana | Douglas | sugar pine | Pinaceae | 157 | Little (1971) | redigitized | ||
| Pinus leiophylla | Pinus leiophylla | Schiede ex Schltdl. & Cham. | Chihuahua pine | Pinaceae | 13 | Little (1971); Critchfield & Little (1966) | redigitized | ||
| Pinus longaeva | Pinus longaeva | D.K. Bailey | Intermountain bristlecone pine | Pinaceae | 33 | Bailey (1970); Little (1971) | Bailey, 1970 | We follow Bailey (1970) in the division of what was Pinus aristata (as mapped in Little [1971]) into Pinus aristata and Pinus longaeva. We further revised the distribution of Pinus longaeva based on newer sources | remapped |
| Pinus monophylla | Pinus monophylla | Torr. & Frém. | singleleaf pinyon | Pinaceae | 120 | Little (1971) | redigitized | ||
| Pinus monticola | Pinus monticola | Douglas ex D. Don | western white pine | Pinaceae | 462 | Little (1971) | redigitized | ||
| Pinus muricata | Pinus muricata | D. Don | bishop pine | Pinaceae | 3 | Little (1971) | redigitized | ||
| Pinus palustris | Pinus palustris | Mill. | longleaf pine | Pinaceae | 773 | Little (1971) | redigitized | ||
| Pinus ponderosa | Pinus ponderosa | Douglas ex Lawson & C. Lawson | ponderosa pine | Pinaceae | 912 | Little (1971) | redigitized | ||
| Pinus pungens | Pinus pungens | Lamb. | Table-Mountain pine | Pinaceae | 132 | Little (1971) | redigitized | ||
| Pinus quadrifolia | Pinus quadrifolia | Parl. ex Sudw. | Parry pinyon | Pinaceae | 5 | Little (1971); Calflora (2013) | remapped | ||
| Pinus resinosa | Pinus resinosa | Aiton | red pine | Pinaceae | 1757 | Little (1971) | redigitized | ||
| Pinus rigida | Pinus rigida | Mill. | pitch pine | Pinaceae | 714 | Little (1971) | redigitized | ||
| Pinus sabiniana | Pinus sabiniana | Douglas ex D. Don | Digger pine | Pinaceae | 60 | Little (1971) | redigitized | ||
| Pinus serotina | Pinus serotina | Michx. | pond pine | Pinaceae | 465 | Little (1971) | redigitized | ||
| Pinus strobiformis | Pinus strobiformis | Engelm. | southwestern white pine | Pinaceae | 23 | Little (1971); Critchfield and Little (1966) | redigitized | ||
| Pinus strobus | Pinus strobus | L. | eastern white pine | Pinaceae | 2763 | Little (1971) | redigitized | ||
| Pinus taeda | Pinus taeda | L. | loblolly pine | Pinaceae | 1287 | Little (1971) | redigitized | ||
| Pinus virginiana | Pinus virginiana | Mill. | Virginia pine | Pinaceae | 796 | Little (1971) | redigitized | ||
| Pithecellobium flexicaule | Ebenopsis ebano | (Berland.) Barneby & J.W. Grimes | ebony blackbead | Fabaceae | 37 | Little (1976) | redigitized | ||
| Pithecellobium guadalupense | Pithecellobium keyense | Britton | Guadeloupe blackbead | Fabaceae | 4 | Little (1978) | redigitized | ||
| Pithecellobium pallens | Havardia pallens | (Benth.) Britton & Rose | huajillo | Fabaceae | 58 | Little (1976) | redigitized | ||
| Planera aquatica | Planera aquatica | J.F. Gmel. | planertree | Ulmaceae | 635 | Little (1977) | redigitized | ||
| Platanus occidentalis | Platanus occidentalis | L. | American sycamore | Platanaceae | 3757 | Little (1971) | redigitized | ||
| Platanus racemosa | Platanus racemosa | Nutt. | California sycamore | Platanaceae | 86 | Little (1976) | redigitized | ||
| Platanus wrightii | Platanus wrightii | S. Watson | Arizona sycamore | Platanaceae | 106 | Little (1976) | redigitized | ||
| Populus angustifolia | Populus angustifolia | E. James | narrowleaf cottonwood | Salicaceae | 464 | Little (1976) | redigitized | ||
| Populus balsamifera | Populus balsamifera | L. | balsam poplar | Salicaceae | 8855 | Little (1971); Viereck and Little (1975) | redigitized | ||
| Populus deltoides | Populus deltoides | W. Bartram ex Marshall | eastern cottonwood | Salicaceae | 5749 | Little (1971) | redigitized | ||
| Populus fremontii | Populus fremontii | S. Watson | Fremont cottonwood | Salicaceae | 329 | Little (1971, 1976) | P. fremontii now includes what Little (1976) mapped as P. arizonica | two species were merged | |
| Populus grandidentata | Populus grandidentata | Michx. | bigtooth aspen | Salicaceae | 3028 | Little (1971) | redigitized | ||
| Populus heterophylla | Populus heterophylla | L. | swamp cottonwood | Salicaceae | 314 | Little (1971) | redigitized | ||
| Populus tremuloides | Populus tremuloides | Michx. | quaking aspen | Salicaceae | 10856 | Little (1971); Viereck and Little (1975) | redigitized | ||
| Populus trichocarpa | Populus trichocarpa | Torr. & A. Gray | black cottonwood | Salicaceae | 1872 | Little (1971); Viereck and Little (1975) | redigitized | ||
| Prosopis glandulosa | Prosopis glandulosa | Torr. | honey mesquite | Fabaceae | 1889 | Benson and Darrow (1981); SEINet (2013); Calflora (2013) | Burkart (1976) | Prosopis glandulosa as used here includes what has been known as either Prosopis glandulosa var. torreyana or Prosopis juliflora var. torreyana | new |
| Prosopis pubescens | Prosopis pubescens | Benth. | screwbean mesquite | Fabaceae | 203 | Little (1976) | redigitized | ||
| Prosopis velutina | Prosopis velutina | Wooton | velvet mesquite | Fabaceae | 182 | Turner and others (1995); Benson and Darrow (1981) | Burkart (1976) | new | |
| Prunus alleghaniensis | Prunus umbellata | Elliott | Allegheny plum | Rosaceae | 20 | Little (1977) | redigitized | ||
| Prunus americana | Prunus americana | Marshall | American plum | Rosaceae | 3656 | Little (1976, 1977) | redigitized | ||
| Prunus caroliniana | Prunus caroliniana | (Mill.) Aiton | Carolina laurelcherry | Rosaceae | 598 | Little (1977) | redigitized | ||
| Prunus emarginata | Prunus emarginata | (Douglas) Eaton | bitter cherry | Rosaceae | 746 | Little (1976) | redigitized | ||
| Prunus fasciculata | Prunus fasciculata | (Torr.) A. Gray | desert almond | Rosaceae | 307 | Benson and Darrow (1981); Calflora (2013) | new | ||
| Prunus fremontii | Prunus fremontii | S. Watson | desert apricot | Rosaceae | 5 | Little (1976) | redigitized | ||
| Prunus hortulana | Prunus hortulana | L.H. Bailey | hortulan plum | Rosaceae | 263 | Little (1977) | redigitized | ||
| Prunus ilicifolia | Prunus ilicifolia ssp. ilicifolia | hollyleaf cherry | Rosaceae | 55 | Little (1976) | redigitized | |||
| Prunus mexicana | Prunus mexicana | S. Watson | Mexican plum | Rosaceae | 1043 | Little (1977) | redigitized | ||
| Prunus munsoniana | Prunus rivularis | Scheele | wildgoose plum | Rosaceae | 249 | Little (1977) | redigitized | ||
| Prunus nigra | Prunus nigra | Aiton | Canada plum | Rosaceae | 734 | Little (1977) | redigitized | ||
| Prunus pensylvanica | Prunus pensylvanica | L. f. | pin cherry | Rosaceae | 6746 | Little (1976, 1977) | redigitized | ||
| Prunus serotina | Prunus serotina | Ehrh. | black cherry | Rosaceae | 4671 | Little (1971) | redigitized | ||
| Prunus subcordata | Prunus subcordata | Benth. | Klamath plum | Rosaceae | 157 | Little (1976) | redigitized | ||
| Prunus umbellata | Prunus umbellata | Elliott | flatwoods plum | Rosaceae | 710 | Little (1977) | redigitized | ||
| Prunus virginiana | Prunus virginiana | L. | common chokecherry | Rosaceae | 8865 | Little (1976, 1977) | redigitized | ||
| Pseudotsuga macrocarpa | Pseudotsuga macrocarpa | (Vasey) Mayr | bigcone Douglas-fir | Pinaceae | 11 | Little (1971) | redigitized | ||
| Pseudotsuga menziesii | Pseudotsuga menziesii | (Mirb.) Franco | Douglas-fir | Pinaceae | 1543 | Little (1971) | redigitized | ||
| Psorothamnus thompsoniae | Psorothamnus thompsoniae | (Vail) S.L. Welsh & N.D. Atwood | Thompson dalea | Fabaceae | 38 | SEINet (2013); Schultz and others (2010, Digital Atlas of the Vascular Plants of Utah) | new | ||
| Ptelea crenulata | Ptelea crenulata | Greene | California hoptree | Rutaceae | 38 | Little (1976) | redigitized | ||
| Ptelea trifoliata | Ptelea trifoliata | L. | common hoptree | Rutaceae | 2285 | Little (1976) | redigitized | ||
| Purshia glandulosa | Purshia tridentata var. glandulosa | (Curran) M.E. Jones | Mojave antelope brush | Rosaceae | 77 | Benson and Darrow (1981) | new | ||
| Quercus agrifolia | Quercus agrifolia | Née | California live oak | Fagaceae | 81 | Little (1971) | redigitized | ||
| Quercus alba | Quercus alba | L. | white oak | Fagaceae | 3747 | Little (1971) | redigitized | ||
| Quercus arizonica | Quercus arizonica | Sarg. | Arizona white oak | Fagaceae | 64 | Little (1976) | redigitized | ||
| Quercus arkansana | Quercus arkansana | Sarg. | Arkansas oak | Fagaceae | 20 | Little (1977) | redigitized | ||
| Quercus bicolor | Quercus bicolor | Willd. | swamp white oak | Fagaceae | 1306 | Little (1971) | redigitized | ||
| Quercus chapmanii | Quercus chapmanii | Sarg. | Chapman oak | Fagaceae | 129 | Little (1977) | redigitized | ||
| Quercus chrysolepis | Quercus chrysolepis | Liebm. | canyon live oak | Fagaceae | 170 | Little (1971) | redigitized | ||
| Quercus coccinea | Quercus coccinea | Münchh. | scarlet oak | Fagaceae | 1399 | Little (1971) | redigitized | ||
| Quercus cornelius-mulleri | Quercus cornelius-mulleri | Nixon & K.P. Steele | Muller oak | Fagaceae | 15 | Nixon and Steele (1981) | Nixon (2002); Nixon and Steele (1981); Pavlik and others (1991) | The taxon that Little (1976) considered to be Q. turbinella has been divided into three species (Q. turbinella, Q. cornelius-mulleri, and Q. john-tuckeri) | new |
| Quercus douglasii | Quercus douglasii | Hook. & Arn. | blue oak | Fagaceae | 92 | Little (1971) | redigitized | ||
| Quercus dunnii | Quercus palmeri | Engelm. | Dunn oak | Fagaceae | 29 | Little (1976) | redigitized | ||
| Quercus durandii | Quercus sinuata | Walter | Durand oak | Fagaceae | 272 | Little (1977) | redigitized | ||
| Quercus ellipsoidalis | Quercus ellipsoidalis | E.J. Hill | northern pin oak | Fagaceae | 433 | Little (1971) | redigitized | ||
| Quercus emoryi | Quercus emoryi | Torr. | Emory oak | Fagaceae | 45 | Little (1971) | redigitized | ||
| Quercus engelmannii | Quercus engelmannii | Greene | Engelmann oak | Fagaceae | 7 | Little (1976) | redigitized | ||
| Quercus falcata | Quercus falcata | Michx. | southern red oak | Fagaceae | 2003 | Little (1971) | redigitized | ||
| Quercus gambelii | Quercus gambelii | Nutt. | Gambel oak | Fagaceae | 578 | Little (1971); SEINet (2013) | remapped | ||
| Quercus garryana | Quercus garryana | Douglas ex Hook. | Oregon white oak | Fagaceae | 188 | Little (1971) | redigitized | ||
| Quercus georgiana | Quercus georgiana | M.A. Curtis | Georgia oak | Fagaceae | 5 | Little (1977) | redigitized | ||
| Quercus glaucoides | Quercus laceyi | Small | Lacey oak | Fagaceae | 24 | Little (1976) | redigitized | ||
| Quercus gravesii | Quercus gravesii | Sudw. | Graves oak | Fagaceae | 7 | Little (1976) | redigitized | ||
| Quercus grisea | Quercus grisea | Liebm. | gray oak | Fagaceae | 41 | Little (1976) | redigitized | ||
| Quercus havardii | Quercus havardii | Rydb. | Havard oak | Fagaceae | 114 | Little (1976) | redigitized | ||
| Quercus hinckleyi | Quercus hinckleyi | C.H. Mull. | Hinckley oak | Fagaceae | 5 | eFloras (2013) | new | ||
| Quercus hypoleucoides | Quercus hypoleucoides | A. Camus | silverleaf oak | Fagaceae | 18 | Little (1976) | redigitized | ||
| Quercus ilicifolia | Quercus ilicifolia | Wangenh. | bear oak | Fagaceae | 309 | Little (1977) | redigitized | ||
| Quercus imbricaria | Quercus imbricaria | Michx. | shingle oak | Fagaceae | 987 | Little (1977) | redigitized | ||
| Quercus incana | Quercus incana | W. Bartram | bluejack oak | Fagaceae | 587 | Little (1977) | redigitized | ||
| Quercus john-tuckeri | Quercus john-tuckeri | Nixon & C.H. Mull. | Tucker oak | Fagaceae | 29 | Calflora (2013); SEINet (2013) | Nixon (2002); Nixon and Muller (1994); Pavlik and others (1991) | The taxon that Little (1976) considered to be Q. turbinella has been divided into three species (Q. turbinella, Q. cornelius-mulleri, and Q. john-tuckeri) | new |
| Quercus kelloggii | Quercus kelloggii | Newb. | California black oak | Fagaceae | 125 | Little (1971) | redigitized | ||
| Quercus laevis | Quercus laevis | Walter | turkey oak | Fagaceae | 560 | Little (1977) | redigitized | ||
| Quercus laurifolia | Quercus laurifolia | Michx. | laurel oak | Fagaceae | 768 | Little (1971) | redigitized | ||
| Quercus lobata | Quercus lobata | Née | California white oak | Fagaceae | 142 | Little (1971) | redigitized | ||
| Quercus lyrata | Quercus lyrata | Walter | overcup oak | Fagaceae | 1358 | Little (1971) | redigitized | ||
| Quercus macrocarpa | Quercus macrocarpa | Michaux | bur oak | Fagaceae | 3685 | Little (1971) | redigitized | ||
| Quercus marilandica | Quercus marilandica | Münchh. | blackjack oak | Fagaceae | 2757 | Little (1971) | redigitized | ||
| Quercus michauxii | Quercus michauxii | Nuttall | swamp chestnut oak | Fagaceae | 1427 | Little (1971) | redigitized | ||
| Quercus mohriana | Quercus mohriana | Buckley ex Rydb. | Mohrs oak | Fagaceae | 106 | Little (1976) | redigitized | ||
| Quercus muehlenbergii | Quercus muehlenbergii | Engelm. | chinkapin oak | Fagaceae | 2588 | Little (1971) | redigitized | ||
| Quercus myrtifolia | Quercus myrtifolia | Willd. | myrtle oak | Fagaceae | 145 | Little (1977) | redigitized | ||
| Quercus nigra | Quercus nigra | L. | water oak | Fagaceae | 1575 | Little (1971) | redigitized | ||
| Quercus nuttallii | Quercus texana | Buckley | Nuttall oak | Fagaceae | 406 | Little (1971) | redigitized | ||
| Quercus oblongifolia | Quercus oblongifolia | Torr. | Mexican blue oak | Fagaceae | 8 | Little (1976) | redigitized | ||
| Quercus oglethorpensis | Quercus oglethorpensis | W.H. Duncan | Oglethorpe oak | Fagaceae | 8 | Little (1977) | redigitized | ||
| Quercus palustris | Quercus palustris | Münchh. | pin oak | Fagaceae | 1360 | Little (1971) | redigitized | ||
| Quercus phellos | Quercus phellos | L. | willow oak | Fagaceae | 1500 | Little (1971) | redigitized | ||
| Quercus prinus | Quercus montana | Willdenow | chestnut oak | Fagaceae | 1196 | Little (1971) | redigitized | ||
| Quercus pungens | Quercus pungens | Liebm. | sandpaper oak | Fagaceae | 76 | Little (1976); Benson and Darrow (1981) | remapped | ||
| Quercus rubra | Quercus rubra | L. | northern red oak | Fagaceae | 4325 | Little (1971) | redigitized | ||
| Quercus rugosa | Quercus rugosa | Née | netleaf oak | Fagaceae | 12 | Little (1976) | redigitized | ||
| Quercus shumardii | Quercus shumardii | Buckley | Shumard oak | Fagaceae | 2206 | Little (1971) | redigitized | ||
| Quercus stellata | Quercus stellata | Wangenh. | post oak | Fagaceae | 3195 | Little (1971) | redigitized | ||
| Quercus toumeyi | Quercus toumeyi | Sarg. | Toumey oak | Fagaceae | 9 | Little (1976) | redigitized | ||
| Quercus turbinella | Quercus turbinella | Greene | scrub oak | Fagaceae | 243 | SEINet (2013); Nixon and Steele (1981); Benson and Darrow (1981); Little (1976) | Nixon (2002); Nixon and Steele (1981); Pavlik and others (1991) | The taxon that Little (1976) considered to be Q. turbinella has been divided into three species (Q. turbinella, Q. cornelius-mulleri, and Q. john-tuckeri) | remapped |
| Quercus undulata complex | Quercus undulata complex | wavy leaf oak complex | Fagaceae | 630 | Tucker (1961) | Cottam and others (1959); Tucker (1961) | The taxonomy of this taxon is ambiguous. eFloras describes the difficulty: "Numerous putative hybrid swarms occur throughout the range of Quercus gambelii that involve a number of suspected parental species. Most of these populations have, at one time or another, been referred to as Quercus undulata Torrey. ... Because of the complex variability in these populations, no effort has been made to treat them separately here; indeed, it would be impossible to produce usable keys if these were included as formal taxa." | new | |
| Quercus velutina | Quercus velutina | Lam. | black oak | Fagaceae | 3429 | Little (1971) | redigitized | ||
| Quercus virginiana | Quercus virginiana | Mill. | live oak | Fagaceae | 757 | Little (1971) | redigitized | ||
| Quercus wislizeni | Quercus wislizeni | A. DC. | interior live oak | Fagaceae | 117 | Little (1976) | redigitized | ||
| Rapanea punctata | Myrsine cubana | A. DC. | Florida rapanea | Primulaceae | 58 | Little (1978) | redigitized | ||
| Rhamnus betulaefolia | Frangula betulifolia | (Greene) Grubov | birchleaf buckthorn | Rhamnaceae | 60 | Little (1976) | redigitized | ||
| Rhamnus californica | Frangula californica | (Eschsch.) A. Gray | California buckthorn | Rhamnaceae | 274 | Little (1976) | redigitized | ||
| Rhamnus caroliniana | Frangula caroliniana | (Walter) A. Gray | Carolina buckthorn | Rhamnaceae | 1163 | Little (1977) | redigitized | ||
| Rhamnus crocea | Rhamnus crocea | Nutt. | hollyleaf buckthorn | Rhamnaceae | 150 | Little (1976) | redigitized | ||
| Rhamnus purshiana | Frangula purshiana | (DC.) A. Gray | cascara buckthorn | Rhamnaceae | 498 | Little (1971) | redigitized | ||
| Rhizophora mangle | Rhizophora mangle | L. | mangrove | Rhizophoraceae | 10 | Little (1971, 1978) | redigitized | ||
| Rhododendron catawbiense | Rhododendron catawbiense | Michx. | Catawba rhododendron | Ericaceae | 109 | Little (1977) | redigitized | ||
| Rhododendron macrophyllum | Rhododendron macrophyllum | D. Don ex G. Don | Pacific rhododendron | Ericaceae | 107 | Little (1976) | redigitized | ||
| Rhododendron maximum | Rhododendron maximum | L. | rosebay rhododendron | Ericaceae | 495 | Little (1977) | redigitized | ||
| Rhus choriophylla | Rhus virens var. choriophylla | (Wooton & Standl.) L.D. Benson | Mearns sumac | Anacardiaceae | 12 | Little (1976) | redigitized | ||
| Rhus copallina | Rhus copallinum | L. | shining sumac | Anacardiaceae | 3021 | Little (1977) | redigitized | ||
| Rhus glabra | Rhus glabra | L. | smooth sumac | Anacardiaceae | 4319 | Little (1976, 1977) | redigitized | ||
| Rhus integrifolia | Rhus integrifolia | (Nutt.) Benth. & Hook. f. ex Rothr. | lemonade sumac | Anacardiaceae | 9 | Little (1976) | redigitized | ||
| Rhus lanceolata | Rhus lanceolata | (A. Gray) Britton | prairie sumac | Anacardiaceae | 134 | Little (1976) | redigitized | ||
| Rhus laurina | Malosma laurina | (Nutt.) Nutt. ex Abrams | laurel sumac | Anacardiaceae | 9 | Little (1976) | redigitized | ||
| Rhus microphylla | Rhus microphylla | Engelm. | littleleaf sumac | Anacardiaceae | 334 | Little (1976) | redigitized | ||
| Rhus ovata | Rhus ovata | S. Watson | sugar sumac | Anacardiaceae | 35 | Little (1976) | redigitized | ||
| Rhus typhina | Rhus typhina | L. | staghorn sumac | Anacardiaceae | 1888 | Little (1977) | redigitized | ||
| Robinia kelseyi | Robinia hispida var. kelseyi | (Cowell ex Hutch.) Isely | Kelsey locust | Fabaceae | 3 | Little (1977) | redigitized | ||
| Robinia neomexicana | Robinia neomexicana | A. Gray | New Mexican locust | Fabaceae | 72 | Little (1976) | redigitized | ||
| Robinia pseudoacacia | Robinia pseudoacacia | L. | black locust | Fabaceae | 653 | Little (1971) | redigitized | ||
| Robinia viscosa | Robinia viscosa | Vent. | clammy locust | Fabaceae | 21 | Little (1977) | redigitized | ||
| Sabal mexicana | Sabal mexicana | Mart. | Mexican palmetto | Arecaceae | 2 | Little (1976) | redigitized | ||
| Sabal minor | Sabal minor | (Jacq.) Pers. | dwarf palmetto | Arecaceae | 909 | Little (1977) | redigitized | ||
| Sabal palmetto | Sabal palmetto | (Walter) Lodd. ex Schult. & Schult. f. | cabbage palmetto | Arecaceae | 170 | Little (1971) | redigitized | ||
| Salazaria mexicana | Salazaria mexicana | Torr. | bladder sage | Lamiaceae | 195 | Benson and Darrow (1981) | new | ||
| Salix alaxensis | Salix alaxensis | (Andersson) Coville | feltleaf willow | Salicaceae | 3674 | Little (1976); Viereck and Little (1975) | redigitized | ||
| Salix amygdaloides | Salix amygdaloides | Andersson | peachleaf willow | Salicaceae | 5018 | Little (1971) | redigitized | ||
| Salix arbusculoides | Salix arbusculoides | Andersson | peachleaf willow | Salicaceae | 4640 | Little (1976); Viereck and Little (1975) | redigitized | ||
| Salix bebbiana | Salix bebbiana | Sarg. | Bebb willow | Salicaceae | 9329 | Little (1976, 1977); Viereck and Little (1975) | redigitized | ||
| Salix bonplandiana | Salix bonplandiana | Kunth | Bonpland willow | Salicaceae | 67 | Little (1976) | redigitized | ||
| Salix caroliniana | Salix caroliniana | Michx. | Coastal Plain willow | Salicaceae | 893 | Little (1977) | redigitized | ||
| Salix discolor | Salix discolor | Muhl. | pussy willow | Salicaceae | 5471 | Little (1976, 1977) | redigitized | ||
| Salix exigua | Salix exigua / Salix interior | Nutt. / Rowlee | coyote willow | Salicaceae | 9490 | Little (1976, 1977) | redigitized | ||
| Salix floridana | Salix floridana | Chapm. | Florida willow | Salicaceae | 8 | Little (1977) | redigitized | ||
| Salix fluviatilis | Salix columbiana | (Dorn) Argus | river willow | Salicaceae | 9 | Little (1976) | redigitized | ||
| Salix geyeriana | Salix geyeriana | Andersson | Geyer willow | Salicaceae | 454 | Little (1976) | redigitized | ||
| Salix hindsiana | Salix exigua var. hindsiana | (Benth.) Dorn | Hinds willow | Salicaceae | 219 | Little (1976) | redigitized | ||
| Salix hookeriana | Salix hookeriana | Barratt ex Hook. | Hooker willow | Salicaceae | 56 | Little (1976); Viereck and Little (1975) | redigitized | ||
| Salix laevigata | Salix laevigata | Bebb | red willow | Salicaceae | 174 | Little (1976) | redigitized | ||
| Salix lasiandra | Salix lasiandra | Benth. | Pacific willow | Salicaceae | 3666 | Little (1976); Viereck and Little (1975) | redigitized | ||
| Salix lasiolepis | Salix lasiolepis | Benth. | arroyo willow | Salicaceae | 367 | Little (1976) | redigitized | ||
| Salix lucida | Salix lucida | Muhl. | shining willow | Salicaceae | 4858 | Little (1977) | redigitized | ||
| Salix mackenzieana | Salix prolixa | Andersson | Mackenzie willow | Salicaceae | 2089 | Little (1976) | redigitized | ||
| Salix nigra | Salix nigra / Salix goodingii | Marshall / C.R. Ball | black willow | Salicaceae | 5011 | Little (1971, 1976) | redigitized | ||
| Salix pellita | Salix pellita | (Andersson) Bebb | satiny willow | Salicaceae | 2446 | Little (1977) | redigitized | ||
| Salix petiolaris | Salix petiolaris | Sm. | meadow willow | Salicaceae | 3166 | Little (1976, 1977) | redigitized | ||
| Salix pyrifolia | Salix pyrifolia | Andersson | balsam willow | Salicaceae | 4487 | Little (1977) | redigitized | ||
| Salix scouleriana | Salix scouleriana | Barratt ex Hook. | Scouler willow | Salicaceae | 4607 | Little (1976); Viereck and Little (1975) | redigitized | ||
| Salix sericea | Salix sericea | Marshall | silky willow | Salicaceae | 1468 | Little (1977) | redigitized | ||
| Salix sessilifolia | Salix sessilifolia | Nutt. | northwest willow | Salicaceae | 25 | Little (1976) | redigitized | ||
| Salix sitchensis | Salix sitchensis | Sanson ex Bong. | Sitka willow | Salicaceae | 745 | Little (1976); Viereck and Little (1975) | redigitized | ||
| Salix taxifolia | Salix taxifolia | Kunth | yewleaf willow | Salicaceae | 10 | Little (1976) | redigitized | ||
| Salix tracyi | Salix tracyi | C.R. Ball | Tracy willow | Salicaceae | 18 | Little (1976) | redigitized | ||
| Salvia dorrii | Salvia dorrii | (Kellogg) Abrams | desert sage | Lamiaceae | 507 | SEINet (2013); Calflora (2013); Oregon Flora Project (2013); Schultz and others (2010, Digital Atlas of the Vascular Plants of Utah) | Strachan (1982) | new | |
| Salvia mohavensis | Salvia mohavensis | Greene | Mojave sage | Lamiaceae | 94 | Benson and Darrow (1981) | new | ||
| Salvia pinguifolia | Salvia pinguifolia | (Fernald) Wooton & Standl. | rock sage | Lamiaceae | 129 | Benson and Darrow (1981) | new | ||
| Sambucus callicarpa | Sambucus racemosa var. racemosa | Pacific red elder | Caprifoliaceae | 564 | Little (1976); Viereck and Little (1975) | redigitized | |||
| Sambucus canadensis | Sambucus nigra ssp. canadensis | (L.) R. Bolli | American elder | Caprifoliaceae | 5242 | Little (1977) | redigitized | ||
| Sambucus glauca | Sambucus nigra ssp. cerulea (in part) | (Raf.) R. Bolli | blueberry elder | Caprifoliaceae | 725 | Little (1976) | redigitized | ||
| Sambucus melanocarpa | Sambucus racemosa var. melanocarpa | (A. Gray) McMinn | blackbead elder | Caprifoliaceae | 281 | Little (1976) | redigitized | ||
| Sambucus mexicana | Sambucus nigra ssp. cerulea (in part) | (Raf.) R. Bolli | Mexican elder | Caprifoliaceae | 67 | Little (1976) | redigitized | ||
| Sambucus velutina | Sambucus nigra ssp. cerulea (in part) | (Raf.) R. Bolli | velvet elder | Caprifoliaceae | 19 | Little (1976) | redigitized | ||
| Sapindus drummondii | Sapindus saponaria var. drummondii | (Hook. & Arn.) L.D. Benson | western soapberry | Sapindaceae | 1003 | Little (1976, 1977) | redigitized | ||
| Sapindus saponaria | Sapindus saponaria | L. | wingleaf soapberry | Sapindaceae | 2 | Little (1977, 1978) | redigitized | ||
| Sapium biloculare | Sebastiania bilocularis | S. Watson | jumping-bean sapium | Euphorbiaceae | 11 | Little (1976) | redigitized | ||
| Sassafras albidum | Sassafras albidum | (Nutt.) Nees | sassafras | Lauraceae | 3232 | Little (1971) | redigitized | ||
| Sequoia sempervirens | Sequoia sempervirens | (D. Don) Endl. | redwood | Cupressaceae | 18 | Little (1971) | redigitized | ||
| Sequoiadendron giganteum | Sequoiadendron giganteum | (Lindl.) J. Buchholz | Sierra redwood | Cupressaceae | 14 | Calflora (2013); Little (1971) | remapped | ||
| Serenoa repens | Serenoa repens | (W. Bartram) Small | saw-palmetto | Arecaceae | 293 | Little (1977) | redigitized | ||
| Shepherdia argentea | Shepherdia argentea | (Pursh) Nutt. | silver buffaloberry | Elaeagnaceae | 1470 | Little (1976, 1977) | redigitized | ||
| Shepherdia rotundifolia | Shepherdia rotundifolia | Parry | roundleaf buffaloberry | Elaeagnaceae | 123 | SEINet (2013); Schultz and others (2010, Digital Atlas of the Vascular Plants of Utah) | new | ||
| Simarouba glauca | Simarouba glauca | DC. | paradise-tree | Simaroubaceae | 3 | Little (1978) | redigitized | ||
| Simmondsia chinensis | Simmondsia chinensis | (Link) C.K. Schneid. | jojoba | Simmondsiaceae | 200 | Benson and Darrow (1981) | new | ||
| Solanum erianthum | Solanum erianthum | D. Don | mullein nightshade | Solanaceae | 10 | Little (1977, 1978) | redigitized | ||
| Sophora affinis | Styphnolobium affine | (Torr. & A. Gray) Walp. | Texas sophora | Fabaceae | 117 | Little (1977) | redigitized | ||
| Sophora secundiflora | Sophora secundiflora | (Ortega) Lag. ex DC. | mescalbean | Fabaceae | 136 | Little (1976) | redigitized | ||
| Sorbus americana | Sorbus americana | Marshall | American mountain-ash | Rosaceae | 2812 | Little (1977) | redigitized | ||
| Sorbus decora | Sorbus decora | (Sarg.) C.K. Schneid. | showy mountain-ash | Rosaceae | 3517 | Little (1977) | redigitized | ||
| Sorbus scopulina | Sorbus scopulina | Greene | Greene mountain-ash | Rosaceae | 1656 | Little (1976); Viereck and Little (1975) | redigitized | ||
| Sorbus sitchensis | Sorbus sitchensis | M. Roem. | Sitka mountain-ash | Rosaceae | 990 | Little (1976); Viereck and Little (1975) | redigitized | ||
| Staphylea bolanderi | Staphylea bolanderi | A. Gray | Sierra bladdernut | Staphyleaceae | 17 | Little (1976) | redigitized | ||
| Staphylea trifolia | Staphylea trifolia | L. | American bladdernut | Staphyleaceae | 1874 | Little (1977) | redigitized | ||
| Stenocereus thurberi | Stenocereus thurberi | (Engelm.) Buxb. | organpipe cactus | Cactaceae | 9 | Turner and others (1995) | Yetman (2006) | new | |
| Stewartia malacodendron | Stewartia malacodendron | L. | Virginia stewartia | Theaceae | 141 | Little (1977) | redigitized | ||
| Stewartia ovata | Stewartia ovata | (Cav.) Weath. | mountain stewartia | Theaceae | 80 | Little (1977) | redigitized | ||
| Styrax americana | Styrax americanus | Lam. | American snowbell | Styracaceae | 1056 | Little (1977) | redigitized | ||
| Styrax grandifolia | Styrax grandifolius | Aiton | bigleaf snowbell | Styracaceae | 758 | Little (1977) | redigitized | ||
| Styrax platanifolia | Styrax platanifolius | Engelm. ex Torr. | sycamore-leaf snowbell | Styracaceae | 31 | Little (1977) | redigitized | ||
| Suriana maritima | Suriana maritima | L. | baycedar | Surianaceae | 2 | Little (1978) | redigitized | ||
| Symphoricarpos longiflorus | Symphoricarpos longiflorus | A. Gray | desert snowberry | Caprifoliaceae | 492 | SEINet (2013); Calflora (2013); Oregon Flora Project (2013); Schultz and others (2010, Digital Atlas of the Vascular Plants of Utah) | new | ||
| Symplocos tinctoria | Symplocos tinctoria | (L.) L'Hér. | common sweetleaf | Symplocaceae | 922 | Little (1977) | redigitized | ||
| Taxodium distichum | Taxodium distichum | (L.) Rich. | baldcypress | Cupressaceae | 1311 | Little (1971) | redigitized | ||
| Taxus brevifolia | Taxus brevifolia | Nutt. | Pacific yew | Taxaceae | 566 | Little (1971); Viereck and Little (1975) | redigitized | ||
| Taxus canadensis | Taxus canadensis | Marshall | Canada yew | Taxaceae | 3557 | Little (1971) | redigitized | ||
| Tetradymia glabrata | Tetradymia glabrata | Torr. & A. Gray | littleleaf horsebrush | Asteraceae | 567 | SEINet (2013); Calflora (2013); Oregon Flora Project (2013); Schultz and others (2010, Digital Atlas of the Vascular Plants of Utah) | new | ||
| Tetradymia stenolepis | Tetradymia stenolepis | Greene | Mojave horse brush | Asteraceae | 34 | Benson and Darrow (1981) | new | ||
| Thamnosma montana | Thamnosma montana | Torr. & Frém. | turpentine broom | Rutaceae | 261 | Benson and Darrow (1981) | new | ||
| Thuja occidentalis | Thuja occidentalis | L. | northern white-cedar | Cupressaceae | 2420 | Little (1971) | redigitized | ||
| Thuja plicata | Thuja plicata | Donn ex D. Don | western redcedar | Cupressaceae | 607 | Little (1971); Viereck and Little (1975) | redigitized | ||
| Tilia americana | Tilia americana var. americana | American basswood | Malvaceae | 3314 | Little (1971) | redigitized | |||
| Tilia caroliniana | Tilia americana var. caroliniana | (P. Mill.) Castigl. | Carolina basswood | Malvaceae | 999 | Little (1977) | redigitized | ||
| Tilia heterophylla | Tilia americana var. heterophylla | (Vent.) Loud. | white basswood | Malvaceae | 833 | Little (1971) | redigitized | ||
| Torreya californica | Torreya californica | Torr. | California torreya | Taxaceae | 4 | Little (1971) | redigitized | ||
| Toxicodendron vernix | Toxicodendron vernix | (L.) Kuntze | poison-sumac | Anacardiaceae | 850 | Little (1977) | redigitized | ||
| Trema micrantha | Trema micrantha | (L.) Blume | Florida trema | Cannabaceae | 18 | Little (1978) | redigitized | ||
| Trixis californica | Trixis californica | Kellogg | American threefold | Asteraceae | 402 | Benson and Darrow (1981) | new | ||
| Tsuga canadensis | Tsuga canadensis | (L.) Carrière | eastern hemlock | Pinaceae | 1790 | Little (1971) | redigitized | ||
| Tsuga caroliniana | Tsuga caroliniana | Engelm. | Carolina hemlock | Pinaceae | 27 | Little (1971) | redigitized | ||
| Tsuga heterophylla | Tsuga heterophylla | (Raf.) Sarg. | western hemlock | Pinaceae | 647 | Little (1971); Viereck and Little (1975) | redigitized | ||
| Tsuga mertensiana | Tsuga mertensiana | (Bong.) Carrière | mountain hemlock | Pinaceae | 371 | Little (1971); Viereck and Little (1975) | redigitized | ||
| Ulmus alata | Ulmus alata | Michx. | winged elm | Ulmaceae | 1810 | Little (1971) | redigitized | ||
| Ulmus americana | Ulmus americana | L. | American elm | Ulmaceae | 7780 | Little (1971) | redigitized | ||
| Ulmus crassifolia | Ulmus crassifolia | Nutt. | cedar elm | Ulmaceae | 643 | Little (1971) | redigitized | ||
| Ulmus rubra | Ulmus rubra | Muhl. | slippery elm | Ulmaceae | 4198 | Little (1971) | redigitized | ||
| Ulmus serotina | Ulmus serotina | Sarg. | September elm | Ulmaceae | 63 | Little (1971) | redigitized | ||
| Ulmus thomasii | Ulmus thomasii | Sarg. | rock elm | Ulmaceae | 1187 | Little (1971) | redigitized | ||
| Umbellularia californica | Umbellularia californica | (Hook. & Arn.) Nutt. | California-laurel | Lauraceae | 122 | Little (1971) | redigitized | ||
| Ungnadia speciosa | Ungnadia speciosa | Endl. | Mexican-buckeye | Sapindaceae | 38 | Little (1976) | redigitized | ||
| Vaccinium arboreum | Vaccinium arboreum | Marshall | tree sparkleberry | Ericaceae | 1638 | Little (1977) | redigitized | ||
| Vauquelinia californica | Vauquelinia californica | (Torr.) Sarg. | Torrey vauquelinia | Rosaceae | 40 | Little (1976); SEINet (2013) | V. californica now includes what was previously considered as V. pauciflora | remapped and merged two former species | |
| Viburnum lentago | Viburnum lentago | L. | nannyberry | Caprifoliaceae | 1730 | Little (1976, 1977) | redigitized | ||
| Viburnum nudum | Viburnum nudum | L. | possumhaw viburnum | Caprifoliaceae | 885 | Little (1977) | redigitized | ||
| Viburnum obovatum | Viburnum obovatum | Walter | Walter viburnum | Caprifoliaceae | 248 | Little (1977) | redigitized | ||
| Viburnum prunifolium | Viburnum prunifolium | L. | blackhaw | Caprifoliaceae | 1364 | Little (1977) | redigitized | ||
| Viburnum rufidulum | Viburnum rufidulum | Raf. | rusty blackhaw | Caprifoliaceae | 1824 | Little (1977) | redigitized | ||
| Viburnum trilobum | Viburnum opulus var. americanum | Aiton | American cranberrybush | Caprifoliaceae | 1937 | Little (1976, 1977) | redigitized | ||
| Viguiera stenoloba | Viguiera stenoloba | S.F. Blake | resinbush | Asteraceae | 106 | Benson and Darrow (1981) | new | ||
| Washingtonia filifera | Washingtonia filifera | (Linden ex André) H. Wendl. ex de Bary | California washingtonia | Arecaceae | 2 | Little (1976) | redigitized | ||
| Ximenia americana | Ximenia americana | L. | tallowwood | Ximeniaceae | 86 | Little (1978) | redigitized | ||
| Yucca aloifolia | Yucca aloifolia | L. | aloe yucca | Asparagaceae | 46 | Little (1977) | redigitized | ||
| Yucca angustissima | Yucca angustissima | Engelm. ex Trel. | narrowleaf yucca | Asparagaceae | 299 | eFloras (2013) | new | ||
| Yucca baccata | Yucca baccata | Torr. | banana yucca | Asparagaceae | 934 | Benson and Darrow (1981) | new | ||
| Yucca brevifolia | Yucca brevifolia | Engelm. | Joshua-tree | Asparagaceae | 161 | Little (1976); Benson and Darrow (1981); Calflora (2013) | remapped | ||
| Yucca elata | Yucca elata | Engelm. | soaptree yucca | Asparagaceae | 293 | Little (1976) | redigitized | ||
| Yucca faxoniana | Yucca faxoniana | Sarg. | Faxon yucca, Carneros yucca | Asparagaceae | 15 | Little (1976) | Y. faxoniana now includes what was considered as Y. carnerosana in Little (1976) | two species were merged | |
| Yucca gloriosa | Yucca gloriosa | L. | moundlily yucca | Asparagaceae | 10 | Little (1977) | redigitized | ||
| Yucca mohavensis | Yucca schidigera | Ortgies | Mohave yucca | Asparagaceae | 92 | Little (1976) | redigitized | ||
| Yucca schottii | Yucca x schottii | Engelm. (pro. sp.) | Schotts yucca | Asparagaceae | 12 | Little (1976) | redigitized | ||
| Yucca treculeana | Yucca treculeana | Carrière | Trecul yucca, Torrey yucca | Asparagaceae | 235 | Little (1976) | Y. treculeana now includes what was considered as Y. torreyi in Little (1976) | two species were merged | |
| Zanthoxylum americanum | Zanthoxylum americanum | Mill. | common prickly-ash | Rutaceae | 1470 | Little (1977) | redigitized | ||
| Zanthoxylum clava-herculis | Zanthoxylum clava-herculis | L. | Hercules-club | Rutaceae | 545 | Little (1977) | redigitized | ||
| Zanthoxylum fagara | Zanthoxylum fagara | (L.) Sarg. | lime prickly-ash | Rutaceae | 178 | Little (1977, 1978) | redigitized | ||
| Zanthoxylum hirsutum | Zanthoxylum hirsutum | Buckley | Texas Hercules-club | Rutaceae | 180 | Little (1977) | redigitized | ||
| Ziziphus parryi | Ziziphus parryi | Torr. | California lotebush | Rhamnaceae | 14 | Benson and Darrow (1981) | new |
U.S. Department of the Interior |
U.S. Geological Survey
URL: http://pubsdata.usgs.gov/pubs/pp/p1650-g/table1.html
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Page Last Modified: Friday, 18-Dec-2015 15:29:01 EST
