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Professional Paper 1650–G

Atlas of Relations Between Climatic Parameters and Distributions of Important Trees and Shrubs in North America—Revisions for all Taxa from the United States and Canada and New Taxa from the Western United States

Table 2. Species composing groups. A blue background indicates a new group; a red background indicates a group that has been revised (compared to previous volumes of this atlas). Click on a column name to sort.


Group Number of gridpoints Number of Species Status Notes Species included in the group
ABIES73219  Abies amabilis, Abies balsamea, Abies bracteata, Abies concolor, Abies fraseri, Abies grandis, Abies lasiocarpa, Abies magnifica, Abies procera
ABIES EAST49472  Abies balsamea, Abies fraseri
ABIES WEST23747  Abies amabilis, Abies bracteata, Abies concolor, Abies grandis, Abies lasiocarpa, Abies magnifica, Abies procera
ACER1138813  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 EAST68558 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 WEST19784 Acer negundo is too widespread to include in either the ACER EAST or ACER WEST groups.Acer circinatum, Acer glabrum, Acer grandidentatum, Acer macrophyllum
AESCULUS28896  Aesculus californica, Aesculus glabra, Aesculus octandra, Aesculus parviflora, Aesculus pavia, Aesculus sylvatica
ALNUS133828  Alnus maritima, Alnus oblongifolia, Alnus rhombifolia, Alnus rubra, Alnus rugosa, Alnus serrulata, Alnus sinuata, Alnus tenuifolia
ALNUS EAST101763  Alnus maritima, Alnus rugosa, Alnus serrulata
ALNUS WEST48045  Alnus oblongifolia, Alnus rhombifolia, Alnus rubra, Alnus sinuata, Alnus tenuifolia
ARTEMISIA SUBGENUS TRIDENTATAE20707revised Artemisia arbuscula, Artemisia bigelovii, Artemisia cana, Artemisia nova, Artemisia rigida, Artemisia tridentata, Artemisia tripartita
BETULA166917  Betula alleghaniensis, Betula lenta, Betula nana, Betula nigra, Betula occidentalis, Betula papyrifera, Betula populifolia
CARYA455411  Carya aquatica, Carya cordiformis, Carya floridana, Carya glabra, Carya illinoensis, Carya laciniosa, Carya myristicaeformis, Carya ovata, Carya pallida, Carya texana, Carya tomentosa
CASTANEA22254  Castanea alnifolia, Castanea dentata, Castanea ozarkensis, Castanea pumila
CUPRESSACEAE EAST69896revisedAdded Chamaecyparis thyoides (excluded by error in 1650-A).Chamaecyparis thyoides, Juniperus ashei, Juniperus silicicola, Juniperus virginiana, Taxodium distichum, Thuja occidentalis
CUPRESSACEAE / TAXACEAE1858132revisedAdded 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 EAST81449revised 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 WEST252221revisedAdded 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 GANDERI2592newThese 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
FRAXINUS930415revisedRemapped 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 EAST85566  Fraxinus americana, Fraxinus caroliniana, Fraxinus nigra, Fraxinus pennsylvanica, Fraxinus profunda, Fraxinus quadrangulata
FRAXINUS WEST7749revisedRemapped Fraxinus anomala.Fraxinus anomala, Fraxinus berlandieriana, Fraxinus cuspidata, Fraxinus dipetala, Fraxinus greggii, Fraxinus latifolia, Fraxinus papillosa, Fraxinus texensis, Fraxinus velutina
HESPEROYUCCA1152newThese two species together form a group equivalent to what was considered Yucca whipplei.Hesperoyucca newberryi, Hesperoyucca whipplei
JUGLANS42475revisedRemoved Juglans hindsii (which no longer has any grid points following improved digitizing).Juglans californica, Juglans cinerea, Juglans major, Juglans microcarpa, Juglans nigra
JUGLANS EAST41092  Juglans cinerea, Juglans nigra
JUGLANS WEST1413revisedRemoved Juglans hindsii (which no longer has any grid points following improved digitizing).Juglans californica, Juglans major, Juglans microcarpa
JUNIPERUS1698114revisedJuniperus 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 BOREAL115702  Juniperus communis, Juniperus horizontalis
JUNIPERUS EAST44493  Juniperus ashei, Juniperus silicicola, Juniperus virginiana
JUNIPERUS WEST17549revisedJuniperus 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 CALIFORNICA10216revisedJuniperus erythrocarpa was added to the group.Juniperus californica, Juniperus erythrocarpa, Juniperus monosperma, Juniperus occidentalis, Juniperus osteosperma, Juniperus pinchotii
JUNIPERUS WEST WOODLAND without JUNIPERUS CALIFORNICA8985newThis 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)3553newThe taxonomy of these closely related species has changed through time, and this group was created for paleobotanical analyses.Juniperus erythrocarpa, Juniperus monosperma, Juniperus pinchotii
LARIX90533  Larix laricina, Larix lyallii, Larix occidentalis
LARIX / PSEUDOTSUGA103515  Larix laricina, Larix lyallii, Larix occidentalis, Pseudotsuga macrocarpa, Pseudotsuga menziesii
MAGNOLIA18158  Magnolia acuminata, Magnolia ashei, Magnolia fraseri, Magnolia grandiflora, Magnolia macrophylla, Magnolia pyramidata, Magnolia tripetala, Magnolia virginiana
MORTONIA1023newThe 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 / CARPINUS49213  Carpinus caroliniana, Ostrya knowltonii, Ostrya virginiana
PICEA121127  Picea breweriana, Picea engelmannii, Picea glauca, Picea mariana, Picea pungens, Picea rubens, Picea sitchensis
PICEA NORTH / EAST109653  Picea glauca, Picea mariana, Picea rubens
PICEA WEST15054  Picea breweriana, Picea engelmannii, Picea pungens, Picea sitchensis
PICEA WEST INTERIOR10912  Picea engelmannii, Picea pungens
PINUS1165535revisedSpecies 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 EAST815313  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 NORTHEAST65214  Pinus banksiana, Pinus resinosa, Pinus rigida, Pinus strobus
PINUS NORTHEAST YELLOW59953  Pinus banksiana, Pinus resinosa, Pinus rigida
PINUS SOUTHEAST21529  Pinus clausa, Pinus echinata, Pinus elliottii, Pinus glabra, Pinus palustris, Pinus pungens, Pinus serotina, Pinus taeda, Pinus virginiana
PINUS WEST363821revisedPinus 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 PINYONS5274  Pinus cembroides, Pinus edulis, Pinus monophylla, Pinus quadrifolia
PINUS WEST PINYONS (NORTHERN)4842newThere are several confusing issues on the taxonomy of Pinus monophylla vs. Pinus edulis var. fallax and paleobotanists may want to treat these two species togetherPinus edulis, Pinus monophylla
PINUS WEST WHITE (EXCLUDING PINYON PINES)12688  Pinus albicaulis, Pinus aristata, Pinus balfouriana, Pinus flexilis, Pinus lambertiana, Pinus longaeva, Pinus monticola, Pinus strobiformis
PINUS WEST YELLOW30189revisedPinus washoensis was added to the group.Pinus attenuata, Pinus contorta, Pinus coulteri, Pinus engelmannii, Pinus jeffreyi, Pinus leiophylla, Pinus ponderosa, Pinus sabiniana, Pinus washoensis
PLATANUS39493  Platanus occidentalis, Platanus racemosa, Platanus wrightii
POPULUS181629  Populus angustifolia, Populus balsamifera, Populus deltoides, Populus fremontii, Populus grandidentata, Populus heterophylla, Populus hinckleyana, Populus tremuloides, Populus trichocarpa
PROSOPIS19433new Prosopis glandulosa, Prosopis pubescens, Prosopis velutina
PROSOPIS GLANDULOSA / PROSOPIS VELUTINA19392new Prosopis glandulosa, Prosopis velutina
PSEUDOTSUGA15542  Pseudotsuga macrocarpa, Pseudotsuga menziesii
QUERCUS885760revisedWith 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 EAST731334revisedWith 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 WEST161326revisedWith 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 TURBINELLA2863newWhen 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
STEWARTIA2212  Stewartia malacodendron, Stewartia ovata
TILIA45533 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" speciesTilia americana, Tilia caroliniana, Tilia heterophylla
TSUGA25314  Tsuga canadensis, Tsuga caroliniana, Tsuga heterophylla, Tsuga mertensiana
TSUGA EAST17912  Tsuga canadensis, Tsuga caroliniana
TSUGA WEST7402  Tsuga heterophylla, Tsuga mertensiana
ULMUS79506  Ulmus alata, Ulmus americana, Ulmus crassifolia, Ulmus rubra, Ulmus serotina, Ulmus thomasii


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