Maps of the ranges of tree species in North America compiled by Elbert Little, of the U.S. Department of Agriculture, Forest Service, and others (see references below) were digitized for use in USGS' vegetation-climate modeling studies. These digital map files are available here for download.The maps are available in ArcView® shapefile format. Geographic ranges are represented as polygons. There is one shapefile (with associated data files) for each tree species. At present, not all of the maps have been digitized, quality checked, and made available here, but we plan to make most or all of the digitized maps available over time.
NOTE ABOUT SCIENTIFIC NAMES: We are aware that the scientific names of some taxa have changed since these atlases were published. Because our intent is to digitally reproduce the maps in their original form, we refer to each tree species by the scientific name as published in the original reference.
Little, E.L., Jr., 1971, Atlas of United States trees, volume 1, conifers and important hardwoods: U.S. Department of Agriculture Miscellaneous Publication 1146, 9 p., 200 maps.
Little, E.L., Jr., 1976, Atlas of United States trees, volume 3, minor Western hardwoods: U.S. Department of Agriculture Miscellaneous Publication 1314, 13 p., 290 maps.
Little, E.L., Jr., 1977, Atlas of United States trees, volume 4, minor Eastern hardwoods: U.S. Department of Agriculture Miscellaneous Publication 1342, 17 p., 230 maps.
Little, E.L., Jr. 1978, Atlas of United States trees, volume 5, Florida: U.S. Department of Agriculture Miscellaneous Publication 1361, 262 maps.
AVAILABLE FILE FORMATS
A PDF graphic file of the map is available for viewing purposes. Use the free Acrobat Reader program to view.
ArcView shapefiles of the distributions are contained in a ZIP file (.ZIP). Use WinZip, PKZip, or similar program to extract in MS Windows; use Stuffit Expander or similar to unzip on Macintosh; Use UnZip or similar program to extract on UNIX computers.
BASEMAP SHAPEFILES
ArcView Shapefiles of the basemaps used to create the graphic representations of
the maps are not available for download here. Projection information is available in the metadata.
NOTICE: Use of trade names does not imply endorsement by the USGS or the U.S. Federal Government.
| ZIP | Latin Name | Common Name | Reference | Original Map No(s). | |
|---|---|---|---|---|---|
| Graphic(PDF) | Shapefiles | Abies amabilis | Pacific silver fir | Little (1971) | 1-W, 1-N |
| Graphic(PDF) | Shapefiles | Abies balsamea | balsam fir | Little (1971) | 2-N, 2-E |
| Graphic(PDF) | Shapefiles | Abies bracteata | bristlecone fir | Little (1971) | 3-W |
| Graphic(PDF) | Shapefiles | Abies concolor | white fir | Little (1971) | 5-W |
| Graphic(PDF) | Shapefiles | Abies fraseri | Fraser fir | Little (1971) | 4-E |
| Graphic(PDF) | Shapefiles | Abies grandis | grand fir | Little (1971) | 6-W |
| Graphic(PDF) | Shapefiles | Abies lasiocarpa | subalpine fir | Little (1971) | 7-W, 7-N |
| Graphic(PDF) | Shapefiles | Abies magnifica | California red fir | Little (1971) | 8-W |
| Graphic(PDF) | Shapefiles | Abies procera | noble fir | Little (1971) | 9-W |
| Graphic(PDF) | Shapefiles | Acacia berlandieri | Berlandier acacia | Little (1976) | 1-N, 1-SW |
| Graphic(PDF) | Shapefiles | Acacia choriophylla | cinnecord | Little (1978) | 159 |
| Graphic(PDF) | Shapefiles | Acacia farnesiana | sweet acacia | Little (1976) | 2 |
| Graphic(PDF) | Shapefiles | Acacia greggii | catclaw acacia | Little (1976) | 3 |
| Graphic(PDF) | Shapefiles | Acacia macracantha | long spine acacia | Little (1978) | 160 |
| Graphic(PDF) | Shapefiles | Acacia rigidula | blackbrush acacia | Little (1976) | 4 |
| Graphic(PDF) | Shapefiles | Acacia roemeriana | Roemer acacia | Little (1976) | 5 |
| Graphic(PDF) | Shapefiles | Acacia tortuosa | twisted acacia | Little (1976) | 6-N, 6-SW |
| Graphic(PDF) | Shapefiles | Acacia wrightii | Wright acacia | Little (1976) | 7 |
| Graphic(PDF) | Shapefiles | Acer barbatum | Florida maple | Little (1977) | 1 |
| Graphic(PDF) | Shapefiles | Acer circinatum | vine maple | Little (1976) | 8 |
| Graphic(PDF) | Shapefiles | Acer glabrum | Rocky Mountain maple | Little (1976) | 9-N, 9-W |
| Graphic(PDF) | Shapefiles | Acer grandidentatum | bigtooth maple | Little (1976) | 10 |
| Graphic(PDF) | Shapefiles | Acer leucoderme | chalk maple | Little (1977) | 2 |
| Graphic(PDF) | Shapefiles | Acer macrophyllum | bigleaf maple | Little (1971) | 95-W, 95-N |
| Graphic(PDF) | Shapefiles | Acer negundo | boxelder | Little (1971) | 96-W, 96-E, 96-N |
| Graphic(PDF) | Shapefiles | Acer nigrum | black maple | Little (1971) | 97-E |
| Graphic(PDF) | Shapefiles | Acer pensylvanicum | striped maple | Little (1977) | 3-N, 3-NE |
| Graphic(PDF) | Shapefiles | Acer rubrum | red maple | Little (1971) | 98-N, 98-E |
| Graphic(PDF) | Shapefiles | Acer saccharinum | silver maple | Little (1971) | 101-E |
| Graphic(PDF) | Shapefiles | Acer saccharum | sugar maple | Little (1971) | 99-N, 99-E |
| Graphic(PDF) | Shapefiles | Acer spicatum | mountain maple | Little (1977) | 4-N, 4-NE |
| Graphic(PDF) | Shapefiles | Acoelorrhaphe wrightii | paurotis palm | Little (1978) | 161 |
| Graphic(PDF) | Shapefiles | Aesculus californica | California buckeye | Little (1976) | 11 |
| Graphic(PDF) | Shapefiles | Aesculus glabra | Ohio buckeye | Little (1971) | 102-E |
| Graphic(PDF) | Shapefiles | Aesculus octandra | yellow buckeye | Little (1971) | 103-E |
| Graphic(PDF) | Shapefiles | Aesculus parviflora | bottlebrush buckeye | Little (1977) | 5 |
| Graphic(PDF) | Shapefiles | Aesculus pavia | red buckeye | Little (1977) | 6 |
| Graphic(PDF) | Shapefiles | Aesculus sylvatica | painted buckeye | Little (1977) | 7 |
| Graphic(PDF) | Shapefiles | Agave utahensis | Utah agave | Benson and Darrow (1981) | 3.16 |
| Graphic(PDF) | Shapefiles | Alnus maritima | seaside alder | Little (1977) | 8 |
| Graphic(PDF) | Shapefiles | Alnus oblongifolia | Arizona alder | Little (1976) | 12 |
| Graphic(PDF) | Shapefiles | Alnus rhombifolia | white alder | Little (1976) | 13 |
| Graphic(PDF) | Shapefiles | Alnus rubra | red alder | Little (1971) | 104-W, 104-N |
| Graphic(PDF) | Shapefiles | Alnus rugosa | speckled alder | Little (1977) | 9-N, 9-NE |
| Graphic(PDF) | Shapefiles | Alnus serrulata | hazel alder | Little (1977) | 10-NE, 10-SE, 10-N |
| Graphic(PDF) | Shapefiles | Alnus sinuata | Sitka alder | Little (1976) | 14-N, 14-W |
| Graphic(PDF) | Shapefiles | Alnus tenuifolia | thinleaf alder | Little (1976) | 15-N, 15-W |
| Graphic(PDF) | Shapefiles | Alvaradoa amorphoides | Mexican alvaradoa | Little (1978) | 162 |
| Graphic(PDF) | Shapefiles | Amelanchier alnifolia | western serviceberry | Little (1976) | 16-N, 16-NW |
| Graphic(PDF) | Shapefiles | Amelanchier arborea | downy serviceberry | Little (1977) | 11-N, 11-NE, 11-SE |
| Graphic(PDF) | Shapefiles | Amelanchier interior | inland serviceberry | Little (1977) | 13 |
| Graphic(PDF) | Shapefiles | Amelanchier sanguinea | roundleaf serviceberry | Little (1977) | 14 |
| Graphic(PDF) | Shapefiles | Amelanchier utahensis | Utah serviceberry | Little (1976) | 17 |
| Graphic(PDF) | Shapefiles | Amphitecna latifolia | black calabash | Little (1978) | 163 |
| Graphic(PDF) | Shapefiles | Amyris balsamifera | balsam torchwood | Little (1978) | 164 |
| Graphic(PDF) | Shapefiles | Amyris elemifera | torchwood | Little (1978) | 165 |
| Graphic(PDF) | Shapefiles | Annona glabra | pond apple | Little (1978) | 166 |
| Graphic(PDF) | Shapefiles | Aralia spinosa | devils walkingstick | Little (1977) | 15 |
| Graphic(PDF) | Shapefiles | Arbutus arizonica | Arizona madrone | Little (1976) | 18 |
| Graphic(PDF) | Shapefiles | Arbutus menziesii | Pacific madrone | Little (1971) | 100-W |
| Graphic(PDF) | Shapefiles | Arbutus texana | Texas madrone | Little (1976) | 19 |
| Graphic(PDF) | Shapefiles | Arctostaphylos pringlei | Pringle manzanita | Little (1976) | 20 |
| Graphic(PDF) | Shapefiles | Ardisia escallonioides | marlberry | Little (1978) | 167 |
| Graphic(PDF) | Shapefiles | Artemisia tridentata | big sagebrush | Little (1976) | 21-NW, 21-SW |
| Graphic(PDF) | Shapefiles | Asimina parviflora | smallflower pawpaw | Little (1978) | 158.5 |
| Graphic(PDF) | Shapefiles | Asimina triloba | pawpaw | Little (1977) | 16 |
| Graphic(PDF) | Shapefiles | Avicennia germinans | black mangrove | Little (1977, 1978) | 17-N,17-SE, 168 |
| Graphic(PDF) | Shapefiles | Baccharis halimifolia | eastern baccharis | Little (1977) | 18-NE, 18-SE |
| Graphic(PDF) | Shapefiles | Betula alleghaniensis | yellow birch | Little (1971) | 105-N, 105-E |
| Graphic(PDF) | Shapefiles | Betula lenta | sweet birch | Little (1971) | 106-E |
| Graphic(PDF) | Shapefiles | Betula nana | dwarf birch | Little (1975) | 34 |
| Graphic(PDF) | Shapefiles | Betula nigra | river birch | Little (1971) | 110-E |
| Graphic(PDF) | Shapefiles | Betula occidentalis | water birch | Little (1976) | 22-N, 22-NW |
| Graphic(PDF) | Shapefiles | Betula papyrifera | paper birch | Little (1971) | 107-N, 107-W, 107-E |
| Graphic(PDF) | Shapefiles | Betula populifolia | gray birch | Little (1971) | 108-N, 108-E |
| Graphic(PDF) | Shapefiles | Betula uber | Ashe birch | Little (1977) | 19 |
| Graphic(PDF) | Shapefiles | Bourreria ovata | Bahama strongbark | Little (1978) | 169 |
| Graphic(PDF) | Shapefiles | Bourreria radula | rough strongbark | Little (1978) | 170 |
| Graphic(PDF) | Shapefiles | Bumelia celastrina | saffron plum | Little (1976, 1978) | 23-N, 23-SW, 171 |
| Graphic(PDF) | Shapefiles | Bumelia lanuginosa | gum bumelia | Little (1976, 1977) | 24, 20 |
| Graphic(PDF) | Shapefiles | Bumelia lycioides | buckthorn bumelia | Little (1977) | 21 |
| Graphic(PDF) | Shapefiles | Bumelia tenax | tough bumelia | Little (1977) | 22 |
| Graphic(PDF) | Shapefiles | Bursera fagaroides | fragrant bursera | Little (1976) | 26-N, 26-SW |
| Graphic(PDF) | Shapefiles | Bursera microphylla | elephanttree | Little (1976) | 25 |
| Graphic(PDF) | Shapefiles | Bursera simaruba | gumbo limbo | Little (1978) | 172 |
| Graphic(PDF) | Shapefiles | Byrsonima lucida | key byrsonima | Little (1978) | 173 |
| Graphic(PDF) | Shapefiles | Caesalpinia mexicana | Mexican poinciana | Little (1976) | 27-N, 27-SW |
| Graphic(PDF) | Shapefiles | Calyptranthes pallens | pale lidflower | Little (1978) | 174 |
| Graphic(PDF) | Shapefiles | Calyptranthes zuzygium | myrtle of the river | Little (1978) | 175 |
| Graphic(PDF) | Shapefiles | Canella winterana | canella | Little (1978) | 176 |
| Graphic(PDF) | Shapefiles | Canotia holacantha | canotia | Little (1976) | 28 |
| Graphic(PDF) | Shapefiles | Capparis cynophallophora | Jamaica caper | Little (1978) | 177 |
| Graphic(PDF) | Shapefiles | Capparis flexuosa | limber caper | Little (1978) | 178 |
| Graphic(PDF) | Shapefiles | Carpinus caroliniana | American hornbeam | Little (1971) | 109-N, 109-E |
| Graphic(PDF) | Shapefiles | Carya aquatica | water hickory | Little (1971) | 111-E |
| Graphic(PDF) | Shapefiles | Carya cordiformis | bitternut hickory | Little (1971) | 112-E |
| Graphic(PDF) | Shapefiles | Carya floridana | scrub hickory | Little (1977) | 23 |
| Graphic(PDF) | Shapefiles | Carya glabra | pignut hickory | Little (1971) | 113-E |
| Graphic(PDF) | Shapefiles | Carya illinoensis | pecan | Little (1971) | 114-W, 114-E, 114-N |
| Graphic(PDF) | Shapefiles | Carya laciniosa | shellbark hickory | Little (1971) | 115-E |
| Graphic(PDF) | Shapefiles | Carya myristicaeformis | nutmeg hickory | Little (1971) | 116-E |
| Graphic(PDF) | Shapefiles | Carya ovata | shagbark hickory | Little (1971) | 118-N, 118-E |
| Graphic(PDF) | Shapefiles | Carya pallida | sand hickory | Little (1977) | 24 |
| Graphic(PDF) | Shapefiles | Carya texana | black hickory | Little (1977) | 25 |
| Graphic(PDF) | Shapefiles | Carya tomentosa | mockernut hickory | Little (1971) | 117-E |
| Graphic(PDF) | Shapefiles | Castanea alnifolia | Florida chinkapin | Little (1977) | 26 |
| Graphic(PDF) | Shapefiles | Castanopsis chrysophylla | golden chinkapin | Little (1971) | 119-W |
| Graphic(PDF) | Shapefiles | Castanea dentata | American chestnut | Little (1977) | 27-NE, 27-SE |
| Graphic(PDF) | Shapefiles | Castanea ozarkensis | Ozark chinkapin | Little (1977) | 28 |
| Graphic(PDF) | Shapefiles | Castanea pumila | Allegheny chinkapin | Little (1977) | 29 |
| Graphic(PDF) | Shapefiles | Catalpa bignonioides | southern catalpa | Little (1977) | 30 |
| Graphic(PDF) | Shapefiles | Catalpa speciosa | northern catalpa | Little (1971) | 120-E |
| Graphic(PDF) | Shapefiles | Ceanothus arboreus | feltleaf ceanothus | Little (1976) | 29 |
| Graphic(PDF) | Shapefiles | Ceanothus spinosus | spiny ceanothus | Little (1976) | 30 |
| Graphic(PDF) | Shapefiles | Ceanothus thyrsiflorus | blueblossom | Little (1976) | 31 |
| Graphic(PDF) | Shapefiles | Celtis laevigata | sugarberry | Little (1971) | 122-W, 122-E, 122-N |
| Graphic(PDF) | Shapefiles | Celtis lindheimeri | Lindheimer hackberry | Little (1976) | 32 |
| Graphic(PDF) | Shapefiles | Celtis occidentalis | hackberry | Little (1971) | 121-W, 121-E |
| Graphic(PDF) | Shapefiles | Celtis reticulata | netleaf hackberry | Little (1976) | 33-N, 33-NW, 33-SW |
| Graphic(PDF) | Shapefiles | Celtis tenuifolia | Georgia hackberry | Little (1977) | 31 |
| Graphic(PDF) | Shapefiles | Cephalanthus occidentalis | common buttonbush | Little (1976, 1977) | 34-NW, 34-SW, 34-N, 32-NE, 32-SE,32-N |
| Graphic(PDF) | Shapefiles | Cercocarpus betuloides | birchleaf cercocarpus | Little (1976) | 40 |
| Graphic(PDF) | Shapefiles | Cercocarpus breviflorus | hairy cercocarpus | Little (1976) | 41 |
| Graphic(PDF) | Shapefiles | Cercis canadensis | eastern redbud | Little (1976, 1977) | 38-N, 38-SW, 33-N, 33-NE, 33-SE |
| Graphic(PDF) | Shapefiles | Cercidium floridum | blue paloverde | Little (1976) | 35 |
| Graphic(PDF) | Shapefiles | Cercocarpus ledifolius | curlleaf cercocarpus | Little (1976) | 42 |
| Graphic(PDF) | Shapefiles | Cercidium macrum | border paloverde | Little (1976) | 36 |
| Graphic(PDF) | Shapefiles | Cercidium microphyllum | yellow paloverde | Little (1976) | 37 |
| Graphic(PDF) | Shapefiles | Cercis occidentalis | California redbud | Little (1976) | 39 |
| Graphic(PDF) | Shapefiles | Cercocarpus traskiae | Catalina cercocarpus | Little (1976) | 43 |
| Graphic(PDF) | Shapefiles | Cereus giganteus | saguaro | Little (1976) | 44 |
| Graphic(PDF) | Shapefiles | Cereus robinii | key tree cactus | Little (1978) | 179 |
| Graphic(PDF) | Shapefiles | Chamaecyparis lawsoniana | Port Orford cedar | Little (1971) | 10-W |
| Graphic(PDF) | Shapefiles | Chamaecyparis nootkatensis | Alaska cedar | Little (1971) | 12-W, 12-N |
| Graphic(PDF) | Shapefiles | Chamaecyparis thyoides | Atlantic white cedar | Little (1971) | 11-E |
| Graphic(PDF) | Shapefiles | Chilopsis linearis | desert willow | Little (1976) | 49 |
| Graphic(PDF) | Shapefiles | Chionanthus virginicus | fringetree | Little (1977) | 34 |
| Graphic(PDF) | Shapefiles | Chrysobalanus icaco | cocoplum | Little (1978) | 180 |
| Graphic(PDF) | Shapefiles | Chrysophyllum oliviforme | satinleaf | Little (1978) | 181 |
| Graphic(PDF) | Shapefiles | Citharexylum berlandieri | Berlandier fiddlewood | Little (1976) | 45-N, 45-SW |
| Graphic(PDF) | Shapefiles | Citharexylum fruticosum | Florida fiddlewood | Little (1978) | 182 |
| Graphic(PDF) | Shapefiles | Cladrastis kentukea | yellowwood | Little (1977) | 35 |
| Graphic(PDF) | Shapefiles | Clethra acuminata | cinnamon clethra | Little (1977) | 36 |
| Graphic(PDF) | Shapefiles | Cliftonia monophylla | buckwheat tree | Little (1977) | 37 |
| Graphic(PDF) | Shapefiles | Clusia rosea | Florida clusia | Little (1978) | 183 |
| Graphic(PDF) | Shapefiles | Coccothrinax argentata | Florida silverpalm | Little (1978) | 186 |
| Graphic(PDF) | Shapefiles | Coccoloba diversifolia | pigeon plum | Little (1978) | 184 |
| Graphic(PDF) | Shapefiles | Coccoloba uvifera | seagrape | Little (1978) | 185 |
| Graphic(PDF) | Shapefiles | Colubrina arborescens | coffee colubrina | Little (1978) | 187 |
| Graphic(PDF) | Shapefiles | Colubrina cubensis | Cuba colubrina | Little (1978) | 188 |
| Graphic(PDF) | Shapefiles | Colubrina elliptica | soldierwood | Little (1978) | 189 |
| Graphic(PDF) | Shapefiles | Condalia globosa | bitter condalia | Little (1976) | 46 |
| Graphic(PDF) | Shapefiles | Condalia hookeri | bluewood | Little (1976) | 47 |
| Graphic(PDF) | Shapefiles | Conocarpus erectus | button mangrove | Little (1978) | 190 |
| Graphic(PDF) | Shapefiles | Cordia boissieri | anacahuita | Little (1976) | 48-N, 48-SW |
| Graphic(PDF) | Shapefiles | Cordia sebestena | Geiger tree | Little (1978) | 191 |
| Graphic(PDF) | Shapefiles | Cornus alternifolia | alternate leaf dogwood | Little (1977) | 38-NE,38-SE,38-N |
| Graphic(PDF) | Shapefiles | Cornus drummondii | roughleaf dogwood | Little (1977) | 39 |
| Graphic(PDF) | Shapefiles | Cornus florida | flowering dogwood | Little (1971) | 124-N, 124-E |
| Graphic(PDF) | Shapefiles | Cornus glabrata | brown dogwood | Little (1976) | 50 |
| Graphic(PDF) | Shapefiles | Cornus nuttallii | Pacific dogwood | Little (1976) | 51-NW, 51-SW |
| Graphic(PDF) | Shapefiles | Cornus occidentalis | western dogwood | Little (1976) | 52 |
| Graphic(PDF) | Shapefiles | Cornus racemosa | gray dogwood | Little (1977) | 41 |
| Graphic(PDF) | Shapefiles | Cornus rugosa | roundleaf dogwood | Little (1977) | 40-NE, 40-N |
| Graphic(PDF) | Shapefiles | Cornus sessilis | blackfruit dogwood | Little (1976) | 56 |
| Graphic(PDF) | Shapefiles | Cornus stolonifera | red osier dogwood | Little (1977) | 43-N, 43-NE |
| Graphic(PDF) | Shapefiles | Cornus stricta | stiffcornel dogwood | Little (1977) | 42 |
| Graphic(PDF) | Shapefiles | Corylus cornuta | beaked hazel | Little (1977) | 44-N, 44-NE |
| Graphic(PDF) | Shapefiles | Cotinus obovatus | American smoketree | Little (1977) | 46 |
| Graphic(PDF) | Shapefiles | Cowania mexicana | cliffrose | Little (1976) | 55-N, 55-SW |
| Graphic(PDF) | Shapefiles | Crataegus chrysocarpa | fireberry hawthorn | Little (1976) | 57 |
| Graphic(PDF) | Shapefiles | Crataegus columbiana | Columbia hawthorn | Little (1976) | 58-N, 58-NW |
| Graphic(PDF) | Shapefiles | Crataegus douglasii | black hawthorn | Little (1976) | 59-N, 59-NW |
| Graphic(PDF) | Shapefiles | Crataegus erythropoda | Cerro hawthorn | Little (1976) | 60 |
| Graphic(PDF) | Shapefiles | Crataegus saligna | willow hawthorn | Little (1976) | 61 |
| Graphic(PDF) | Shapefiles | Crataegus succulenta | fleshy hawthorn | Little (1976) | 62 |
| Graphic(PDF) | Shapefiles | Crataegus tracyi | Tracy hawthorn | Little (1976) | 63 |
| Graphic(PDF) | Shapefiles | Crossopetalum rhacoma | Florida crossopetalum | Little (1978) | 192 |
| Graphic(PDF) | Shapefiles | Cupania glabra | Florida cupania | Little (1978) | 193 |
| Graphic(PDF) | Shapefiles | Cupressus arizonica | Arizona cypress | Little (1971) | 13-W |
| Graphic(PDF) | Shapefiles | Cupressus bakeri | Modoc cypress | Little (1971) | 14-W |
| Graphic(PDF) | Shapefiles | Cupressus goveniana | Gowen cypress | Little (1971) | 15-W |
| Graphic(PDF) | Shapefiles | Cupressus guadalupensis | Tecate cypress | Little (1971) | 16-W |
| Graphic(PDF) | Shapefiles | Cupressus macnabiana | MacNab cypress | Little (1971) | 17-W |
| Graphic(PDF) | Shapefiles | Cupressus macrocarpa | Monterey cypress | Little (1971) | 18-W |
| Graphic(PDF) | Shapefiles | Cupressus sargentii | Sargent cypress | Little (1971) | 19-W |
| Graphic(PDF) | Shapefiles | Cyrilla racemiflora | swamp cyrilla | Little (1977) | 45-SE, 45-N |
| Graphic(PDF) | Shapefiles | Dalea spinosa | smokethorn | Little (1976) | 64 |
| Graphic(PDF) | Shapefiles | Diospyros texana | Texas persimmon | Little (1976) | 65 |
| Graphic(PDF) | Shapefiles | Diospyros virginiana | common persimmon | Little (1971) | 123-E |
| Graphic(PDF) | Shapefiles | Dipholis salicifolia | willow bustic | Little (1978) | 194 |
| Graphic(PDF) | Shapefiles | Dodonaea viscosa | hopbush | Little (1976, 1978) | 66-N, 66-SW,195 |
| Graphic(PDF) | Shapefiles | Drypetes diversifolia | milkbark | Little (1978) | 196 |
| Graphic(PDF) | Shapefiles | Drypetes lateriflora | Guiana plum | Little (1978) | 197 |
| Graphic(PDF) | Shapefiles | Ehretia anacua | anaqua | Little (1976) | 67-N, 67-SW |
| Graphic(PDF) | Shapefiles | Elliottia racemosa | elliottia | Little (1977) | 47 |
| Graphic(PDF) | Shapefiles | Erythrina flabelliformis | southwestern coralbean | Little (1976) | 68-N, 68-SW |
| Graphic(PDF) | Shapefiles | Erythrina herbacea | eastern coralbean | Little (1977) | 48-SE, 48-N |
| Graphic(PDF) | Shapefiles | Esenbeckia berlandieri | Berlandier esenbeckia | Little (1976) | 69-N, 69-SW |
| Graphic(PDF) | Shapefiles | Eugenia axillaris | white stopper | Little (1978) | 198 |
| Graphic(PDF) | Shapefiles | Eugenia confusa | redberry stopper | Little (1978) | 199 |
| Graphic(PDF) | Shapefiles | Eugenia foetida | boxleaf stopper | Little (1978) | 200 |
| Graphic(PDF) | Shapefiles | Eugenia rhombea | red stopper | Little (1978) | 201 |
| Graphic(PDF) | Shapefiles | Euonymus atropurpureus | eastern wahoo | Little (1977) | 49-NE, 49-SE |
| Graphic(PDF) | Shapefiles | Euonymus occidentalis | western wahoo | Little (1976) | 70 |
| Graphic(PDF) | Shapefiles | Exostema caribaeum | princewood | Little (1978) | 202 |
| Graphic(PDF) | Shapefiles | Exothea paniculata | inkwood | Little (1978) | 203 |
| Graphic(PDF) | Shapefiles | Eysenhardtia polystachya | kidneywood | Little (1976) | 72-N, 72-W |
| Graphic(PDF) | Shapefiles | Eysenhardtia texana | Texas kidneywood | Little (1976) | 71 |
| Graphic(PDF) | Shapefiles | Fagus grandifolia | American beech | Little (1971) | 125-N, 125-E |
| Graphic(PDF) | Shapefiles | Ficus aurea | Florida strangler fig | Little (1978) | 204 |
| Graphic(PDF) | Shapefiles | Ficus citrifolia | shortleaf fig | Little (1978) | 205 |
| Graphic(PDF) | Shapefiles | Forestiera acuminata | swamp privet | Little (1977) | 50 |
| Graphic(PDF) | Shapefiles | Forestiera angustifolia | Texas forestiera | Little (1976) | 73-N, 73-W |
| Graphic(PDF) | Shapefiles | Forestiera phillyreoides | desert olive forestiera | Little (1976) | 74 |
| Graphic(PDF) | Shapefiles | Forestiera segregata | Florida privet | Little (1977) | 51 |
| Graphic(PDF) | Shapefiles | Franklinia alatamaha | franklinia | Little (1977) | 52 |
| Graphic(PDF) | Shapefiles | Fraxinus americana | white ash | Little (1971) | 126-N, 126-E |
| Graphic(PDF) | Shapefiles | Fraxinus anomala | singleleaf ash | Little (1976) | 75 |
| Graphic(PDF) | Shapefiles | Fraxinus berlandieriana | Berlandier ash | Little (1976) | 76 |
| Graphic(PDF) | Shapefiles | Fraxinus caroliniana | Carolina ash | Little (1977) | 53 |
| Graphic(PDF) | Shapefiles | Fraxinus cuspidata | fragrant ash | Little (1976) | 77 |
| Graphic(PDF) | Shapefiles | Fraxinus dipetala | two petal ash | Little (1976) | 78 |
| Graphic(PDF) | Shapefiles | Fraxinus gooddingii | Goodding ash | Little (1976) | 79 |
| Graphic(PDF) | Shapefiles | Fraxinus greggii | Gregg ash | Little (1976) | 80-N, 80-SW |
| Graphic(PDF) | Shapefiles | Fraxinus latifolia | Oregon ash | Little (1971) | 127-W |
| Graphic(PDF) | Shapefiles | Fraxinus nigra | black ash | Little (1971) | 129-N, 129-E |
| Graphic(PDF) | Shapefiles | Fraxinus papillosa | Chihuahua ash | Little (1976) | 81 |
| Graphic(PDF) | Shapefiles | Fraxinus pennsylvanica | green ash | Little (1971) | 130-W, 130-E, 130-N |
| Graphic(PDF) | Shapefiles | Fraxinus profunda | pumpkin ash | Little (1977) | 54 |
| Graphic(PDF) | Shapefiles | Fraxinus quadrangulata | blue ash | Little (1971) | 128-E |
| Graphic(PDF) | Shapefiles | Fraxinus texensis | Texas ash | Little (1976) | 82 |
| Graphic(PDF) | Shapefiles | Fraxinus velutina | velvet ash | Little (1976) | 83 |
| Graphic(PDF) | Shapefiles | Fremontodendron californicum | California fremontia | Little (1976) | 84 |
| Graphic(PDF) | Shapefiles | Fremontodendron mexicanum | Mexican fremontia | Little (1976) | 85 |
| Graphic(PDF) | Shapefiles | Garrya elliptica | wavyleaf silktassel | Little (1976) | 86 |
| Graphic(PDF) | Shapefiles | Genipa clusiifolia | seven year apple | Little (1978) | 206 |
| Graphic(PDF) | Shapefiles | Gleditsia aquatica | waterlocust | Little (1977) | 55 |
| Graphic(PDF) | Shapefiles | Gleditsia triacanthos | honeylocust | Little (1971) | 132-W, 132-E |
| Graphic(PDF) | Shapefiles | Gordonia lasianthus | loblolly bay | Little (1977) | 56 |
| Graphic(PDF) | Shapefiles | Guaiacum angustifolium | Texas lignumvitae | Little (1976) | 87 |
| Graphic(PDF) | Shapefiles | Guaiacum sanctum | roughbark lignumvitae | Little (1978) | 207 |
| Graphic(PDF) | Shapefiles | Guapira discolor | blolly | Little (1978) | 208 |
| Graphic(PDF) | Shapefiles | Guettarda elliptica | elliptic leaf velvetseed | Little (1978) | 209 |
| Graphic(PDF) | Shapefiles | Guettarda scabra | roughleaf velvetseed | Little (1978) | 210 |
| Graphic(PDF) | Shapefiles | Gyminda latifolia | falsebox | Little (1978) | 211 |
| Graphic(PDF) | Shapefiles | Gymnocladus dioicus | Kentucky coffeetree | Little (1977) | 57 |
| Graphic(PDF) | Shapefiles | Gymnanthes lucida | oysterwood | Little (1978) | 212 |
| Graphic(PDF) | Shapefiles | Halesia carolina | Carolina silverbell | Little (1977) | 58 |
| Graphic(PDF) | Shapefiles | Halesia diptera | two wing silverbell | Little (1977) | 59 |
| Graphic(PDF) | Shapefiles | Halesia parviflora | little silverbell | Little (1977) | 60 |
| Graphic(PDF) | Shapefiles | Hamamelis virginiana | witch hazel | Little (1977) | 61-N, 61-NE, 61-SE |
| Graphic(PDF) | Shapefiles | Hamelia patens | scarletbush | Little (1978) | 213 |
| Graphic(PDF) | Shapefiles | Helietta parvifolia | barreta | Little (1976) | 89-N, 89-SW |
| Graphic(PDF) | Shapefiles | Hippomane mancinella | manchineel | Little (1978) | 214 |
| Graphic(PDF) | Shapefiles | Holacantha emoryi | holacantha | Little (1976) | 88 |
| Graphic(PDF) | Shapefiles | Hypelate trifoliata | hypelate | Little (1978) | 215 |
| Graphic(PDF) | Shapefiles | Ilex ambigua | Carolina holly | Little (1977) | 62 |
| Graphic(PDF) | Shapefiles | Ilex amelanchier | sarvis holly | Little (1977) | 63 |
| Graphic(PDF) | Shapefiles | Ilex cassine | dahoon | Little (1977) | 64-N, 64-SE |
| Graphic(PDF) | Shapefiles | Ilex coriacea | large gallberry | Little (1977) | 65 |
| Graphic(PDF) | Shapefiles | Ilex decidua | possumhaw | Little (1977) | 66 |
| Graphic(PDF) | Shapefiles | Ilex krugiana | tawnyberry holly | Little (1978) | 216 |
| Graphic(PDF) | Shapefiles | Ilex laevigata | smooth winterberry | Little (1977) | 67 |
| Graphic(PDF) | Shapefiles | Ilex longipes | Georgia holly | Little (1978) | 158.2 |
| Graphic(PDF) | Shapefiles | Ilex montana | mountain winterberry | Little (1977) | 68 |
| Graphic(PDF) | Shapefiles | Ilex myrtifolia | myrtle dahoon | Little (1977) | 69 |
| Graphic(PDF) | Shapefiles | Ilex opaca | American holly | Little (1971) | 131-E |
| Graphic(PDF) | Shapefiles | Ilex verticillata | common winterberry | Little (1977) | 70-N, 70-NE, 70-SE |
| Graphic(PDF) | Shapefiles | Ilex vomitoria | yaupon | Little (1977) | 71-SE, 71-N |
| Graphic(PDF) | Shapefiles | Illicium floridanum | Florida anise tree | Little (1977) | 72-N, 72-NE |
| Graphic(PDF) | Shapefiles | Illicium parviflorum | yellow anise tree | Little (1977) | 73 |
| Graphic(PDF) | Shapefiles | Jacquinia keyensis | joewood | Little (1978) | 217 |
| Graphic(PDF) | Shapefiles | Juglans californica | California walnut | Little (1976) | 90 |
| Graphic(PDF) | Shapefiles | Juglans cinerea | butternut | Little (1971) | 133-E |
| Graphic(PDF) | Shapefiles | Juglans hindsii | Hinds walnut | Little (1976) | 91 |
| Graphic(PDF) | Shapefiles | Juglans major | Arizona walnut | Little (1976) | 92-N, 92-SW |
| Graphic(PDF) | Shapefiles | Juglans microcarpa | little walnut | Little (1976) | 93 |
| Graphic(PDF) | Shapefiles | Juglans nigra | black walnut | Little (1971) | 134-E |
| Graphic(PDF) | Shapefiles | Juniperus ashei | Ashe juniper | Little (1971) | 21-W, 21-E |
| Graphic(PDF) | Shapefiles | Juniperus californica | California juniper | Little (1971) | 20-W |
| Graphic(PDF) | Shapefiles | Juniperus communis | common juniper | Little (1971) | 22-W, 22-E, 22-N |
| Graphic(PDF) | Shapefiles | Juniperus deppeana | alligator juniper | Little (1971) | 23-W, 23-N |
| Graphic(PDF) | Shapefiles | Juniperus erythrocarpa | redberry juniper | Little (1981) | 36 |
| Graphic(PDF) | Shapefiles | Juniperus flaccida | drooping juniper | Little (1971) | 24-W, 24-N |
| Graphic(PDF) | Shapefiles | Juniperus horizontalis | creeping juniper | Little (1971) | 22.1-N, 22.1-W, 22.1-E |
| Graphic(PDF) | Shapefiles | Juniperus monosperma | one seed juniper | Little (1971) | 25-W, 25-N |
| Graphic(PDF) | Shapefiles | Juniperus occidentalis | western juniper | Little (1971) | 26-W |
| Graphic(PDF) | Shapefiles | Juniperus osteosperma | Utah juniper | Little (1971) | 27-W |
| Graphic(PDF) | Shapefiles | Juniperus pinchotii | Pinchot juniper | Little (1971) | 28-W |
| Graphic(PDF) | Shapefiles | Juniperus scopulorum | Rocky Mountain juniper | Little (1971) | 30-W, 30-N |
| Graphic(PDF) | Shapefiles | Juniperus silicicola | southern redcedar | Little (1971) | 29-E |
| Graphic(PDF) | Shapefiles | Juniperus virginiana | eastern redcedar | Little (1971) | 31-W, 31-E |
| Graphic(PDF) | Shapefiles | Kalmia latifolia | mountain laurel | Little (1977) | 75-NE, 75-SE |
| Graphic(PDF) | Shapefiles | Koeberlinia spinosa | allthorn | Little (1976) | 95-N, 95-SW |
| Graphic(PDF) | Shapefiles | Krugiodendron ferreum | leadwood | Little (1978) | 218 |
| Graphic(PDF) | Shapefiles | Laguncularia racemosa | white mangrove | Little (1978) | 219 |
| Graphic(PDF) | Shapefiles | Larix laricina | tamarack | Little (1971) | 32-N, 32-E |
| Graphic(PDF) | Shapefiles | Larix lyallii | subalpine larch | Little (1971) | 33-W |
| Graphic(PDF) | Shapefiles | Larix occidentalis | western larch | Little (1971) | 34-W |
| Graphic(PDF) | Shapefiles | Larrea divaricata | creosote bush | Yang (1970) | p. 44 |
| Graphic(PDF) | Shapefiles | Leitneria floridana | corkwood | Little (1977) | 74 |
| Graphic(PDF) | Shapefiles | Leucaena pulverulenta | great leadtree | Little (1976) | 96-N, 96-SW |
| Graphic(PDF) | Shapefiles | Leucaena retusa | littleleaf leadtree | Little (1976) | 94 |
| Graphic(PDF) | Shapefiles | Libocedrus decurrens | incense cedar | Little (1971) | 35-W |
| Graphic(PDF) | Shapefiles | Licaria triandra | Florida licaria | Little (1978) | 220 |
| Graphic(PDF) | Shapefiles | Liquidambar styraciflua | sweetgum | Little (1971) | 135-N, 135-E |
| Graphic(PDF) | Shapefiles | Liriodendron tulipifera | yellow poplar | Little (1971) | 137-E |
| Graphic(PDF) | Shapefiles | Lithocarpus densiflorus | tanoak | Little (1971) | 136-W |
| Graphic(PDF) | Shapefiles | Lyonia ferruginea | tree lyonia | Little (1977) | 76 |
| Graphic(PDF) | Shapefiles | Lyonothamnus floribundus | Lyontree | Little (1976) | 98 |
| Graphic(PDF) | Shapefiles | Lysiloma latisiliquum | Bahama lysiloma | Little (1978) | 221 |
| Graphic(PDF) | Shapefiles | Lysiloma microphylla | littleleaf lysiloma | Little (1976) | 97-N, 97-SW |
| Graphic(PDF) | Shapefiles | Maclura pomifera | Osage orange | Little (1971) | 138-W, 138-E |
| Graphic(PDF) | Shapefiles | Magnolia acuminata | cucumbertree | Little (1971) | 140-E |
| Graphic(PDF) | Shapefiles | Magnolia ashei | Ashe magnolia | Little (1977) | 77 |
| Graphic(PDF) | Shapefiles | Magnolia fraseri | Fraser magnolia | Little (1977) | 78 |
| Graphic(PDF) | Shapefiles | Magnolia grandiflora | southern magnolia | Little (1971) | 141-E |
| Graphic(PDF) | Shapefiles | Magnolia macrophylla | bigleaf magnolia | Little (1977) | 79 |
| Graphic(PDF) | Shapefiles | Magnolia pyramidata | pyramid magnolia | Little (1977) | 80 |
| Graphic(PDF) | Shapefiles | Magnolia tripetala | umbrella magnolia | Little (1977) | 81 |
| Graphic(PDF) | Shapefiles | Magnolia virginiana | sweetbay | Little (1971) | 142-E |
| Graphic(PDF) | Shapefiles | Malus angustifolia | southern crab apple | Little (1977) | 82 |
| Graphic(PDF) | Shapefiles | Malus coronaria | sweet crab apple | Little (1977) | 83 |
| Graphic(PDF) | Shapefiles | Malus diversifolia | Oregon crab apple | Little (1976) | 100-N, 100-W |
| Graphic(PDF) | Shapefiles | Malus ioensis | prairie crab apple | Little (1977) | 84 |
| Graphic(PDF) | Shapefiles | Manilkara bahamensis | wild dilly | Little (1978) | 222 |
| Graphic(PDF) | Shapefiles | Mastichodendron foetidissimum | false mastic | Little (1978) | 223 |
| Graphic(PDF) | Shapefiles | Maytenus phyllanthoides | Florida mayten | Little (1978) | 224 |
| Graphic(PDF) | Shapefiles | Metopium toxiferum | Florida poisontree | Little (1978) | 225 |
| Graphic(PDF) | Shapefiles | Morus microphylla | Texas mulberry | Little (1976) | 99 |
| Graphic(PDF) | Shapefiles | Morus rubra | red mulberry | Little (1971) | 139-W, 139-E |
| Graphic(PDF) | Shapefiles | Myrcianthes fragrans | twinberry stopper | Little (1978) | 226 |
| Graphic(PDF) | Shapefiles | Myrica californica | Pacific bayberry | Little (1976) | 101 |
| Graphic(PDF) | Shapefiles | Myrica cerifera | southern bayberry | Little (1977) | 85 |
| Graphic(PDF) | Shapefiles | Myrica heterophylla | evergreen bayberry | Little (1977) | 86 |
| Graphic(PDF) | Shapefiles | Myrica inodora | odorless bayberry | Little (1977) | 87 |
| Graphic(PDF) | Shapefiles | Myrica pensylvanica | northern bayberry | Little (1977) | 88-N, 88-NE |
| Graphic(PDF) | Shapefiles | Nectandra coriacea | Florida nectandra | Little (1978) | 227 |
| Graphic(PDF) | Shapefiles | Nemopanthus collinus | mountain holly | Little (1977) | 89 |
| Graphic(PDF) | Shapefiles | Nolina bigelovii | Bigelow nolina | Little (1976) | 102 |
| Graphic(PDF) | Shapefiles | Nyssa aquatica | water tupelo | Little (1971) | 143-E |
| Graphic(PDF) | Shapefiles | Nyssa ogeche | Ogeechee tupelo | Little (1971) | 145-E |
| Graphic(PDF) | Shapefiles | Nyssa sylvatica | black tupelo, blackgum | Little (1971) | 144-N, 144-E |
| Graphic(PDF) | Shapefiles | Olneya tesota | tesota | Little (1976) | 103 |
| Graphic(PDF) | Shapefiles | Opuntia fulgida | jumping cholla | Little (1976) | 104 |
| Graphic(PDF) | Shapefiles | Osmanthus americanus | devilwood | Little (1977) | 90 |
| Graphic(PDF) | Shapefiles | Ostrya chisosensis | Chisos hophornbean | Little (1976) | 105 |
| Graphic(PDF) | Shapefiles | Ostrya knowltonii | Knowlton hophornbeam | Little (1976) | 106 |
| Graphic(PDF) | Shapefiles | Ostrya virginiana | eastern hophornbeam | Little (1971) | 146-N, 146-W, 146-E |
| Graphic(PDF) | Shapefiles | Oxydendrum arboreum | sourwood | Little (1977) | 91 |
| Graphic(PDF) | Shapefiles | Parkinsonia aculeata | Jerusalem thorn | Little (1976) | 107 |
| Graphic(PDF) | Shapefiles | Persea borbonia | redbay | Little (1977) | 92 |
| Graphic(PDF) | Shapefiles | Photinia arbutifolia | Christmas berry | Little (1976) | 109-NW, 109-SW |
| Graphic(PDF) | Shapefiles | Picea breweriana | Brewer spruce | Little (1971) | 36-W |
| Graphic(PDF) | Shapefiles | Picea chihuahuana | chihuahua spruce | Gordon (1968) | Fig. 5, Page 882 |
| Graphic(PDF) | Shapefiles | Picea engelmannii | Engelmann spruce | Little (1971) | 37-W, 37-N |
| Graphic(PDF) | Shapefiles | Picea glauca | white spruce | Little (1971) | 39-W, 39-E, 39-N |
| Graphic(PDF) | Shapefiles | Picea mariana | black spruce | Little (1971) | 38-N, 38-E |
| Graphic(PDF) | Shapefiles | Picea pungens | blue spruce | Little (1971) | 40-W |
| Graphic(PDF) | Shapefiles | Picea rubens | red spruce | Little (1971) | 41-N, 41-E |
| Graphic(PDF) | Shapefiles | Picea sitchensis | Sitka spruce | Little (1971) | 42-W, 42-N |
| Graphic(PDF) | Shapefiles | Picramnia pentandra | bitterbush | Little (1978) | 228 |
| Graphic(PDF) | Shapefiles | Pinckneya pubens | pinckneya | Little (1977) | 93 |
| Graphic(PDF) | Shapefiles | Pinus albicaulis | whitebark pine | Little (1971) | 43-W, 43-N |
| Graphic(PDF) | Shapefiles | Pinus aristata | bristlecone pine | Little (1971) | 44-W |
| Graphic(PDF) | Shapefiles | Pinus attenuata | knobcone pine | Little (1971) | 48-W |
| Graphic(PDF) | Shapefiles | Pinus ayacahuite | Mexican white pine | Critchfield and Little (1966) | 9 |
| Graphic(PDF) | Shapefiles | Pinus balfouriana | foxtail pine | Little (1971) | 45-W |
| Graphic(PDF) | Shapefiles | Pinus banksiana | jack pine | Little (1971) | 46-N, 46-E |
| Graphic(PDF) | Shapefiles | Pinus caribaea | Caribbean pine | Critchfield and Little (1966) | 46 |
| Graphic(PDF) | Shapefiles | Pinus cembroides | Mexican pinyon | Little (1971) | 47-W, 47-N |
| Graphic(PDF) | Shapefiles | Pinus clausa | sand pine | Little (1971) | 49-E |
| Graphic(PDF) | Shapefiles | Pinus contorta | lodgepole pine | Little (1971) | 50-W, 50-N |
| Graphic(PDF) | Shapefiles | Pinus cooperi | Cooper pine | Critchfield and Little (1966) | 51 |
| Graphic(PDF) | Shapefiles | Pinus coulteri | Coulter pine | Little (1971) | 51-W |
| Graphic(PDF) | Shapefiles | Pinus cubensis | Cuban pine | Critchfield and Little (1966) | 46 |
| Graphic(PDF) | Shapefiles | Pinus culminicola | Potosi pinyon | Critchfield and Little (1966) | 18 |
| Graphic(PDF) | Shapefiles | Pinus douglasiana | Douglas pine | Critchfield and Little (1966) | 52 |
| Graphic(PDF) | Shapefiles | Pinus durangensis | Durango pine | Critchfield and Little (1966) | 50 |
| Graphic(PDF) | Shapefiles | Pinus echinata | shortleaf pine | Little (1971) | 52-E |
| Graphic(PDF) | Shapefiles | Pinus edulis | pinyon | Little (1971) | 53-W |
| Graphic(PDF) | Shapefiles | Pinus elliottii | slash pine | Little (1971) | 54-E |
| Graphic(PDF) | Shapefiles | Pinus engelmannii | Apache pine | Little (1971) | 55-W, 55-N |
| Graphic(PDF) | Shapefiles | Pinus flexilis | limber pine | Little (1971) | 56-W, 56-N |
| Graphic(PDF) | Shapefiles | Pinus glabra | spruce pine | Little (1971) | 58-E |
| Graphic(PDF) | Shapefiles | Pinus greggii | Gregg pine | Critchfield and Little (1966) | 60 |
| Graphic(PDF) | Shapefiles | Pinus hartwegii | Hartweg pine | Critchfield and Little (1966) | 51 |
| Graphic(PDF) | Shapefiles | Pinus jeffreyi | Jeffrey pine | Little (1971) | 57-W |
| Graphic(PDF) | Shapefiles | Pinus lambertiana | sugar pine | Little (1971) | 59-W |
| Graphic(PDF) | Shapefiles | Pinus lawsonii | Lawson pine | Critchfield and Little (1966) | 53 |
| Graphic(PDF) | Shapefiles | Pinus leiophylla | Chihuahua pine | Little (1971), Critchfield and Little (1966) | 61-W, 61-N, 22 |
| Graphic(PDF) | Shapefiles | Pinus longaeva | Intermountain bristlecone pine | Bailey, 1970; Little, 1971 | p. 215, 44W |
| Graphic(PDF) | Shapefiles | Pinus lumholtzii | Lumholtz pine | Critchfield and Little (1966) | 23 |
| Graphic(PDF) | Shapefiles | Pinus maximartinezii | Mart?nez pinyon | Critchfield and Little (1966) | 15 |
| Graphic(PDF) | Shapefiles | Pinus michoacana | Michoacßn pine | Critchfield and Little (1966) | 50 |
| Graphic(PDF) | Shapefiles | Pinus monophylla | singleleaf pinyon | Little (1971) | 60-W |
| Graphic(PDF) | Shapefiles | Pinus monticola | western white pine | Little (1971) | 62-W |
| Graphic(PDF) | Shapefiles | Pinus montezumae | Montezuma pine | Critchfield and Little (1966) | 49 |
| Graphic(PDF) | Shapefiles | Pinus muricata | bishop pine | Little (1971) | 63-W |
| Graphic(PDF) | Shapefiles | Pinus nelsonii | Nelson pinyon | Critchfield and Little (1966) | 18 |
| Graphic(PDF) | Shapefiles | Pinus occidentalis | West Indian pine | Critchfield and Little (1966) | 46 |
| Graphic(PDF) | Shapefiles | Pinus oocarpa | Nicaraguan pitch pine; ocote pine | Critchfield and Little (1966) | 61 |
| Graphic(PDF) | Shapefiles | Pinus palustris | longleaf pine | Little (1971) | 65-E |
| Graphic(PDF) | Shapefiles | Pinus patula | Mexican weeping pine | Critchfield and Little (1966) | 60 |
| Graphic(PDF) | Shapefiles | Pinus pinceana | Pince pinyon | Critchfield and Little (1966) | 18 |
| Graphic(PDF) | Shapefiles | Pinus ponderosa | ponderosa pine | Little (1971) | 64-W, 64-N |
| Graphic(PDF) | Shapefiles | Pinus pringlei | Pringle pine | Critchfield and Little (1966) | 61 |
| Graphic(PDF) | Shapefiles | Pinus pseudostrobus | False Weymouth pine | Critchfield and Little (1966) | 52 |
| Graphic(PDF) | Shapefiles | Pinus pungens | Table Mountain pine | Little (1971) | 66-E |
| Graphic(PDF) | Shapefiles | Pinus quadrifolia | Parry pinyon | Little (1971) | 67-W |
| Graphic(PDF) | Shapefiles | Pinus radiata | Monterey pine | Little (1971) | 68-W |
| Graphic(PDF) | Shapefiles | Pinus resinosa | red pine | Little (1971) | 69-N, 69-E |
| Graphic(PDF) | Shapefiles | Pinus rigida | pitch pine | Little (1971) | 71-E |
| Graphic(PDF) | Shapefiles | Pinus sabiniana | Digger pine | Little (1971) | 70-W |
| Graphic(PDF) | Shapefiles | Pinus serotina | pond pine | Little (1971) | 74-E |
| Graphic(PDF) | Shapefiles | Pinus strobus | eastern white pine | Little (1971) | 73-N, 73-E |
| Graphic(PDF) | Shapefiles | Pinus strobiformis | southwestern white pine | Little (1971) | 72-W, 72-N |
| Graphic(PDF) | Shapefiles | Pinus taeda | loblolly pine | Little (1971) | 75-E |
| Graphic(PDF) | Shapefiles | Pinus teocote | Twisted leaves pine; Aztec pine | Critchfield and Little (1966) | 53 |
| Graphic(PDF) | Shapefiles | Pinus torreyana | Torrey pine | Little (1971) | 76-W |
| Graphic(PDF) | Shapefiles | Pinus tropicalis | tropical pine | Critchfield and Little (1966) | 26 |
| Graphic(PDF) | Shapefiles | Pinus virginiana | Virginia pine | Little (1971) | 77-E |
| Graphic(PDF) | Shapefiles | Pinus washoensis | Washoe pine | Little (1971) | 78-W |
| Graphic(PDF) | Shapefiles | Piscidia piscipula | Florida fishpoison tree | Little (1978) | 229 |
| Graphic(PDF) | Shapefiles | Pisonia rotundata | pisonia | Little (1978) | 230 |
| Graphic(PDF) | Shapefiles | Pistacia texana | Texas pistache | Little (1976) | 108 |
| Graphic(PDF) | Shapefiles | Pithecellobium flexicaule | ebony blackbead | Little (1976) | 110-N, 110-SW |
| Graphic(PDF) | Shapefiles | Pithecellobium guadalupense | Guadeloupe blackbead | Little (1978) | 231 |
| Graphic(PDF) | Shapefiles | Pithecellobium pallens | huajillo | Little (1976) | 111-N, 111-SW |
| Graphic(PDF) | Shapefiles | Pithecellobium unguis-cati | catclaw blackbead | Little (1978) | 232 |
| Graphic(PDF) | Shapefiles | Planera aquatica | planertree | Little (1977) | 94 |
| Graphic(PDF) | Shapefiles | Platanus occidentalis | American sycamore | Little (1971) | 147-W, 147-E, 147-N |
| Graphic(PDF) | Shapefiles | Platanus racemosa | California sycamore | Little (1976) | 112 |
| Graphic(PDF) | Shapefiles | Platanus wrightii | Arizona sycamore | Little (1976) | 113 |
| Graphic(PDF) | Shapefiles | Populus angustifolia | narrowleaf cottonwood | Little (1976) | 114 |
| Graphic(PDF) | Shapefiles | Populus arizonica | Arizona cottonwood | Little (1976) | 115 |
| Graphic(PDF) | Shapefiles | Populus balsamifera | balsam poplar | Little (1971) | 148-N, 148-W, 148-E |
| Graphic(PDF) | Shapefiles | Populus deltoides | eastern cottonwood | Little (1971) | 149-W,149-E |
| Graphic(PDF) | Shapefiles | Populus fremontii | Fremont cottonwood | Little (1971) | 150-W |
| Graphic(PDF) | Shapefiles | Populus grandidentata | bigtooth aspen | Little (1971) | 152-N, 152-E |
| Graphic(PDF) | Shapefiles | Populus heterophylla | swamp cottonwood | Little (1971) | 151-E |
| Graphic(PDF) | Shapefiles | Populus hinckleyana | Hinckley cottonwood | Little (1976) | 116 |
| Graphic(PDF) | Shapefiles | Populus tremuloides | quaking aspen | Little (1971) | 154-W, 154-E, 154-N |
| Graphic(PDF) | Shapefiles | Populus trichocarpa | black cottonwood | Little (1971) | 153-W, 153-N |
| Graphic(PDF) | Shapefiles | Prosopis juliflora | mesquite | Little (1976) | 118-N, 118-SW |
| Graphic(PDF) | Shapefiles | Prosopis pubescens | screwbean mesquite | Little (1976) | 117 |
| Graphic(PDF) | Shapefiles | Prunus alleghaniensis | Allegheny plum | Little (1977) | 96 |
| Graphic(PDF) | Shapefiles | Prunus americana | American plum | Little (1976, 1977) | 119-NW, 119-SW, 95-NE, 95-SE |
| Graphic(PDF) | Shapefiles | Prunus angustifolia | Chickasaw plum | Little (1976, 1977) | 120, 97 |
| Graphic(PDF) | Shapefiles | Prunus caroliniana | Carolina laurelcherry | Little (1977) | 98 |
| Graphic(PDF) | Shapefiles | Prunus emarginata | bitter cherry | Little (1976) | 122-N, 122-W |
| Graphic(PDF) | Shapefiles | Prunus fremontii | desert apricot | Little (1976) | 121 |
| Graphic(PDF) | Shapefiles | Prunus hortulana | hortulan plum | Little (1977) | 99 |
| Graphic(PDF) | Shapefiles | Prunus ilicifolia | hollyleaf cherry | Little (1976) | 123 |
| Graphic(PDF) | Shapefiles | Prunus lyonii | Catalina cherry | Little (1976) | 124 |
| Graphic(PDF) | Shapefiles | Prunus mexicana | Mexican plum | Little (1977) | 100-N, 100-SE |
| Graphic(PDF) | Shapefiles | Prunus munsoniana | wildgoose plum | Little (1977) | 101 |
| Graphic(PDF) | Shapefiles | Prunus myrtifolia | West Indies cherry | Little (1978) | 233 |
| Graphic(PDF) | Shapefiles | Prunus nigra | Canada plum | Little (1977) | 102 |
| Graphic(PDF) | Shapefiles | Prunus pensylvanica | pin cherry | Little (1976, 1977) | 125-N, 125-NW, 103-N, 103-NE |
| Graphic(PDF) | Shapefiles | Prunus serotina | black cherry | Little (1971) | 155-N, 155-W, 155-E |
| Graphic(PDF) | Shapefiles | Prunus subcordata | Klamath plum | Little (1976) | 126 |
| Graphic(PDF) | Shapefiles | Prunus umbellata | flatwoods plum | Little (1977) | 105 |
| Graphic(PDF) | Shapefiles | Prunus virginiana | common chokecherry | Little (1976, 1977) | 127-N, 127-NW, 127-SW, 104-N, 104-NE |
| Graphic(PDF) | Shapefiles | Pseudotsuga macrocarpa | bigcone Douglas fir | Little (1971) | 79-W |
| Graphic(PDF) | Shapefiles | Pseudotsuga menziesii | Douglas fir | Little (1971) | 80-W, 80-N |
| Graphic(PDF) | Shapefiles | Pseudophoenix sargentii | buccaneer palm | Little (1978) | 234 |
| Graphic(PDF) | Shapefiles | Psidium longipes | long stalk stopper | Little (1978) | 235 |
| Graphic(PDF) | Shapefiles | Ptelea crenulata | California hoptree | Little (1976) | 129 |
| Graphic(PDF) | Shapefiles | Ptelea trifoliata | common hoptree | Little (1976) | 128-N, 128-SW |
| Graphic(PDF) | Shapefiles | Quercus agrifolia | California live oak | Little (1971) | 156-W |
| Graphic(PDF) | Shapefiles | Quercus ajoensis | Ajo oak | Little (1976) | 130 |
| Graphic(PDF) | Shapefiles | Quercus alba | white oak | Little (1971) | 157-E |
| Graphic(PDF) | Shapefiles | Quercus arizonica | Arizona white oak | Little (1976) | 131 |
| Graphic(PDF) | Shapefiles | Quercus arkansana | Arkansas oak | Little (1977) | 107 |
| Graphic(PDF) | Shapefiles | Quercus bicolor | swamp white oak | Little (1971) | 159-E |
| Graphic(PDF) | Shapefiles | Quercus chapmanii | Chapman oak | Little (1977) | 108 |
| Graphic(PDF) | Shapefiles | Quercus chrysolepis | canyon live oak | Little (1971) | 158-W |
| Graphic(PDF) | Shapefiles | Quercus coccinea | scarlet oak | Little (1971) | 161-E |
| Graphic(PDF) | Shapefiles | Quercus douglasii | blue oak | Little (1971) | 160-W |
| Graphic(PDF) | Shapefiles | Quercus dunnii | Dunn oak | Little (1976) | 132 |
| Graphic(PDF) | Shapefiles | Quercus durandii | Durand oak | Little (1977) | 109 |
| Graphic(PDF) | Shapefiles | Quercus ellipsoidalis | northern pin oak | Little (1971) | 163-E |
| Graphic(PDF) | Shapefiles | Quercus emoryi | Emory oak | Little (1971) | 162-W |
| Graphic(PDF) | Shapefiles | Quercus engelmannii | Engelmann oak | Little (1976) | 133 |
| Graphic(PDF) | Shapefiles | Quercus falcata | southern red oak | Little (1971) | 165-E |
| Graphic(PDF) | Shapefiles | Quercus gambelii | Gambel oak | Little (1971) | 164-W |
| Graphic(PDF) | Shapefiles | Quercus garryana | Oregon white oak | Little (1971) | 166-W |
| Graphic(PDF) | Shapefiles | Quercus georgiana | Georgia oak | Little (1977) | 110 |
| Graphic(PDF) | Shapefiles | Quercus glaucoides | Lacey oak | Little (1976) | 134 |
| Graphic(PDF) | Shapefiles | Quercus graciliformis | Chisos oak | Little (1976) | 135 |
| Graphic(PDF) | Shapefiles | Quercus gravesii | Graves oak incl. Q. tardifolia (Muller) lateleaf oak | Little (1976) | 136 |
| Graphic(PDF) | Shapefiles | Quercus grisea | gray oak | Little (1976) | 137 |
| Graphic(PDF) | Shapefiles | Quercus havardii | Havard oak | Little (1976) | 138 |
| Graphic(PDF) | Shapefiles | Quercus hypoleucoides | silverleaf oak | Little (1976) | 139 |
| Graphic(PDF) | Shapefiles | Quercus ilicifolia | bear oak | Little (1977) | 111 |
| Graphic(PDF) | Shapefiles | Quercus imbricaria | shingle oak | Little (1977) | 112 |
| Graphic(PDF) | Shapefiles | Quercus incana | bluejack oak | Little (1977) | 113 |
| Graphic(PDF) | Shapefiles | Quercus kelloggii | California black oak | Little (1971) | 167-W |
| Graphic(PDF) | Shapefiles | Quercus laevis | turkey oak | Little (1977) | 114 |
| Graphic(PDF) | Shapefiles | Quercus laurifolia | laurel oak | Little (1971) | 168-E |
| Graphic(PDF) | Shapefiles | Quercus lobata | California white oak | Little (1971) | 170-W |
| Graphic(PDF) | Shapefiles | Quercus lyrata | overcup oak | Little (1971) | 169-E |
| Graphic(PDF) | Shapefiles | Quercus macdonaldii | McDonald oak | Little (1976) | 140 |
| Graphic(PDF) | Shapefiles | Quercus macrocarpa | bur oak | Little (1971) | 172-W, 172-E |
| Graphic(PDF) | Shapefiles | Quercus marilandica | blackjack oak | Little (1971) | 171-E |
| Graphic(PDF) | Shapefiles | Quercus michauxii | swamp chestnut oak | Little (1971) | 174-E |
| Graphic(PDF) | Shapefiles | Quercus mohriana | Mohrs oak | Little (1976) | 141 |
| Graphic(PDF) | Shapefiles | Quercus muehlenbergii | chinkapin oak | Little (1971) | 173-W, 173-E |
| Graphic(PDF) | Shapefiles | Quercus myrtifolia | myrtle oak | Little (1977) | 115 |
| Graphic(PDF) | Shapefiles | Quercus nigra | water oak | Little (1971) | 175-E |
| Graphic(PDF) | Shapefiles | Quercus nuttallii | Nuttall oak | Little (1971) | 176-E |
| Graphic(PDF) | Shapefiles | Quercus oblongifolia | Mexican blue oak | Little (1976) | 142 |
| Graphic(PDF) | Shapefiles | Quercus oglethorpensis | Oglethorpe oak | Little (1977) | 116 |
| Graphic(PDF) | Shapefiles | Quercus palustris | pin oak | Little (1971) | 177-E |
| Graphic(PDF) | Shapefiles | Quercus phellos | willow oak | Little (1971) | 178-E |
| Graphic(PDF) | Shapefiles | Quercus prinus | chestnut oak | Little (1971) | 179-E |
| Graphic(PDF) | Shapefiles | Quercus pungens | sandpaper oak | Little (1976) | 144 |
| Graphic(PDF) | Shapefiles | Quercus rubra | northern red oak | Little (1971) | 180-N, 180-E |
| Graphic(PDF) | Shapefiles | Quercus rugosa | netleaf oak | Little (1976) | 143-N, 143-SW |
| Graphic(PDF) | Shapefiles | Quercus shumardii | Shumard oak | Little (1971) | 181-W, 181-E |
| Graphic(PDF) | Shapefiles | Quercus stellata | post oak | Little (1971) | 182-W, 182-E |
| Graphic(PDF) | Shapefiles | Quercus tomentella | island live oak | Little (1976) | 145 |
| Graphic(PDF) | Shapefiles | Quercus toumeyi | Toumey oak | Little (1976) | 146 |
| Graphic(PDF) | Shapefiles |