Little's Tree Species Distribution Maps
Citation
Fryer, Janet L., comp. 2018. Tree species distribution maps from Little's "Atlas of United States trees" series. In: Fire Effects Information System, [Online]. U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory (Producer). Available: https://research.fs.usda.gov/feis/treedistributionmaps [92602].
Background
This FEIS document provides maps of the ranges of tree species in North America. They were compiled mostly by Little (see References below) and digitized by Thompson et al. (1999). Links to PDFs of Little's maps are provided in the table below.
Nomenclature
The maps are presented in their original form except when scientific and/or common names have changed. When name(s) have changed, the currently accepted scientific name and/or common name used in PLANTS Database has been added below the older name(s).
| Links to Little's maps | Scientific names | Common names | References |
|---|---|---|---|
| Abies amabilis | Pacific silver fir | Little 1971 | |
| Abies balsamea | balsam fir | Little 1971 | |
| Abies bracteata | bristlecone fir | Little 1971 | |
| Abies concolor | white fir | Little 1971 | |
| Abies fraseri | Fraser fir | Little 1971 | |
| Abies grandis | grand fir | Little 1971 | |
| Abies lasiocarpa | subalpine fir | Little 1971 | |
| Abies magnifica | California red fir | Little 1971 | |
| Abies procera | noble fir | Little 1971 | |
| Acacia berlandieri (Senegalia berlandieri) | Berlandier acacia (guajillo) | Little 1976 | |
| Acacia choriophylla (Vachellia choriophylla) | cinnecord | Little 1978 | |
| Acacia farnesiana (Vachellia farnesiana) | sweet acacia | Little 1976 | |
| Acacia greggii (Senegalia greggii) | catclaw acacia | Little 1976 | |
| Acacia macracantha (Vachellia macracantha) | long spine acacia (porknut) | Little 1978 | |
| Acacia rigidula (Vachellia rigidula) | blackbrush acacia | Little 1976 | |
| Acacia roemeriana (Senegalia roemeriana) | Roemer acacia (roundflower catclaw) | Little 1976 | |
| Acacia tortuosa (Vachellia tortuosa) | twisted acacia (poponax) | Little 1976 | |
| Acacia wrightii (Senegalia wrightii) | Wright acacia | Little 1976 | |
| Acer barbatum (Acer floridanum) | Florida maple (southern sugar maple) | Little 1977 | |
| Acer circinatum | vine maple | Little 1976 | |
| Acer glabrum | Rocky Mountain maple | Little 1976 | |
| Acer grandidentatum | bigtooth maple | Little 1976 | |
| Acer leucoderme | chalk maple | Little 1977 | |
| Acer macrophyllum | bigleaf maple | Little 1971 | |
| Acer negundo | boxelder | Little 1971 | |
| Acer nigrum | black maple | Little 1971 | |
| Acer pensylvanicum | striped maple | Little 1977 | |
| Acer rubrum | red maple | Little 1971 | |
| Acer saccharinum | silver maple | Little 1971 | |
| Acer saccharum | sugar maple | Little 1971 | |
| Acer spicatum | mountain maple | Little 1977 | |
| Acoelorrhaphe wrightii | paurotis palm (brownfoot) | Little 1978 | |
| Aesculus californica | California buckeye | Little 1976 | |
| Aesculus glabra | Ohio buckeye | Little 1971 | |
| Aesculus octandra | yellow buckeye | Little 1971 | |
| Aesculus parviflora | bottlebrush buckeye | Little 1977 | |
| Aesculus pavia | red buckeye | Little 1977 | |
| Aesculus sylvatica | painted buckeye | Little 1977 | |
| Agave utahensis | Utah agave | Benson and Darrow 1981 | |
| Alnus maritima | seaside alder | Little 1977 | |
| Alnus oblongifolia | Arizona alder | Little 1976 | |
| Alnus rhombifolia | white alder | Little 1976 | |
| Alnus rubra | red alder | Little 1971 | |
| Alnus rugosa (Alnus incana subsp. rugosa) | speckled alder | Little 1977 | |
| Alnus serrulata | hazel alder | Little 1977 | |
| Alnus sinuata (Alnus viridis subsp. sinuata) | Sitka alder | Little 1976 | |
| Alnus tenuifolia (Alnus incana subsp. tenuifolia) | thinleaf alder | Little 1976 | |
| Alvaradoa amorphoides | Mexican alvaradoa | Little 1978 | |
| Amelanchier alnifolia | western serviceberry (Saskatoon serviceberry) | Little 1976 | |
| Amelanchier arborea | downy serviceberry (common serviceberry) | Little 1977 | |
| Amelanchier interior | inland serviceberry | Little 1977 | |
| Amelanchier sanguinea | roundleaf serviceberry | Little 1977 | |
| Amelanchier utahensis | Utah serviceberry | Little 1976 | |
| Amphitecna latifolia | black calabash | Little 1978 | |
| Amyris balsamifera | balsam torchwood | Little 1978 | |
| Amyris elemifera | torchwood (sea torchwood) | Little 1978 | |
| Annona glabra | pond-apple | Little 1978 | |
| Aralia spinosa | devil's walkingstick | Little 1977 | |
| Arbutus arizonica | Arizona madrone | Little 1976 | |
| Arbutus menziesii | Pacific madrone | Little 1971 | |
| Arbutus texana (Arbutus xalapensis) | Texas madrone | Little 1976 | |
| Arctostaphylos pringlei | Pringle manzanita | Little 1976 | |
| Ardisia escallonioides (Ardisia escallonoides) | marlberry (island marlberry) | Little 1978 | |
| Artemisia tridentata | big sagebrush | Little 1976 | |
| Artemisia tridentata var. tridentata | basin big sagebrush | ||
| Artemisia tridentata var. vaseyana | mountain big sagebrush | ||
| Artemisia tridentata var. wyomingensis | Wyoming big sagebrush | ||
| Asimina parviflora | smallflower pawpaw | Little 1978 | |
| Asimina triloba | pawpaw | Little 1977 | |
| Avicennia germinans | black mangrove | Little 1977, 1978 | |
| Baccharis halimifolia | eastern baccharis | Little 1977 | |
| Betula alleghaniensis | yellow birch | Little 1971 | |
| Betula lenta | sweet birch | Little 1971 | |
| Betula nana | dwarf birch | Little 1975 | |
| Betula nigra | river birch | Little 1971 | |
| Betula occidentalis | water birch | Little 1976 | |
| Betula papyrifera | paper birch | Little 1971 | |
| Betula populifolia | gray birch | Little 1971 | |
| Betula uber | Ashe birch (Virginia roundleaf birch) | Little 1977 | |
| Bourreria ovata (Bourreria succulenta) | Bahama strongbark (bodywood) | Little 1978 | |
| Bourreria radula | rough strongbark | Little 1978 | |
| Bumelia celastrina (Sideroxylon celastrinum) | saffron plum | Little 1976, 1978 | |
| Bumelia lanuginosa (Sideroxylon lanuginosa) | gum bumelia (gum bully) | Little 1976, 1977 | |
| Bumelia lycioides (Sideroxylon lycioides) | buckthorn bumelia (buckthorn bully) | Little 1977 | |
| Bumelia tenax (Sideroxylon tenax) | tough bumelia (tough bully) | Little 1977 | |
| Bursera fagaroides | fragrant bursera | Little 1976 | |
| Bursera microphylla | elephant tree | Little 1976 | |
| Bursera simaruba | gumbo limbo | Little 1978 | |
| Byrsonima lucida | key byrsonima (Long Key locustberry) | Little 1978 | |
| Caesalpinia mexicana | Mexican poinciana (Mexican holdback) | Little 1976 | |
| Calyptranthes pallens | pale lidflower | Little 1978 | |
| Calyptranthes zuzygium | myrtle of the river | Little 1978 | |
| Canella winterana | canella (wild-cinnamon) | Little 1978 | |
| Canotia holacantha | canotia (crucifixion thorn) | Little 1976 | |
| Capparis cynophallophora | Jamaica caper | Little 1978 | |
| Capparis flexuosa | limber caper (falseteeth) | Little 1978 | |
| Carpinus caroliniana | American hornbeam | Little 1971 | |
| Carya aquatica | water hickory | Little 1971 | |
| Carya cordiformis | bitternut hickory | Little 1971 | |
| Carya floridana | scrub hickory | Little 1977 | |
| Carya glabra | pignut hickory | Little 1971 | |
| Carya illinoensis | pecan | Little 1971 | |
| Carya laciniosa | shellbark hickory | Little 1971 | |
| Carya myristicaeformis (Carya myristiciformis) | nutmeg hickory | Little 1971 | |
| Carya ovata | shagbark hickory | Little 1971 | |
| Carya pallida | sand hickory | Little 1977 | |
| Carya texana | black hickory | Little 1977 | |
| Carya tomentosa | mockernut hickory | Little 1971 | |
| Castanea alnifolia (Castanea pumila var. pumila) | Florida chinkapin (chinquapin) | Little 1977 | |
| Castanopsis chrysophylla (Chrysolepis chrysophylla) | golden chinkapin (giant chinquapin) | Little 1971 | |
| Castanea dentata | American chestnut | Little 1977 | |
| Castanea ozarkensis | Ozark chinkapin (Ozark chinquapin) | Little 1977 | |
| Castanea pumila | Allegheny chinkapin (chinquapin) | Little 1977 | |
| Catalpa bignonioides | southern catalpa | Little 1977 | |
| Catalpa speciosa | northern catalpa | Little 1971 | |
| Ceanothus arboreus | feltleaf ceanothus | Little 1976 | |
| Ceanothus spinosus | spiny ceanothus | Little 1976 | |
| Ceanothus thyrsiflorus | blueblossom (blueblossom ceanothus) | Little 1976 | |
| Celtis laevigata | sugarberry | Little 1971 | |
| Celtis lindheimeri | Lindheimer's hackberry | Little 1976 | |
| Celtis occidentalis | hackberry (common hackberry) | Little 1971 | |
| Celtis reticulata (Celtis laevigata var. reticulata) | netleaf hackberry | Little 1976 | |
| Celtis tenuifolia (Celtis pumila) | Georgia hackberry (dwarf hackberry) | Little 1977 | |
| Cephalanthus occidentalis | common buttonbush | Little 1976, 1977 | |
| Cercocarpus betuloides (Cercocarpus montanus var. glaber) | birchleaf cercocarpus (birchleaf mountain-mohagany) | Little 1976 | |
| Cercocarpus breviflorus | hairy cercocarpus (hairy mountain-mahogany) | Little 1976 | |
| Cercis canadensis | eastern redbud | Little 1976, 1977 | |
| Cercidium floridum (Parkinsonia florida) | blue paloverde | Little 1976 | |
| Cercocarpus ledifolius | curlleaf cercocarpus (curlleaf mountain-mahogany) | Little 1976 | |
| Cercidium macrum (Parkinsonia texana) | border paloverde (Texas paloverde) | Little 1976 | |
| Cercidium microphyllum (Parkinsonia microphylla) | yellow paloverde | Little 1976 | |
| Cercis occidentalis | California redbud | Little 1976 | |
| Cercocarpus traskiae | Catalina cercocarpus (Catalina Island mountain-mahogany) | Little 1976 | |
| Carnegiea gigantea (Cereus giganteus) | saguaro | Little 1976 | |
| Cereus robinii (Pilosocereus polygonus) | key tree cactus (Deering's tree cactus) | Little 1978 | |
| Chamaecyparis lawsoniana | Port Orford-cedar (Port-Orford-cedar) | Little 1971 | |
| Callitropsis nootkatensis (Chamaecyparis nootkatensis) | yellow-cedar (Alaska-cedar) | Little 1971 | |
| Chamaecyparis thyoides | Atlantic white cedar (Atlantic white-cedar) | Little 1971 | |
| Chilopsis linearis | desert willow | Little 1976 | |
| Chionanthus virginicus | fringetree (white fringetree) | Little 1977 | |
| Chrysobalanus icaco | cocoplum (coco-plum) | Little 1978 | |
| Chrysophyllum oliviforme | satinleaf | Little 1978 | |
| Citharexylum berlandieri | Berlandier's fiddlewood | Little 1976 | |
| Citharexylum fruticosum | Florida fiddlewood (spiny fiddlewood) | Little 1978 | |
| Cladrastis kentukea | yellowwood | Little 1977 | |
| Clethra acuminata | cinnamon clethra (mountain sweetpepperbush) | Little 1977 | |
| Cliftonia monophylla | buckwheat tree | Little 1977 | |
| Clusia rosea | Florida clusia | Little 1978 | |
| Coccothrinax argentata | Florida silver palm | Little 1978 | |
| Coccoloba diversifolia | pigeon plum (tie-tongue) | Little 1978 | |
| Coccoloba uvifera | seagrape | Little 1978 | |
| Colubrina arborescens | coffee colubrina (greenheart) | Little 1978 | |
| Colubrina cubensis | Cuba colubrina (Cuban nakedwood) | Little 1978 | |
| Colubrina elliptica | soldierwood | Little 1978 | |
| Condalia globosa | bitter condalia (bitter snakewood) | Little 1976 | |
| Condalia hookeri | bluewood (Brazilian bluewood) | Little 1976 | |
| Conocarpus erectus | button mangrove | Little 1978 | |
| Cordia boissieri | anacahuita | Little 1976 | |
| Cordia sebestena | Geiger tree (largeleaf geigertree) | Little 1978 | |
| Cornus alternifolia | alternate leaf dogwood (alternateleaf dogwood) | Little 1977 | |
| Cornus drummondii | roughleaf dogwood | Little 1977 | |
| Cornus florida | flowering dogwood | Little 1971 | |
| Cornus glabrata | brown dogwood | Little 1976 | |
| Cornus nuttallii | Pacific dogwood | Little 1976 | |
| Cornus occidentalis | western dogwood | Little 1976 | |
| Cornus racemosa | gray dogwood | Little 1977 | |
| Cornus rugosa | roundleaf dogwood | Little 1977 | |
| Cornus sessilis | blackfruit dogwood | Little 1976 | |
| Cornus stolonifera (Cornus sericea) | red osier dogwood (red-osier dogwood) | Little 1977 | |
| Cornus stricta (Cornus foemina) | stiffcornel dogwood (stiff dogwood) | Little 1977 | |
| Corylus cornuta (Corylus cornuta var. cornuta) | beaked hazel (beaked hazelnut) | Little 1977 | |
| Cotinus obovatus | American smoketree | Little 1977 | |
| Cowania mexicana (Purshia mexicana, Purshia stansburiana) | cliffrose (Mexican cliffrose, Stansbury cliffrose) | Little 1976 | |
| Crataegus chrysocarpa | fireberry hawthorn | Little 1976 | |
| Crataegus columbiana (Crataegus chrysocarpa var. piperi) | Columbia hawthorn (Piper's hawthorn) | Little 1976 | |
| Crataegus douglasii | black hawthorn | Little 1976 | |
| Crataegus erythropoda | cerro hawthorn | Little 1976 | |
| Crataegus saligna | willow hawthorn | Little 1976 | |
| Crataegus succulenta | fleshy hawthorn | Little 1976 | |
| Crataegus tracyi | Tracy's hawthorn | Little 1976 | |
| Crossopetalum rhacoma | Florida crossopetalum (maidenberry) | Little 1978 | |
| Cupania glabra | Florida cupania (Florida toadwood) | Little 1978 | |
| Cupressus arizonica (Hesperocyparis arizonica) | Arizona cypress | Little 1971 | |
| Cupressus bakeri (Hesperocyparis bakeri) | Modoc cypress (Baker cupress) | Little 1971 | |
| Cupressus goveniana (Hesperocyparis goveniana) | Gowen cypress | Little 1971 | |
| Cupressus guadalupensis (Hesperocyparis guadalupensis) | Tecate cypress (Guadalupe cypress) | Little 1971 | |
| Cupressus macnabiana (Hesperocyparis macnabiana) | MacNab's cypress | Little 1971 | |
| Cupressus macrocarpa (Hesperocyparis macrocarpa) | Monterey cypress | Little 1971 | |
| Cupressus sargentii (Hesperocyparis sargentii) | Sargent cypress | Little 1971 | |
| Cyrilla racemiflora | swamp cyrilla (swamp titi) | Little 1977 | |
| Dalea spinosa (Psorothamnus spinosus) | smokethorn (smoketree) | Little 1976 | |
| Diospyros texana | Texas persimmon | Little 1976 | |
| Diospyros virginiana | common persimmon | Little 1971 | |
| Dipholis salicifolia (Sideroxylon salicifolium) | willow bustic (white bully) | Little 1978 | |
| Dodonaea viscosa | hopbush (Florida hopbush) | Little 1976, 1978 | |
| Drypetes diversifolia | milkbark | Little 1978 | |
| Drypetes lateriflora | Guiana plum | Little 1978 | |
| Ehretia anacua | anaqua (knockaway) | Little 1976 | |
| Elliottia racemosa | elliottia (georgiaplume) | Little 1977 | |
| Erythrina flabelliformis | southwestern coralbean (coral bean) | Little 1976 | |
| Erythrina herbacea | eastern coralbean (redcardinal) | Little 1977 | |
| Esenbeckia berlandieri | Berlandier esenbeckia (Berlandier's jopoy) | Little 1976 | |
| Eugenia axillaris | white stopper (white-stopper) | Little 1978 | |
| Eugenia confusa | redberry stopper | Little 1978 | |
| Eugenia foetida | boxleaf stopper | Little 1978 | |
| Eugenia rhombea | red stopper | Little 1978 | |
| Euonymus atropurpureus | eastern wahoo (eastern burning bush) | Little 1977 | |
| Euonymus occidentalis | western wahoo (western burning bush) | Little 1976 | |
| Exostema caribaeum | princewood (Caribbean princewood) | Little 1978 | |
| Exothea paniculata | inkwood | Little 1978 | |
| Eysenhardtia polystachya (Eysenhardtia orthocarpa) | kidneywood (Tahitian kidneywood) | Little 1976 | |
| Eysenhardtia texana | Texas kidneywood | Little 1976 | |
| Fagus grandifolia | American beech | Little 1971 | |
| Ficus aurea | Florida strangler fig | Little 1978 | |
| Ficus citrifolia | shortleaf fig (wild banyantree) | Little 1978 | |
| Forestiera acuminata | swamp privet (eastern swampprivet) | Little 1977 | |
| Forestiera angustifolia | Texas forestiera (Texas swampprivet) | Little 1976 | |
| Forestiera phillyreoides (Forestiera shrevei) | desert olive forestiera (desert-olive) | Little 1976 | |
| Forestiera segregata | Florida privet (Florida swampprivet) | Little 1977 | |
| Franklinia alatamaha | franklinia (Franklin tree) | Little 1977 | |
| Fraxinus americana | white ash | Little 1971 | |
| Fraxinus anomala | singleleaf ash | Little 1976 | |
| Fraxinus berlandieriana | Berlandier ash (Mexican ash) | Little 1976 | |
| Fraxinus caroliniana | Carolina ash | Little 1977 | |
| Fraxinus cuspidata | fragrant ash | Little 1976 | |
| Fraxinus dipetala | two petal ash (California ash) | Little 1976 | |
| Fraxinus gooddingii | Goodding's ash | Little 1976 | |
| Fraxinus greggii | Gregg's ash | Little 1976 | |
| Fraxinus latifolia | Oregon ash | Little 1971 | |
| Fraxinus nigra | black ash | Little 1971 | |
| Fraxinus papillosa | Chihuahua ash (Chihuahuan ash) | Little 1976 | |
| Fraxinus pennsylvanica | green ash | Little 1971 | |
| Fraxinus profunda | pumpkin ash | Little 1977 | |
| Fraxinus quadrangulata | blue ash | Little 1971 | |
| Fraxinus texensis | Texas ash | Little 1976 | |
| Fraxinus velutina | velvet ash | Little 1976 | |
| Fremontodendron californicum | California fremontia (California flannelbush) | Little 1976 | |
| Fremontodendron mexicanum | Mexican fremontia (Mexican flannelbush) | Little 1976 | |
| Garrya elliptica | wavyleaf silktassel (silk tassel bush) | Little 1976 | |
| Genipa clusiifolia | seven year apple (sevenyear apple) | Little 1978 | |
| Gleditsia aquatica | waterlocust (water locust) | Little 1977 | |
| Gleditsia triacanthos | honeylocust | Little 1971 | |
| Gordonia lasianthus | loblolly bay | Little 1977 | |
| Guaiacum angustifolium | Texas lignumvitae (Texas lignum-vitae) | Little 1976 | |
| Guaiacum sanctum | roughbark lignumvitae (holywood) | Little 1978 | |
| Guapira discolor | blolly (beeftree) | Little 1978 | |
| Guettarda elliptica | elliptic leaf velvetseed (hammock velvetseed) | Little 1978 | |
| Guettarda scabra | roughleaf velvetseed (wild guave) | Little 1978 | |
| Gyminda latifolia | falsebox (West Indian false box) | Little 1978 | |
| Gymnocladus dioicus | Kentucky coffeetree | Little 1977 | |
| Gymnanthes lucida | oysterwood | Little 1978 | |
| Halesia carolina | Carolina silverbell | Little 1977 | |
| Halesia diptera | two wing silverbell (two-wing silverbell) | Little 1977 | |
| Halesia parviflora (Halesia carolina) | little silverbell (Carolina silverbell) | Little 1977 | |
| Hamamelis virginiana | witch hazel (American witchhazel) | Little 1977 | |
| Hamelia patens | scarletbush | Little 1978 | |
| Helietta parvifolia | barreta | Little 1976 | |
| Hippomane mancinella | manchineel | Little 1978 | |
| Holacantha emoryi | holacantha (crucifixion thorn) | Little 1976 | |
| Hypelate trifoliata | hypelate (inkwood) | Little 1978 | |
| Ilex ambigua | Carolina holly | Little 1977 | |
| Ilex amelanchier | sarvis holly | Little 1977 | |
| Ilex cassine | dahoon | Little 1977 | |
| Ilex coriacea | large gallberry | Little 1977 | |
| Ilex decidua | possumhaw | Little 1977 | |
| Ilex krugiana | tawnyberry holly | Little 1978 | |
| Ilex laevigata | smooth winterberry | Little 1977 | |
| Ilex longipes | Georgia holly | Little 1978 | |
| Ilex montana | mountain winterberry | Little 1977 | |
| Ilex myrtifolia | myrtle dahoon | Little 1977 | |
| Ilex opaca | American holly | Little 1971 | |
| Ilex verticillata | common winterberry | Little 1977 | |
| Ilex vomitoria | yaupon | Little 1977 | |
| Illicium floridanum | Florida anise tree (Florida anisetree) | Little 1977 | |
| Illicium parviflorum | yellow anise tree (yellow anisetree) | Little 1977 | |
| Jacquinia keyensis | joewood | Little 1978 | |
| Juglans californica | California walnut | Little 1976 | |
| Juglans cinerea | butternut | Little 1971 | |
| Juglans hindsii | Hinds walnut (northern California black walnut) | Little 1976 | |
| Juglans major | Arizona walnut | Little 1976 | |
| Juglans microcarpa | little walnut | Little 1976 | |
| Juglans nigra | black walnut | Little 1971 | |
| Juniperus ashei | Ashe's juniper | Little 1971 | |
| Juniperus californica | California juniper | Little 1971 | |
| Juniperus communis | common juniper | Little 1971 | |
| Juniperus deppeana | alligator juniper | Little 1971 | |
| Juniperus erythrocarpa (Juniperus pinchotii) | redberry juniper (Pinchot's juniper) | Little 1981 | |
| Juniperus flaccida | drooping juniper | Little 1971 | |
| Juniperus horizontalis | creeping juniper | Little 1971 | |
| Juniperus monosperma | one seed juniper (oneseed juniper) | Little 1971 | |
| Juniperus occidentalis | western juniper | Little 1971 | |
| Juniperus osteosperma | Utah juniper | Little 1971 | |
| Juniperus pinchotii | Pinchot juniper | Little 1971 | |
| Juniperus scopulorum | Rocky Mountain juniper | Little 1971 | |
| Juniperus silicicola (Juniperus virginiana var. silicola, see Juniperus virginiana) | southern redcedar | Little 1971 | |
| Juniperus virginiana | eastern redcedar | Little 1971 | |
| Kalmia latifolia | mountain laurel | Little 1977 | |
| Koeberlinia spinosa | allthorn (crown of thorns) | Little 1976 | |
| Krugiodendron ferreum | leadwood | Little 1978 | |
| Laguncularia racemosa | white mangrove | Little 1978 | |
| Larix laricina | tamarack | Little 1971 | |
| Larix lyallii | subalpine larch | Little 1971 | |
| Larix occidentalis | western larch | Little 1971 | |
| Larrea divaricata (Larrea tridentata) | creosote bush | Yang 1970 | |
| Leitneria floridana | corkwood | Little 1977 | |
| Leucaena pulverulenta | great leadtree | Little 1976 | |
| Leucaena retusa | littleleaf leadtree | Little 1976 | |
| Libocedrus decurrens (Calocedrus decurrens) | incense cedar (incense-cedar) | Little 1971 | |
| Licaria triandra | Florida licaria (pepperleaf sweetwood) | Little 1978 | |
| Liquidambar styraciflua | sweetgum | Little 1971 | |
| Liriodendron tulipifera | yellow poplar (yellow-poplar) | Little 1971 | |
| Lithocarpus densiflorus (Notholithocarpus densiflorus) | tanoak | Little 1971 | |
| Lyonia ferruginea | tree lyonia (rusty staggerbush) | Little 1977 | |
| Lyonothamnus floribundus | Lyontree (Catalina ironwood) | Little 1976 | |
| Lysiloma latisiliquum | Bahama lysiloma (false tamarind) | Little 1978 | |
| Lysiloma microphylla (Lysiloma divaricata) | littleleaf lysiloma (quebracho) | Little 1976 | |
| Maclura pomifera | Osage orange (osage-orange) | Little 1971 | |
| Magnolia acuminata | cucumbertree (cucumber-tree) | Little 1971 | |
| Magnolia ashei | Ashe's magnolia | Little 1977 | |
| Magnolia fraseri | Fraser magnolia (mountain magnolia) | Little 1977 | |
| Magnolia grandiflora | southern magnolia | Little 1971 | |
| Magnolia macrophylla | bigleaf magnolia | Little 1977 | |
| Magnolia pyramidata | pyramid magnolia | Little 1977 | |
| Magnolia tripetala | umbrella magnolia (umbrella-tree) | Little 1977 | |
| Magnolia virginiana | sweetbay | Little 1971 | |
| Malus angustifolia | southern crab apple | Little 1977 | |
| Malus coronaria | sweet crab apple | Little 1977 | |
| Malus diversifolia (Malus fusca) | Oregon crab apple | Little 1976 | |
| Malus ioensis | prairie crab apple | Little 1977 | |
| Manilkara bahamensis (Manilkara jaimiqui subsp. emarginata) | wild dilly | Little 1978 | |
| Mastichodendron foetidissimum (Sideroxylon foetidissimum) | false mastic | Little 1978 | |
| Maytenus phyllanthoides | Florida mayten | Little 1978 | |
| Metopium toxiferum | Florida poisontree (poisonwood) | Little 1978 | |
| Morus microphylla | Texas mulberry | Little 1976 | |
| Morus rubra | red mulberry | Little 1971 | |
| Myrcianthes fragrans | twinberry stopper (twinberry) | Little 1978 | |
| Myrica californica (Morella californica) | Pacific bayberry (California wax myrtle) | Little 1976 | |
| Myrica cerifera (Morella cerifera) | southern bayberry (wax myrtle) | Little 1977 | |
| Myrica heterophylla (Morella caroliniensis) | evergreen bayberry (southern bayberry) | Little 1977 | |
| Myrica inodora (Morella inodora) | odorless bayberry (scentless bayberry) | Little 1977 | |
| Myrica pensylvanica (Morella pensylvanica) | northern bayberry | Little 1977 | |
| Nectandra coriacea | Florida nectandra (lancewood) | Little 1978 | |
| Nemopanthus collinus (Ilex collina) | mountain holly (longstalk holly) | Little 1977 | |
| Nolina bigelovii | Bigelow's nolina | Little 1976 | |
| Nyssa aquatica | water tupelo | Little 1971 | |
| Nyssa ogeche | Ogeechee tupelo | Little 1971 | |
| Nyssa sylvatica | black tupelo (blackgum) | Little 1971 | |
| Olneya tesota | tesota (desert ironwood) | Little 1976 | |
| Opuntia fulgida (Cylindropuntia fulgida) | jumping cholla | Little 1976 | |
| Osmanthus americanus | devilwood | Little 1977 | |
| Ostrya chisosensis | Chisos hophornbean | Little 1976 | |
| Ostrya knowltonii | Knowlton's hophornbeam | Little 1976 | |
| Ostrya virginiana | eastern hophornbeam | Little 1971 | |
| Oxydendrum arboreum | sourwood | Little 1977 | |
| Parkinsonia aculeata | Jerusalem thorn | Little 1976 | |
| Persea borbonia | redbay | Little 1977 | |
| Photinia arbutifolia (Heteromeles arbutifolia) | Christmas berry (toyon ) | Little 1976 | |
| Picea breweriana | Brewer spruce | Little 1971 | |
| Picea chihuahuana | Chihuahuan spruce | Gordon 1968 | |
| Picea engelmannii | Engelmann spruce | Little 1971 | |
| Picea glauca | white spruce | Little 1971 | |
| Picea mariana | black spruce | Little 1971 | |
| Picea pungens | blue spruce | Little 1971 | |
| Picea rubens | red spruce | Little 1971 | |
| Picea sitchensis | Sitka spruce | Little 1971 | |
| Picramnia pentandra | bitterbush (Florida bitterbush) | Little 1978 | |
| Pinckneya pubens | pinckneya (fevertree) | Little 1977 | |
| Pinus albicaulis | whitebark pine | Little 1971 | |
| Pinus aristata | bristlecone pine | Little 1971 | |
| Pinus attenuata | knobcone pine | Little 1971 | |
| Pinus ayacahuite (Pinus strobiformis) | Mexican white pine (southwestern white pine) | Critchfield and Little 1966 | |
| Pinus balfouriana | foxtail pine | Little 1971 | |
| Pinus banksiana | jack pine | Little 1971 | |
| Pinus caribaea | Caribbean pine | Critchfield and Little 1966 | |
| Pinus cembroides | Mexican pinyon | Little 1971 | |
| Pinus clausa | sand pine | Little 1971 | |
| Pinus contorta | lodgepole pine | Little 1971 | |
| Pinus contorta var. contorta | shore pine | ||
| Pinus contorta var. latifolia | Rocky Mountain lodgepole pine | ||
| Pinus contorta var. murrayana | Sierra lodgepole pine | ||
| Pinus cooperi | Cooper pine | Critchfield and Little 1966 | |
| Pinus coulteri | Coulter pine | Little 1971 | |
| Pinus cubensis | Cuban pine | Critchfield and Little 1966 | |
| Pinus culminicola (Pinus discolor) | Potosi pinyon (border pinyon) | Critchfield and Little 1966 | |
| Pinus douglasiana | Douglas pine | Critchfield and Little 1966 | |
| Pinus durangensis | Durango pine | Critchfield and Little 1966 | |
| Pinus echinata | shortleaf pine | Little 1971 | |
| Pinus edulis | pinyon (Colorado pinyon, twoneedle pinyon) | Little 1971 | |
| Pinus elliottii | slash pine | Little 1971 | |
| Pinus engelmannii | Apache pine | Little 1971 | |
| Pinus flexilis | limber pine | Little 1971 | |
| Pinus glabra | spruce pine | Little 1971 | |
| Pinus greggii | Gregg pine | Critchfield and Little 1966 | |
| Pinus hartwegii | Hartweg pine | Critchfield and Little 1966 | |
| Pinus jeffreyi | Jeffrey pine | Little 1971 | |
| Pinus lambertiana | sugar pine | Little 1971 | |
| Pinus lawsonii | Lawson pine | Critchfield and Little 1966 | |
| Pinus leiophylla, see Pinus leiophylla var. chihuahuana | Chihuahuan pine | Little (1971), Critchfield and Little (1966) | |
| Pinus longaeva | Intermountain bristlecone pine (Great Basin bristlecone pine) | Bailey, 1970; Little, 1971 | |
| Pinus lumholtzii | Lumholtz pine | Critchfield and Little 1966 | |
| Pinus maximartinezii | Martinez pinyon (maxipiñon) | Critchfield and Little 1966 | |
| Pinus michoacana | Michoacan pine | Critchfield and Little 1966 | |
| Pinus monophylla | singleleaf pinyon | Little 1971 | |
| Pinus monticola | western white pine | Little 1971 | |
| Pinus montezumae | Montezuma pine | Critchfield and Little 1966 | |
| Pinus muricata | bishop pine | Little 1971 | |
| Pinus nelsonii | Nelson pinyon | Critchfield and Little 1966 | |
| Pinus occidentalis | West Indian pine | Critchfield and Little 1966 | |
| Pinus oocarpa | Nicaraguan pitch pine (ocote chino ) | Critchfield and Little 1966 | |
| Pinus palustris | longleaf pine | Little 1971 | |
| Pinus patula | Mexican weeping pine | Critchfield and Little 1966 | |
| Pinus pinceana | Pince pinyon | Critchfield and Little 1966 | |
| Pinus ponderosa | ponderosa pine | Little 1971 | |
| Pinus ponderosa var. brachyptera | southwestern ponderosa pine | ||
| Pinus ponderosa var. benthamiana | Pacific ponderosa pine | ||
| Pinus ponderosa var. ponderosa | Columbia ponderosa pine | ||
| Pinus ponderosa var. scopularum | Rocky Mountain ponderosa pine | ||
| Pinus ponderosa var. washoensis | Washoe pine | ||
| Pinus pringlei | Pringle pine | Critchfield and Little 1966 | |
| Pinus pseudostrobus | false Weymouth pine | Critchfield and Little 1966 | |
| Pinus pungens | Table Mountain pine | Little 1971 | |
| Pinus quadrifolia | Parry pinyon | Little 1971 | |
| Pinus radiata | Monterey pine | Little 1971 | |
| Pinus resinosa | red pine | Little 1971 | |
| Pinus rigida | pitch pine | Little 1971 | |
| Pinus sabiniana | gray pine | Little 1971 | |
| Pinus serotina | pond pine | Little 1971 | |
| Pinus strobus | eastern white pine | Little 1971 | |
| Pinus strobiformis | southwestern white pine | Little 1971 | |
| Pinus taeda | loblolly pine | Little 1971 | |
| Pinus teocote | twisted leaves pine, Aztec pine | Critchfield and Little 1966 | |
| Pinus torreyana | Torrey pine | Little 1971 | |
| Pinus tropicalis | tropical pine | Critchfield and Little 1966 | |
| Pinus virginiana | Virginia pine | Little 1971 | |
| Pinus washoensis (Pinus ponderosa var. washoensis) | Washoe pine | Little 1971 | |
| Piscidia piscipula | Florida fishpoison tree | Little 1978 | |
| Pisonia rotundata | pisonia (smooth devil's-claws) | Little 1978 | |
| Pistacia texana (Pistacia mexicana) | Texas pistache (American pistachio) | Little 1976 | |
| Pithecellobium flexicaule (Ebenopsis ebano) | ebony blackbead (Texas-ebony) | Little 1976 | |
| Pithecellobium guadalupense (Pithecellobium keyense) | Guadeloupe blackbead (Florida Keys blackbead) | Little 1978 | |
| Pithecellobium pallens (Havardia pallens) | huajillo (haujillo) | Little 1976 | |
| Pithecellobium unguis-cati | catclaw blackbead | Little 1978 | |
| Planera aquatica | planertree | Little 1977 | |
| Platanus occidentalis | American sycamore | Little 1971 | |
| Platanus racemosa | California sycamore | Little 1976 | |
| Platanus wrightii | Arizona sycamore | Little 1976 | |
| Populus angustifolia | narrowleaf cottonwood | Little 1976 | |
| Populus arizonica (Populus fremontii subsp. fremontii, see Populus fremontii) | Arizona cottonwood (Fremont cottonwood) | Little 1976 | |
| Populus balsamifera (Populus balsamifera subsp. balsamifera) | balsam poplar | Little 1971 | |
| Populus deltoides | eastern cottonwood | Little 1971 | |
| Populus fremontii | Fremont cottonwood | Little 1971 | |
| Populus grandidentata | bigtooth aspen | Little 1971 | |
| Populus heterophylla | swamp cottonwood | Little 1971 | |
| Populus hinckleyana | Hinckley cottonwood | Little 1976 | |
| Populus tremuloides | quaking aspen | Little 1971 | |
| Populus trichocarpa (Populus balsamifera subsp. trichocarpa) | black cottonwood | Little 1971 | |
| Prosopis juliflora (misapplied, in part; taxa in United States are Prosopis glandulosa var. glandulosa) | mesquite (honey mesquite) | Little 1976 | |
| Prosopis pubescens | screwbean mesquite | Little 1976 | |
| Prunus alleghaniensis | Allegheny plum | Little 1977 | |
| Prunus americana | American plum | Little 1976, 1977 | |
| Prunus angustifolia | Chickasaw plum | Little 1976, 1977 | |
| Prunus caroliniana | Carolina laurelcherry | Little 1977 | |
| Prunus emarginata | bitter cherry | Little 1976 | |
| Prunus fremontii | desert apricot | Little 1976 | |
| Prunus hortulana | hortulan plum | Little 1977 | |
| Prunus ilicifolia | hollyleaf cherry | Little 1976 | |
| Prunus lyonii (Prunus ilicifolia subsp. lyonii) | Catalina cherry | Little 1976 | |
| Prunus mexicana | Mexican plum | Little 1977 | |
| Prunus munsoniana | wildgoose plum (wild goose plum ) | Little 1977 | |
| Prunus myrtifolia | West Indies cherry | Little 1978 | |
| Prunus nigra | Canada plum (Canadian plum) | Little 1977 | |
| Prunus pensylvanica | pin cherry | Little 1976, 1977 | |
| Prunus serotina | black cherry | Little 1971 | |
| Prunus subcordata | Klamath plum | Little 1976 | |
| Prunus umbellata | flatwoods plum (hog plum) | Little 1977 | |
| Prunus virginiana | common chokecherry (chokecherry) | Little 1976, 1977 | |
| Pseudotsuga macrocarpa | bigcone Douglas fir (bigcone Douglas-fir) | Little 1971 | |
| Pseudotsuga menziesii | Douglas fir (Douglas-fir) | Little 1971 | |
| Pseudotsuga menziesii var. glauca | Rocky Mountain Douglas-fir | ||
| Pseudotsuga menziesii var. menziesii | coast Douglas-fir | ||
| Pseudophoenix sargentii | buccaneer palm (Florida cherry palm ) | Little 1978 | |
| Psidium longipes | long stalk stopper (mangroveberry) | Little 1978 | |
| Ptelea crenulata | California hoptree | Little 1976 | |
| Ptelea trifoliata | common hoptree | Little 1976 | |
| Quercus agrifolia | California live oak | Little 1971 | |
| Quercus ajoensis | Ajo oak (Ajo Mountain scrub oak) | Little 1976 | |
| Quercus alba | white oak | Little 1971 | |
| Quercus arizonica | Arizona white oak | Little 1976 | |
| Quercus arkansana | Arkansas oak | Little 1977 | |
| Quercus bicolor | swamp white oak | Little 1971 | |
| Quercus chapmanii | Chapman oak | Little 1977 | |
| Quercus chrysolepis | canyon live oak | Little 1971 | |
| Quercus coccinea | scarlet oak | Little 1971 | |
| Quercus douglasii | blue oak | Little 1971 | |
| Quercus dunnii (Quercus palmeri) | Dunn oak (Palmer oak) | Little 1976 | |
| Quercus durandii (Quercus sinuata var. sinuata) | Durand oak (bastard oak) | Little 1977 | |
| Quercus ellipsoidalis | northern pin oak | Little 1971 | |
| Quercus emoryi | Emory oak | Little 1971 | |
| Quercus engelmannii | Engelmann oak | Little 1976 | |
| Quercus falcata | southern red oak | Little 1971 | |
| Quercus gambelii | Gambel oak | Little 1971 | |
| Quercus garryana | Oregon white oak | Little 1971 | |
| Quercus georgiana | Georgia oak | Little 1977 | |
| Quercus glaucoides (Quercus laceyi) | Lacey oak | Little 1976 | |
| Quercus graciliformis | Chisos oak | Little 1976 | |
| Quercus gravesii | Graves oak, including Quercus tardifolia, lateleaf oak | Little 1976 | |
| Quercus grisea | gray oak | Little 1976 | |
| Quercus havardii | Havard oak | Little 1976 | |
| Quercus hypoleucoides | silverleaf oak | Little 1976 | |
| Quercus ilicifolia | bear oak | Little 1977 | |
| Quercus imbricaria | shingle oak | Little 1977 | |
| Quercus incana | bluejack oak | Little 1977 | |
| Quercus kelloggii | California black oak | Little 1971 | |
| Quercus laevis | turkey oak | Little 1977 | |
| Quercus laurifolia | laurel oak | Little 1971 | |
| Quercus lobata | California white oak (valley oak) | Little 1971 | |
| Quercus lyrata | overcup oak | Little 1971 | |
| Quercus macdonaldii (Quercus x macdonaldii) | McDonald oak | Little 1976 | |
| Quercus macrocarpa | bur oak | Little 1971 | |
| Quercus marilandica | blackjack oak | Little 1971 | |
| Quercus michauxii | swamp chestnut oak | Little 1971 | |
| Quercus mohriana | Mohrs oak | Little 1976 | |
| Quercus muehlenbergii | chinkapin oak (chinquapin oak) | Little 1971 | |
| Quercus myrtifolia | myrtle oak | Little 1977 | |
| Quercus nigra | water oak | Little 1971 | |
| Quercus nuttallii (Quercus texana) | Nuttall oak | Little 1971 | |
| Quercus oblongifolia | Mexican blue oak | Little 1976 | |
| Quercus oglethorpensis | Oglethorpe oak | Little 1977 | |
| Quercus palustris | pin oak | Little 1971 | |
| Quercus phellos | willow oak | Little 1971 | |
| Quercus prinus | chestnut oak | Little 1971 | |
| Quercus pungens | sandpaper oak (pungent oak ) | Little 1976 | |
| Quercus rubra | northern red oak | Little 1971 | |
| Quercus rugosa | netleaf oak | Little 1976 | |
| Quercus shumardii | Shumard oak | Little 1971 | |
| Quercus stellata | post oak | Little 1971 | |
| Quercus tomentella | island live oak | Little 1976 | |
| Quercus toumeyi | Toumey oak | Little 1976 | |
| Quercus turbinella | shrub live oak (Sonoran scrub oak) | Little 1976 | |
| Quercus velutina | black oak | Little 1971 | |
| Quercus virginiana | live oak (southern live oak ) | Little 1971 | |
| Quercus wislizeni | interior live oak | Little 1976 | |
| Rapanea punctata (Myrsine cubana) | Florida rapanea (Guianese colicwood) | Little 1978 | |
| Reynosia septentrionalis | darling plum (darlingplum) | Little 1978 | |
| Rhamnus betulaefolia (Rhamnus betulifolia) (Frangula betulifolia) | birchleaf buckthorn (beechleaf frangula) | Little 1976 | |
| Rhamnus californica (Frangula californica) | California buckthorn (California coffeeberry) | Little 1976 | |
| Rhamnus caroliniana (Frangula caroliniana) | Carolina buckthorn | Little 1977 | |
| Rhamnus crocea | hollyleaf buckthorn (redberry buckthorn) | Little 1976 | |
| Rhamnus purshiana (Frangula purshiana) | Cascara buckthorn | Little 1971 | |
| Rhizophora mangle | mangrove (red mangrove) | Little 1971, 1978 | |
| Rhododendron catawbiense | Catawba rhododendron (Catawba rosebay) | Little 1977 | |
| Rhododendron macrophyllum | Pacific rhododendron | Little 1976 | |
| Rhododendron maximum | rosebay rhododendron (great laurel) | Little 1977 | |
| Rhus choriophylla (Rhus virens var. choriophylla) | Mearns sumac (evergreen sumac) | Little 1976 | |
| Rhus copallina (Rhus copallinum) | shining sumac (winged sumac) | Little 1977 | |
| Rhus glabra | smooth sumac | Little 1976, 1977 | |
| Rhus integrifolia | lemonade sumac | Little 1976 | |
| Rhus kearneyi | Kearney's sumac | Little 1976 | |
| Rhus lanceolata | prairie sumac | Little 1976 | |
| Rhus laurina (Malosma laurina) | laurel sumac | Little 1976 | |
| Rhus microphylla | littleleaf sumac | Little 1976 | |
| Rhus ovata | sugar sumac | Little 1976 | |
| Rhus typhina | staghorn sumac | Little 1977 | |
| Robinia kelseyi (Robinia hispida var. kelseyi) | Kelsey's locust | Little 1977 | |
| Robinia neomexicana | New Mexican locust | Little 1976 | |
| Robinia pseudoacacia | black locust | Little 1971 | |
| Robinia viscosa | clammy locust | Little 1977 | |
| Roystonea elata | Florida royalpalm (royal palm) | Little 1978 | |
| Sabal mexicana | Mexican palmetto (Rio Grande palmetto) | Little 1976 | |
| Sabal minor | dwarf palmetto | Little 1977 | |
| Sabal palmetto | cabbage palmetto | Little 1971 | |
| Salix alaxensis | feltleaf willow | Little 1976 | |
| Salix amygdaloides | peachleaf willow | Little 1971 | |
| Salix arbusculoides | peachleaf willow (littletree willow) | Little 1976 | |
| Salix bebbiana | Bebb willow | Little 1976, 1977 | |
| Salix bonplandiana | Bonpland willow | Little 1976 | |
| Salix caroliniana | coastal plain willow | Little 1977 | |
| Salix discolor | pussy willow | Little 1976, 1977 | |
| Salix exigua | coyote willow (narrowleaf willow ) | Little 1976, 1977 | |
| Salix floridana | Florida willow | Little 1977 | |
| Salix fluviatilis (Salix melanopsis) | river willow (dusky willow) | Little 1976 | |
| Salix geyeriana | Geyer willow | Little 1976 | |
| Salix hindsiana (Salix exigua) | Hinds willow (narrowleaf willow) | Little 1976 | |
| Salix hookeriana | Hooker willow (dune willow) | Little 1976 | |
| Salix laevigata | red willow | Little 1976 | |
| Salix lasiandra (Salix lucida subsp. lasiandra) | Pacific willow | Little 1976 | |
| Salix lasiolepis | arroyo willow | Little 1976 | |
| Salix lucida (map applies to only Salix lucida subsp. lucida) | shining willow | Little 1977 | |
| Salix mackenzieana | Mackenzie's willow | Little 1976 | |
| Salix nigra | black willow | Little 1971, 1976 | |
| Salix pellita | satiny willow | Little 1977 | |
| Salix petiolaris | meadow willow | Little 1976, 1977 | |
| Salix pyrifolia | balsam willow | Little 1977 | |
| Salix scouleriana | Scouler willow | Little 1976 | |
| Salix sericea | silky willow | Little 1977 | |
| Salix sessilifolia | northwest willow (northwest sandbar willow) | Little 1976 | |
| Salix sitchensis | Sitka willow | Little 1976 | |
| Salix taxifolia | yewleaf willow | Little 1976 | |
| Salix tracyi | Tracy's willow | Little 1976 | |
| Sambucus callicarpa (Sambucus racemosa var. racemosa) | Pacific red elder (red elderberry ) | Little 1976 | |
| Sambucus canadensis (Sambucus nigra subsp. canadensis) | American elder (American black elderberry) | Little 1977 | |
| Sambucus glauca (Sambucus nigra subsp. cerulea) | blueberry elder (blue elderberry) | Little 1976 | |
| Sambucus melanocarpa (Sambucus racemosa var. melanocarpa, see Sambucus racemosa) | blackbead elder (Rocky Mountain elder) | Little 1976 | |
| Sambucus mexicana (Sambucus nigra subsp. canadensis) | Mexican elder (American black elderberry) | Little 1976 | |
| Sambucus velutina (Sambucus nigra subsp. cerulea) | velvet elder (blue elderberry) | Little 1976 | |
| Sapium biloculare | jumping bean sapium (arrow poision plant) | Little 1976 | |
| Sapindus drummondii (Sapindus saponaria subsp. drummonii) | western soapberry | Little 1976, 1977 | |
| Sapindus saponaria | wingleaf soapberry | Little 1977, 1978 | |
| Sassafras albidum | sassafras | Little 1971 | |
| Savia bahamensis | maidenbush (Bahama maidenbush) | Little 1978 | |
| Schaefferia frutescens | Florida boxwood | Little 1978 | |
| Schoepfia chrysophylloides (Schoepfia schreberi) | graytwig (gulf graytwig) | Little 1978 | |
| Sequoiadendron giganteum | giant sequoia | Little 1971 | |
| Sequoia sempervirens | redwood | Little 1971 | |
| Serenoa repens | saw palmetto | Little 1977 | |
| Shepherdia argentea | silver buffaloberry | Little 1977, 1976 | |
| Simarouba glauca | paradise tree (paradisetree) | Little 1978 | |
| Solanum erianthum | mullein nightshade (potatotree) | Little 1977, 1978 | |
| Sophora affinis (Styphnolobium affine) | Texas sophora (Eve's necklacepod) | Little 1977 | |
| Sophora secundiflora | mescalbean (mescal bean) | Little 1976 | |
| Sorbus americana | American mountain ash (American mountain-ash) | Little 1977 | |
| Sorbus decora | showy mountain ash (northern mountain-ash) | Little 1977 | |
| Sorbus scopulina | Greene mountain ash (Greene's mountain-ash) | Little 1976 | |
| Sorbus sitchensis | Sitka mountain ash (Sitka mountain-ash) | Little 1976 | |
| Staphylea bolanderi | Sierra bladdernut | Little 1976 | |
| Staphylea trifolia | American bladdernut | Little 1977 | |
| Stewartia malacodendron | Virginia stewartia | Little 1977 | |
| Stewartia ovata | mountain stewartia | Little 1977 | |
| Styrax americana (Styrax americanus) | American snowbell | Little 1977 | |
| Styrax grandifolia (Styrax grandifolius) | bigleaf snowbell | Little 1977 | |
| Styrax platanifolia | sycamore leaf snowbell (sycamoreleaf snowbell) | Little 1977 | |
| Suriana maritima | baycedar (bay cedar) | Little 1978 | |
| Swietenia mahagoni | West Indies mahogany | Little 1971, 1978 | |
| Symplocos tinctoria | common sweetleaf | Little 1977 | |
| Taxodium distichum | baldcypress (bald cypress) | Little 1971 | |
| Taxodium mucronatum | Montezuma baldcypress (Montezuma bald cypress) | Little 1971 | |
| Taxus brevifolia | Pacific yew | Little 1971 | |
| Taxus canadensis | Canada yew | Little 1971 | |
| Taxus floridana | Florida yew | Little 1971 | |
| Tetrazygia bicolor | Florida tetrazygia (Florida clover ash) | Little 1978 | |
| Thrinax morrisii (Leucothrinax morrisii) | key thatchpalm (Key thatch palm) | Little 1978 | |
| Thrinax radiata | Florida thatchpalm (Florida thatch palm) | Little 1978 | |
| Thuja occidentalis | northern white cedar (northern white-cedar) | Little 1971 | |
| Thuja plicata | western redcedar | Little 1971 | |
| Tilia americana | American basswood | Little 1971 | |
| Tilia caroliniana (Tilia americana var. caroliniana, see Tilia americana) | Carolina basswood | Little 1977 | |
| Tilia heterophylla (Tilia americana var. heterophylla, see Tilia americana) | white basswood (American basswood) | Little 1971 | |
| Torreya californica | California torreya (California nutmeg) | Little 1971 | |
| Torreya taxifolia | Florida torreya | Little 1971 | |
| Toxicodendron vernix | poison sumac | Little 1977 | |
| Trema lamarckiana | West Indies trema (Lamarck's trema) | Little 1978 | |
| Trema micrantha | Florida trema (Jamaican nettletree) | Little 1978 | |
| Tsuga canadensis | eastern hemlock | Little 1971 | |
| Tsuga caroliniana | Carolina hemlock | Little 1971 | |
| Tsuga heterophylla | western hemlock | Little 1971 | |
| Tsuga mertensiana | mountain hemlock | Little 1971 | |
| Ulmus alata | winged elm | Little 1971 | |
| Ulmus americana | American elm | Little 1971 | |
| Ulmus crassifolia | cedar elm (cedar-elm) | Little 1971 | |
| Ulmus rubra | slippery elm | Little 1971 | |
| Ulmus serotina | September elm | Little 1971 | |
| Ulmus thomasii | rock elm | Little 1971 | |
| Umbellularia californica | California laurel | Little 1971 | |
| Ungnadia speciosa | Mexican buckeye | Little 1976 | |
| Vaccinium arboreum | tree sparkleberry (farkleberry) | Little 1977 | |
| Vauquelinia californica | Torrey vauquelinia (Arizona rosewood) | Little 1976 | |
| Vauquelinia pauciflora (Vauquelinia californica subsp. pauciflora) | fewflower vauquelinia (Arizona rosewood) | Little 1976 | |
| Viburnum lentago | nannyberry | Little 1976, 1977 | |
| Viburnum nudum | possumhaw viburnum | Little 1977 | |
| Viburnum obovatum | Walter viburnum (small-leaf arrowwood) | Little 1977 | |
| Viburnum prunifolium | blackhaw | Little 1977 | |
| Viburnum rufidulum | rusty blackhaw | Little 1977 | |
| Viburnum trilobum | American cranberrybush | Little 1976, 1977 | |
| Washingtonia filifera | California washingtonia (California fan palm) | Little 1976 | |
| Ximenia americana | tallowwood (tallow wood) | Little 1978 | |
| Yucca aloifolia | aloe yucca | Little 1977 | |
| Yucca brevifolia | Joshua tree | Little 1976 | |
| Yucca carnerosana (Yucca faxoniana) | Carneros yucca (Eve's needle) | Little 1976 | |
| Yucca elata | soaptree yucca | Little 1976 | |
| Yucca faxoniana | Faxon yucca (Eve's needle) | Little 1976 | |
| Yucca gloriosa | moundlily yucca | Little 1977 | |
| Yucca mohavensis | Mohave yucca | Little 1976 | |
| Yucca rostrata (Yucca thompsoniana) | beaked yucca (Thompson's yucca) | Little 1976 | |
| Yucca schottii (Yucca x schottii) | Schott's yucca | Little 1976 | |
| Yucca torreyi | Torrey's yucca | Little 1976 | |
| Yucca treculeana | Trecul yucca (Don Quixote's lace) | Little 1976 | |
| Zanthoxylum americanum | common prickly ash (common pricklyash) | Little 1977 | |
| Zanthoxylum clava-herculis | Hercules' club | Little 1977 | |
| Zanthoxylum coriaceum | Biscayne prickly ash (Biscayne pricklyash) | Little 1978 | |
| Zanthoxylum fagara | lime prickly ash (lime pricklyash) | Little 1977, 1978 | |
| Zanthoxylum flavum | West Indies satinwood (West Indian satinwood) | Little 1978 | |
| Zanthoxylum hirsutum | Texas Hercules' club | Little 1977 |
References
Benson, Lyman; Darrow, Robert A. 1981. The trees and shrubs of the Southwestern deserts. Tucson, AZ: The University of Arizona Press. [18066]
Critchfield, William B.; Little, Elbert L., Jr. 1966. Geographic distribution of the pines of the world. Misc. Publ. 991. Washington, DC: U.S. Department of Agriculture, Forest Service. 97 p. [20314]
Gordon, Alan G. 1968. Ecology of Picea chihuahuana Martinez. Ecology. 49(5): 880-896. [92598]
Little, Elbert L., Jr. 1971. Atlas of United States trees. Volume 1. Conifers and important hardwoods. Misc. Publ. 1146. Washington, DC: U.S. Department of Agriculture, Forest Service. 320 p. [1462]
Little, Elbert L., Jr. 1976. Atlas of United States trees. Volume 3. Minor western hardwoods. Misc. Publ. 1314. Washington, DC: U.S. Department of Agriculture, Forest Service. 13 p. [+ 290 maps]. [10430]
Little, Elbert L., Jr. 1977. Atlas of United States trees. Volume 4. Minor eastern hardwoods. Misc. Pub. No. 1342. Washington, DC: U.S. Department of Agriculture, Forest Service. 17 p. [21683]
Little, Elbert L. Jr. 1978. Atlas of United States trees. Volume 5. Florida. Misc. Publ. 1361. Washington, DC: U.S. Department of Agriculture, Forest Service. 22 p. [+ 262 maps]. [83082]
Thompson, Robert S.; Anderson, Katherine H.; Bartlein, Patrick J. 1999. Digital representations of tree species range maps from "Atlas of United States trees" by Elbert L. Little, Jr. (and other publications). In: Atlas of relations between climatic parameters and distributions of important trees and shrubs in North America. Denver, CO: U.S. Geological Survey, Information Services (Producer). On file at: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory, Missoula, MT; FEIS files. [82831]
Yang, Tien Wei. 1970. Major chromosome races of Larrea divaricata in North America. Journal of the Arizona Academy of Science. 6: 41-45. [3616]
Last updated August 28, 2025