Professional Paper 1650–G
| Group | Number of gridpoints | Number of Species | Status | Notes | Species included in the group |
|---|---|---|---|---|---|
| ABIES | 7321 | 9 | Abies amabilis, Abies balsamea, Abies bracteata, Abies concolor, Abies fraseri, Abies grandis, Abies lasiocarpa, Abies magnifica, Abies procera | ||
| ABIES EAST | 4947 | 2 | Abies balsamea, Abies fraseri | ||
| ABIES WEST | 2374 | 7 | Abies amabilis, Abies bracteata, Abies concolor, Abies grandis, Abies lasiocarpa, Abies magnifica, Abies procera | ||
| ACER | 11388 | 13 | Acer barbatum, Acer circinatum, Acer glabrum, Acer grandidentatum, Acer leucoderme, Acer macrophyllum, Acer negundo, Acer nigrum, Acer pensylvanicum, Acer rubrum, Acer saccharinum, Acer saccharum, Acer spicatum | ||
| ACER EAST | 6855 | 8 | Acer negundo is too widespread to include in either the ACER EAST or ACER WEST groups. | Acer barbatum, Acer leucoderme, Acer nigrum, Acer pensylvanicum, Acer rubrum, Acer saccharinum, Acer saccharum, Acer spicatum | |
| ACER WEST | 1978 | 4 | Acer negundo is too widespread to include in either the ACER EAST or ACER WEST groups. | Acer circinatum, Acer glabrum, Acer grandidentatum, Acer macrophyllum | |
| AESCULUS | 2889 | 6 | Aesculus californica, Aesculus glabra, Aesculus octandra, Aesculus parviflora, Aesculus pavia, Aesculus sylvatica | ||
| ALNUS | 13382 | 8 | Alnus maritima, Alnus oblongifolia, Alnus rhombifolia, Alnus rubra, Alnus rugosa, Alnus serrulata, Alnus sinuata, Alnus tenuifolia | ||
| ALNUS EAST | 10176 | 3 | Alnus maritima, Alnus rugosa, Alnus serrulata | ||
| ALNUS WEST | 4804 | 5 | Alnus oblongifolia, Alnus rhombifolia, Alnus rubra, Alnus sinuata, Alnus tenuifolia | ||
| ARTEMISIA SUBGENUS TRIDENTATAE | 2070 | 7 | revised | Artemisia arbuscula, Artemisia bigelovii, Artemisia cana, Artemisia nova, Artemisia rigida, Artemisia tridentata, Artemisia tripartita | |
| BETULA | 16691 | 7 | Betula alleghaniensis, Betula lenta, Betula nana, Betula nigra, Betula occidentalis, Betula papyrifera, Betula populifolia | ||
| CARYA | 4554 | 11 | Carya aquatica, Carya cordiformis, Carya floridana, Carya glabra, Carya illinoensis, Carya laciniosa, Carya myristicaeformis, Carya ovata, Carya pallida, Carya texana, Carya tomentosa | ||
| CASTANEA | 2225 | 4 | Castanea alnifolia, Castanea dentata, Castanea ozarkensis, Castanea pumila | ||
| CUPRESSACEAE EAST | 6989 | 6 | revised | Added Chamaecyparis thyoides (excluded by error in 1650-A). | Chamaecyparis thyoides, Juniperus ashei, Juniperus silicicola, Juniperus virginiana, Taxodium distichum, Thuja occidentalis |
| CUPRESSACEAE / TAXACEAE | 18581 | 32 | revised | Added Juniperus erythrocarpa, removed three species of Cupressus that no longer have any grid points following improved digitizing (Cupressus goveniana, Cupressus guadalupensis, and Cupressus macrocarpa), as well as Taxodium mucronatum (no CANUSA gridpoints). The Taxodiaceae is now considered to be part of the Cupressaceae. | Chamaecyparis lawsoniana, Chamaecyparis nootkatensis, Chamaecyparis thyoides, Cupressus arizonica, Cupressus bakeri, Cupressus macnabiana, Cupressus sargentii, Juniperus ashei, Juniperus californica, Juniperus communis, Juniperus deppeana, Juniperus erythrocarpa, Juniperus flaccida, Juniperus horizontalis, Juniperus monosperma, Juniperus occidentalis, Juniperus osteosperma, Juniperus pinchotii, Juniperus scopulorum, Juniperus silicicola, Juniperus virginiana, Libocedrus decurrens, Sequoia sempervirens, Sequoiadendron giganteum, Taxodium distichum, Taxus brevifolia, Taxus canadensis, Taxus floridana, Thuja occidentalis, Thuja plicata, Torreya californica, Torreya taxifolia |
| CUPRESSACEAE / TAXACEAE EAST | 8144 | 9 | revised | The Taxodiaceae is now considered to be part of the Cupressaceae. | Chamaecyparis thyoides, Juniperus ashei, Juniperus silicicola, Juniperus virginiana, Taxodium distichum, Taxus canadensis, Taxus floridana, Thuja occidentalis, Torreya taxifolia |
| CUPRESSACEAE / TAXACEAE WEST | 2522 | 21 | revised | Added Juniperus erythrocarpa, removed three species of Cupressus that no longer have any grid points following improved digitizing (Cupressus goveniana, Cupressus guadalupensis, and Cupressus macrocarpa), as well as Taxodium mucronatum (no CANUSA gridpoints). The Taxodiaceae is now considered to be part of the Cupressaceae. | Chamaecyparis lawsoniana, Chamaecyparis nootkatensis, Cupressus arizonica, Cupressus bakeri, Cupressus macnabiana, Cupressus sargentii, Juniperus californica, Juniperus deppeana, Juniperus erythrocarpa, Juniperus flaccida, Juniperus monosperma, Juniperus occidentalis, Juniperus osteosperma, Juniperus pinchotii, Juniperus scopulorum, Libocedrus decurrens, Sequoia sempervirens, Sequoiadendron giganteum, Taxus brevifolia, Thuja plicata, Torreya californica |
| CYLINDROPUNTIA ACANTHOCARPA / CYLINDROPUNTIA GANDERI | 259 | 2 | new | These two species are included as a group because Cylindropuntia ganderi was split off from Cylindropuntia acanthocarpa (and paleobotanists/ecologists may have identified what is now Cylindropuntia ganderi as Cylindropuntia acanthocarpa). | Cylindropuntia acanthocarpa, Cylindropuntia ganderi |
| FRAXINUS | 9304 | 15 | revised | Remapped Fraxinus anomala. | Fraxinus americana, Fraxinus anomala, Fraxinus berlandieriana, Fraxinus caroliniana, Fraxinus cuspidata, Fraxinus dipetala, Fraxinus greggii, Fraxinus latifolia, Fraxinus nigra, Fraxinus papillosa, Fraxinus pennsylvanica, Fraxinus profunda, Fraxinus quadrangulata, Fraxinus texensis, Fraxinus velutina |
| FRAXINUS EAST | 8556 | 6 | Fraxinus americana, Fraxinus caroliniana, Fraxinus nigra, Fraxinus pennsylvanica, Fraxinus profunda, Fraxinus quadrangulata | ||
| FRAXINUS WEST | 774 | 9 | revised | Remapped Fraxinus anomala. | Fraxinus anomala, Fraxinus berlandieriana, Fraxinus cuspidata, Fraxinus dipetala, Fraxinus greggii, Fraxinus latifolia, Fraxinus papillosa, Fraxinus texensis, Fraxinus velutina |
| HESPEROYUCCA | 115 | 2 | new | These two species together form a group equivalent to what was considered Yucca whipplei. | Hesperoyucca newberryi, Hesperoyucca whipplei |
| JUGLANS | 4247 | 5 | revised | Removed Juglans hindsii (which no longer has any grid points following improved digitizing). | Juglans californica, Juglans cinerea, Juglans major, Juglans microcarpa, Juglans nigra |
| JUGLANS EAST | 4109 | 2 | Juglans cinerea, Juglans nigra | ||
| JUGLANS WEST | 141 | 3 | revised | Removed Juglans hindsii (which no longer has any grid points following improved digitizing). | Juglans californica, Juglans major, Juglans microcarpa |
| JUNIPERUS | 16981 | 14 | revised | Juniperus erythrocarpa was added to the group. | Juniperus ashei, Juniperus californica, Juniperus communis, Juniperus deppeana, Juniperus erythrocarpa, Juniperus flaccida, Juniperus horizontalis, Juniperus monosperma, Juniperus occidentalis, Juniperus osteosperma, Juniperus pinchotii, Juniperus scopulorum, Juniperus silicicola, Juniperus virginiana |
| JUNIPERUS BOREAL | 11570 | 2 | Juniperus communis, Juniperus horizontalis | ||
| JUNIPERUS EAST | 4449 | 3 | Juniperus ashei, Juniperus silicicola, Juniperus virginiana | ||
| JUNIPERUS WEST | 1754 | 9 | revised | Juniperus erythrocarpa was added to the group. | Juniperus californica, Juniperus deppeana, Juniperus erythrocarpa, Juniperus flaccida, Juniperus monosperma, Juniperus occidentalis, Juniperus osteosperma, Juniperus pinchotii, Juniperus scopulorum |
| JUNIPERUS WEST WOODLAND with JUNIPERUS CALIFORNICA | 1021 | 6 | revised | Juniperus erythrocarpa was added to the group. | Juniperus californica, Juniperus erythrocarpa, Juniperus monosperma, Juniperus occidentalis, Juniperus osteosperma, Juniperus pinchotii |
| JUNIPERUS WEST WOODLAND without JUNIPERUS CALIFORNICA | 898 | 5 | new | This group was created because Juniperus californica is more xerophytic than the other "woodland" junipers. | Juniperus erythrocarpa, Juniperus monosperma, Juniperus occidentalis, Juniperus osteosperma, Juniperus pinchotii |
| JUNIPERUS WEST WOODLAND (SOUTHWEST) | 355 | 3 | new | The taxonomy of these closely related species has changed through time, and this group was created for paleobotanical analyses. | Juniperus erythrocarpa, Juniperus monosperma, Juniperus pinchotii |
| LARIX | 9053 | 3 | Larix laricina, Larix lyallii, Larix occidentalis | ||
| LARIX / PSEUDOTSUGA | 10351 | 5 | Larix laricina, Larix lyallii, Larix occidentalis, Pseudotsuga macrocarpa, Pseudotsuga menziesii | ||
| MAGNOLIA | 1815 | 8 | Magnolia acuminata, Magnolia ashei, Magnolia fraseri, Magnolia grandiflora, Magnolia macrophylla, Magnolia pyramidata, Magnolia tripetala, Magnolia virginiana | ||
| MORTONIA | 102 | 3 | new | The taxonomy of these three species is confusing, and it may be wise to treat them as a group for paleobotanical purposes. This group does not include M. greggii. | Mortonia scabrella, Mortonia sempervirens, Mortonia utahensis |
| OSTRYA / CARPINUS | 4921 | 3 | Carpinus caroliniana, Ostrya knowltonii, Ostrya virginiana | ||
| PICEA | 12112 | 7 | Picea breweriana, Picea engelmannii, Picea glauca, Picea mariana, Picea pungens, Picea rubens, Picea sitchensis | ||
| PICEA NORTH / EAST | 10965 | 3 | Picea glauca, Picea mariana, Picea rubens | ||
| PICEA WEST | 1505 | 4 | Picea breweriana, Picea engelmannii, Picea pungens, Picea sitchensis | ||
| PICEA WEST INTERIOR | 1091 | 2 | Picea engelmannii, Picea pungens | ||
| PINUS | 11655 | 35 | revised | Species of Pinus that do not occur in CANUSA were removed from this group, and Pinus washoensis was added. | Pinus albicaulis, Pinus aristata, Pinus attenuata, Pinus balfouriana, Pinus banksiana, Pinus cembroides, Pinus clausa, Pinus contorta, Pinus coulteri, Pinus echinata, Pinus edulis, Pinus elliottii, Pinus engelmannii, Pinus flexilis, Pinus glabra, Pinus jeffreyi, Pinus lambertiana, Pinus leiophylla, Pinus longaeva, Pinus monophylla, Pinus monticola, Pinus muricata, Pinus palustris, Pinus ponderosa, Pinus pungens, Pinus quadrifolia, Pinus resinosa, Pinus rigida, Pinus sabiniana, Pinus serotina, Pinus strobiformis, Pinus strobus, Pinus taeda, Pinus virginiana, Pinus washoensis |
| PINUS EAST | 8153 | 13 | Pinus banksiana, Pinus clausa, Pinus echinata, Pinus elliottii, Pinus glabra, Pinus palustris, Pinus pungens, Pinus resinosa, Pinus rigida, Pinus serotina, Pinus strobus, Pinus taeda, Pinus virginiana | ||
| PINUS NORTHEAST | 6521 | 4 | Pinus banksiana, Pinus resinosa, Pinus rigida, Pinus strobus | ||
| PINUS NORTHEAST YELLOW | 5995 | 3 | Pinus banksiana, Pinus resinosa, Pinus rigida | ||
| PINUS SOUTHEAST | 2152 | 9 | Pinus clausa, Pinus echinata, Pinus elliottii, Pinus glabra, Pinus palustris, Pinus pungens, Pinus serotina, Pinus taeda, Pinus virginiana | ||
| PINUS WEST | 3638 | 21 | revised | Pinus washoensis was added to the group. | Pinus albicaulis, Pinus aristata, Pinus attenuata, Pinus balfouriana, Pinus cembroides, Pinus contorta, Pinus coulteri, Pinus edulis, Pinus engelmannii, Pinus flexilis, Pinus jeffreyi, Pinus lambertiana, Pinus leiophylla, Pinus longaeva, Pinus monophylla, Pinus monticola, Pinus ponderosa, Pinus quadrifolia, Pinus sabiniana, Pinus strobiformis, Pinus washoensis |
| PINUS WEST PINYONS | 527 | 4 | Pinus cembroides, Pinus edulis, Pinus monophylla, Pinus quadrifolia | ||
| PINUS WEST PINYONS (NORTHERN) | 484 | 2 | new | There are several confusing issues on the taxonomy of Pinus monophylla vs. Pinus edulis var. fallax and paleobotanists may want to treat these two species together | Pinus edulis, Pinus monophylla |
| PINUS WEST WHITE (EXCLUDING PINYON PINES) | 1268 | 8 | Pinus albicaulis, Pinus aristata, Pinus balfouriana, Pinus flexilis, Pinus lambertiana, Pinus longaeva, Pinus monticola, Pinus strobiformis | ||
| PINUS WEST YELLOW | 3018 | 9 | revised | Pinus washoensis was added to the group. | Pinus attenuata, Pinus contorta, Pinus coulteri, Pinus engelmannii, Pinus jeffreyi, Pinus leiophylla, Pinus ponderosa, Pinus sabiniana, Pinus washoensis |
| PLATANUS | 3949 | 3 | Platanus occidentalis, Platanus racemosa, Platanus wrightii | ||
| POPULUS | 18162 | 9 | Populus angustifolia, Populus balsamifera, Populus deltoides, Populus fremontii, Populus grandidentata, Populus heterophylla, Populus hinckleyana, Populus tremuloides, Populus trichocarpa | ||
| PROSOPIS | 1943 | 3 | new | Prosopis glandulosa, Prosopis pubescens, Prosopis velutina | |
| PROSOPIS GLANDULOSA / PROSOPIS VELUTINA | 1939 | 2 | new | Prosopis glandulosa, Prosopis velutina | |
| PSEUDOTSUGA | 1554 | 2 | Pseudotsuga macrocarpa, Pseudotsuga menziesii | ||
| QUERCUS | 8857 | 60 | revised | With improved digitizing of the original maps, the distributions of Quercus ajoensis and Quercus graciliformis no longer intersect with any of the 25 km gridpoints. | Quercus agrifolia, Quercus alba, Quercus arizonica, Quercus arkansana, Quercus bicolor, Quercus chapmanii, Quercus chrysolepis, Quercus coccinea, Quercus cornelius-mulleri, Quercus douglasii, Quercus dunnii, Quercus durandii, Quercus ellipsoidalis, Quercus emoryi, Quercus engelmannii, Quercus falcata, Quercus gambelii, Quercus garryana, Quercus georgiana, Quercus glaucoides, Quercus gravesii, Quercus grisea, Quercus havardii, Quercus hinckleyi, Quercus hypoleucoides, Quercus ilicifolia, Quercus imbricaria, Quercus incana, Quercus john-tuckeri, Quercus kelloggii, Quercus laevis, Quercus laurifolia, Quercus lobata, Quercus lyrata, Quercus macdonaldii, Quercus macrocarpa, Quercus marilandica, Quercus michauxii, Quercus mohriana, Quercus muehlenbergii, Quercus myrtifolia, Quercus nigra, Quercus nuttallii, Quercus oblongifolia, Quercus oglethorpensis, Quercus palustris, Quercus phellos, Quercus prinus, Quercus pungens, Quercus rubra, Quercus rugosa, Quercus shumardii, Quercus stellata, Quercus tomentella, Quercus toumeyi, Quercus turbinella, Quercus undulata complex, Quercus velutina, Quercus virginiana, Quercus wislizeni |
| QUERCUS EAST | 7313 | 34 | revised | With improved digitizing of the original map, the distribution of Quercus graciliformis no longer intersects with any of the 25 km gridpoints. | Quercus alba, Quercus arkansana, Quercus bicolor, Quercus chapmanii, Quercus coccinea, Quercus durandii, Quercus ellipsoidalis, Quercus falcata, Quercus georgiana, Quercus glaucoides, Quercus gravesii, Quercus havardii, Quercus ilicifolia, Quercus imbricaria, Quercus incana, Quercus laevis, Quercus laurifolia, Quercus lyrata, Quercus macrocarpa, Quercus marilandica, Quercus michauxii, Quercus muehlenbergii, Quercus myrtifolia, Quercus nigra, Quercus nuttallii, Quercus oglethorpensis, Quercus palustris, Quercus phellos, Quercus prinus, Quercus rubra, Quercus shumardii, Quercus stellata, Quercus velutina, Quercus virginiana |
| QUERCUS WEST | 1613 | 26 | revised | With improved digitizing of the original map, the distribution of Quercus ajoensis no longer intersects with any of the 25 km gridpoints. | Quercus agrifolia, Quercus arizonica, Quercus chrysolepis, Quercus cornelius-mulleri, Quercus douglasii, Quercus dunnii, Quercus emoryi, Quercus engelmannii, Quercus gambelii, Quercus garryana, Quercus grisea, Quercus hinckleyi, Quercus hypoleucoides, Quercus john-tuckeri, Quercus kelloggii, Quercus lobata, Quercus macdonaldii, Quercus mohriana, Quercus oblongifolia, Quercus pungens, Quercus rugosa, Quercus tomentella, Quercus toumeyi, Quercus turbinella, Quercus undulata complex, Quercus wislizeni |
| QUERCUS CORNELIUS-MULLERI / QUERCUS JOHN-TUCKERI / QUERCUS TURBINELLA | 286 | 3 | new | When Little mapped this taxon in the 1970s, these three species were considered to all be "Quercus turbinella." This group was created to represent that earlier taxonomy, which is what paleobotanists have used in the past. | Quercus cornelius-mulleri, Quercus john-tuckeri, Quercus turbinella |
| STEWARTIA | 221 | 2 | Stewartia malacodendron, Stewartia ovata | ||
| TILIA | 4553 | 3 | The three species in this group are all now considered to be subspecies of Tilia americana, and thus this group is equivalent to the current "Tilia americana" species | Tilia americana, Tilia caroliniana, Tilia heterophylla | |
| TSUGA | 2531 | 4 | Tsuga canadensis, Tsuga caroliniana, Tsuga heterophylla, Tsuga mertensiana | ||
| TSUGA EAST | 1791 | 2 | Tsuga canadensis, Tsuga caroliniana | ||
| TSUGA WEST | 740 | 2 | Tsuga heterophylla, Tsuga mertensiana | ||
| ULMUS | 7950 | 6 | Ulmus alata, Ulmus americana, Ulmus crassifolia, Ulmus rubra, Ulmus serotina, Ulmus thomasii |
U.S. Department of the Interior |
U.S. Geological Survey
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