Flora distribution maps of North America

References

These North American tree distribution maps are based primarily on the following sources, indicated in the "Mapmaker" column.

Mapmaker	Original reference
Munns (1938)	E. N. Munns (1938), The distribution of important forest trees of the United States U.S. Department of Agriculture Miscellaneous Publication 287, pp. 1-170.
Critchfield & Little (1966)	William B Critchfield & Elbert L. Little, Jr. (1966), Geographic distribution of the pines of the world: U.S. Department of Agriculture Miscellaneous Publication 991, pp. 1-97.
Little (1971)	Elbert L. Little, Jr. (1971), Atlas of United States trees, Vol. 1, conifers and important hardwoods: U.S. Department of Agriculture Miscellaneous Publication 1146, 9 p., 200 maps.
Little (1976)	Elbert L. Little, Jr. (1976), Atlas of United States trees, Vol. 3, minor Western hardwoods: U.S. Department of Agriculture Miscellaneous Publication 1314, 13 p., 290 maps.
Little (1977)	Elbert L. Little, Jr. (1977), Atlas of United States trees, Vol. 4, minor Eastern hardwoods: U.S. Department of Agriculture Miscellaneous Publication 1342, 17 p., 230 maps.
Little (1978)	Elbert L. Little, Jr. (1978), Atlas of United States trees, Vol. 5, Florida: U.S. Department of Agriculture Miscellaneous Publication 1361, 262 maps.
Little (1981)	Elbert L. Little, Jr. (1981), Atlas of United States trees, Vol. 6, Supplement: U.S. Department of Agriculture Miscellaneous Publication 1410, 31 p., 39 maps.

Digitized copies of these maps are available at USGS Geosciences and Environmental Change Science Center, Digital Representations of Tree Species Range Maps from "Atlas of United States Trees" by Elbert L. Little, Jr. (and other publications) archive copy at the Wayback Machine. The PDF files available there show a striping problem when opened with and exported from Adobe Arobat, which makes them undesirable for use as Wikipedia illustrations unless they are cleaned up. However, if the PDF files are opened and rasterized directly in Photoshop (CS6 anyway), the striping problem does not occur.

Pinus

Subgenus Strobus

White pines, soft pines.

Latin Name	English Name	Source	1971	1	2	3	4	1966	1938
Pinus albicaulis	whitebark pine, pine à blanche écorce	Little (1971)						5	5
Pinus monticola	western white pine	Little (1971)						6	2
Pinus strobus	eastern white pine	Little (1971)							1
Pinus chiapensis ≈ P. strobus chiapensis	Chiapas pine	Little (1971)
Pinus lambertiana	sugar pine	Little (1971)						7	3
Pinus flexilis	limber pine	Little (1971)						8	4
Pinus strobiformis	southwestern white pine, Chihuahua white pine	Little (1971)							6
Pinus ayacahuite	Mexican white pine	Critchfield & Little (1966)						9

Subgenus Ducampopinus

Pinyon pines, lacebark pines, foxtail pines.

Section Parrya

Subsect. Cembroides

Pinyon pines.

Latin Name	English Name	Source	0	1	2	3	1966	1938
Pinus cembroides	Mexican piñon	Little (1971)					15	7
Pinus maximartinezii	Martinez pinyon	Critchfield & Little (1966)
Pinus discolor ≈ P. cembroides bicolor ≈ P. culminicola discolor	border pinyon, piñón de la frontera
Pinus johannis	Johann's piñon
Pinus orizabensis ≈ P. cembroides orizabensis ≈ P. cembroides non Zucc.	Orizaba pinyon
Pinus remota ≈ P. cembroides remota ≈ P. catarinae	Texas pinyon, papershell pinyon
Pinus quadrifolia	Parry pinyon	Little (1971)					16
Pinus monophylla	singleleaf pinyon	Little (1971)						9
Pinus monophylla ssp. monophylla
Pinus monophylla ssp. californiarum							17
Pinus monophylla ssp. fallax
Pinus edulis	Colorado pinyon	Little (1971)						8
Pinus culminicola	Potosi pinyon	Critchfield & Little (1966)					18
Pinus pinceana	Pince pinyon	Critchfield & Little (1966)
Pinus nelsonii	Nelson pinyon	Critchfield & Little (1966)

Subsect. Balfourianae

Foxtail pines, southwest U. S.

Latin Name	English Name	Source	1971	1971-1	1971-2	1966	1938
Pinus balfouriana	foxtail pine	Little (1971)				20	10
Pinus aristata	Rocky Mountain bristlecone pine	Little (1971)				21	11
Pinus longaeva	Great Basin bristlecone pine	Bailey (1970) Little (1971)

Subgenus Pinus

Yellow pines, hard pines.

Subsect. Leiophyllae

Latin Name	English Name	Source	0	1	2	others
Pinus leiophylla	Chihuahua pine	Little (1971), Critchfield & Little (1966)				22
Pinus lumholtzii	Lumholtz pine	Critchfield & Little (1966)				23

Section Pinus

Mostly Eurasian hard pines, except for these.

Latin Name	English Name	Source	0	1	2	1966	1938
Pinus resinosa	red pine	Little (1971)				26	12
Pinus tropicalis	tropical pine	Critchfield & Little (1966)

Section Trifoliae

American hard pines.

Subsect. Australes

Latin Name	English Name	Source	0	1	2	1966	1938
Pinus palustris	longleaf pine	Little (1971)				40	25
Pinus taeda	loblolly pine	Little (1971)				41	18
Pinus echinata	shortleaf pine	Little (1971)				42	22
Pinus pungens	Table Mountain pine	Little (1971)				43
Pinus glabra	spruce pine	Little (1971)					23
Pinus rigida	pitch pine	Little (1971)				44	19
Pinus serotina	pond pine	Little (1971)					20
Pinus elliottii	slash pine	Little (1971)			45	45	26
Pinus caribaea	Caribbean pine	Critchfield & Little (1966)				44
Pinus occidentalis	West Indian pine, Hispaniolan pine	Critchfield & Little (1966)
Pinus cubensis	Cuban pine	Critchfield & Little (1966)

Subsect. Ponderosae

Latin Name	English Name	Source	1971	1	2	1966	1938
Pinus ponderosa	ponderosa pine	Little (1971)				47	13
Pinus arizonica	Arizona pine	Little (1971)
Pinus washoensis	Washoe pine	Little (1971)				48	14
Pinus jeffreyi	Jeffrey pine	Little (1971)
Pinus engelmannii	Apache pine	Little (1971)				49
Pinus montezumae	Montezuma pine	Critchfield & Little (1966)
Pinus durangensis	Durango pine	Critchfield & Little (1966)				50
Pinus michoacana Pinus devoniana	Michoacan pine, Pino michoacano	Critchfield & Little (1966)
Pinus hartwegii	Hartweg pine	Critchfield & Little (1966)				51
Pinus cooperi	Cooper pine	Critchfield & Little (1966)
Pinus pseudostrobus	False Weymouth pine	Critchfield & Little (1966)				52
Pinus douglasiana = Pinus gordoniana	Douglas pine	Critchfield & Little (1966)
Pinus teocote	Twisted leaves pine; Aztec pine	Critchfield & Little (1966)				53
Pinus lawsonii	Lawson pine	Critchfield & Little (1966)
Pinus sabiniana	Foothill pine	Little (1971)				54	16
Pinus torreyana	Torrey pine	Little (1971)				55
Pinus coulteri	Coulter pine	Little (1971)					17

Subsect. Contortae

Latin Name	English Name	Source	0	1	2	1966	1938
Pinus banksiana	jack pine	Little (1971)				56	24
Pinus contorta	lodgepole pine	Little (1971)					15
Pinus virginiana	Virginia pine	Little (1971)				57	21
Pinus clausa	sand pine	Little (1971)

Subsect. Oocarpae

Latin Name	English Name	Source	0	1	2	original
Pinus attenuata	knobcone pine	Little (1971)				58
Pinus radiata	Monterey pine	Little (1971)				58
Pinus muricata	bishop pine	Little (1971)				59
Pinus greggii	Gregg pine	Critchfield & Little (1966)				60
Pinus patula	Mexican weeping pine	Critchfield & Little (1966)
Pinus tecunumanii[2] archive copy at the Wayback Machine ≈ P. oocarpa ochoterenae ≈ P. patula tecunumanii	Schwerdtfeger's pine, Tecun Uman pine
Pinus pringlei	Pringle pine	Critchfield & Little (1966)				61
Pinus oocarpa	Nicaraguan pitch pine; ocote pine	Critchfield & Little (1966)

Larix

Latin Name	English Name	Source	1971	1	2	3	4	5	1966
Larix laricina	tamarack	Little (1971)							27
Larix occidentalis	western larch	Little (1971)							28
Larix lyallii	subalpine larch	Little (1971)

Picea

Latin Name	English Name	Mapmaker	1971	1	2	3	4	5	1938
Picea mariana	black spruce	Little (1971)							29
Picea rubens	red spruce	Little (1971)							30
Picea glauca	white spruce	Little (1971)							31
Picea engelmannii	Engelmann spruce	Little (1971)							32
Picea pungens	blue spruce	Little (1971)							33
Picea sitchensis	Sitka spruce	Little (1971)							34
Picea breweriana	Brewer spruce	Little (1971)
Picea chihuahuana	Chihuahua spruce	Gordon (1968)
Picea martinezii	Martinez spruce	Gordon (1968)

Tsuga

Latin Name	English Name	Source	1971	1	2	3	4	5	6	1938
Tsuga canadensis	eastern hemlock	Little (1971)
Tsuga caroliniana	Carolina hemlock	Little (1971)
Tsuga heterophylla	western hemlock	Little (1971)
Tsuga mertensiana	mountain hemlock	Little (1971)

Pseudotsuga

Latin Name	English Name	Mapmaker	1971	1	1938
Pseudotsuga macrocarpa	bigcone Douglas fir	Little (1971) Munns (1938)
Pseudotsuga menziesii	Douglas fir	Little (1971)

Abies

Latin Name	English Name	Source	1971	1	2	3/4	5	1938
Abies amabilis	Pacific silver fir	Little (1971) 1
Abies balsamea	balsam fir	Little (1971) Munns (1938) 40
Abies fraseri	Fraser fir	Little (1971)
Abies bracteata	bristlecone fir	Little (1971)
Abies concolor	white 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

Latin Name	English Name	Mapmaker	0	1	2	Original maps
Acacia berlandieri	Berlandier acacia	Little (1976)
Acacia greggii greggii  ≈ Senegalia greggii	catclaw acacia	Little (1976)
Acacia greggii wrightii  ≈ Acacia wrightii  ≈ Senegalia wrightii	Wright acacia	Little (1976)
Acacia rigidula	blackbrush acacia	Little (1976)
Acacia roemeriana	Roemer acacia	Little (1976)
Acacia tortuosa	twisted acacia	Little (1976)

The following Acacia species appearing in Little (1976 & 1978) are now often segregated into the genus Vachellia Wight & Arn. (Phytologia 87:160. 2006).

Latin Name	English Name	Mapmaker	0	1	2	Original maps
Acacia choriophylla  = Vachellia choriophylla	cinnecord	Little (1978)
Acacia farnesiana  = Vachellia farnesiana	sweet acacia	Little (1976)
Acacia macracantha  = Vachellia macracantha	long spine acacia	Little (1978)

Acer

Latin Name	English Name	Mapmaker	0	1	2	3	4
Acer negundo	boxelder	Little (1971)
Acer nigrum	black maple	Little (1971)
Acer rubrum	red maple	Little (1971)
Acer saccharinum	silver maple	Little (1971)
Acer saccharum	sugar maple	Little (1971)
Acer barbatum (auct.)  = Acer floridanum	southern sugar maple	Little (1977)
Acer leucoderme	chalk maple	Little (1977)
Acer pensylvanicum	striped maple	Little (1977)
Acer spicatum	mountain maple	Little (1977)
Acer macrophyllum	bigleaf maple	Little (1971)
Acer circinatum	vine maple	Little (1976)
Acer glabrum	Rocky Mountain maple	Little (1976)
Acer grandidentatum	bigtooth maple	Little (1976)

Acoelorrhaphe

These Acoelorrhaphe maps may be misleading because they only show the U.S. population, which is restricted to extreme southern Florida. Other sources inticate that the range of the monospecific Acoelorrhaphe includes parts of Central America.

Latin Name	English Name	Mapmaker	0	1	2	Original
Acoelorrhaphe wrightii	paurotis palm	Little (1978)

Aesculus

Latin Name	English Name	Mapmaker	0	1	2
Aesculus glabra	Ohio buckeye	Little (1971)
Aesculus octandra   = Aesculus flava	yellow buckeye	Little (1971)
Aesculus parviflora	bottlebrush buckeye	Little (1977)
Aesculus pavia	red buckeye	Little (1977)
Aesculus sylvatica	painted buckeye	Little (1977)
Aesculus californica	California buckeye	Little (1976)

Agave

Latin Name	English Name	Mapmaker	0	1	2
Agave utahensis	Utah agave	Benson & Darrow (1981)

Alnus

Latin Name	English Name	Mapmaker	0	1	2
Alnus maritima	seaside alder	Little (1977)
Alnus serrulata	hazel alder	Little (1977)
Alnus incana subspp.	speckled alder, & thinleaf alder	Little (1977)
Alnus rugosa  = A. incana ssp. rugosa	speckled alder	Little (1977)
Alnus tenuifolia  = A. incana ssp. tenuifolia	thinleaf alder	Little (1976)
Alnus oblongifolia	Arizona alder	Little (1976)
Alnus rhombifolia	white alder	Little (1976)
Alnus sinuata  = Alnus viridis ssp. sinuata	Sitka alder	Little (1976)
Alnus rubra	red alder	Little (1971)

Alvaradoa

Latin Name	English Name	Mapmaker	0	1	2
Alvaradoa amorphoides	Mexican alvaradoa	Little (1978)

Amelanchier

Latin Name	English Name	Mapmaker	0	1	2
Amelanchier arborea	downy serviceberry	Little (1977)
Amelanchier interior	inland serviceberry	Little (1977)
Amelanchier sanguinea	roundleaf serviceberry	Little (1977)
Amelanchier alnifolia	western serviceberry	Little (1976)
Amelanchier utahensis	Utah serviceberry	Little (1976)

Amphitecna

Latin Name	English Name	Mapmaker	0	1	2
Amphitecna latifolia	black calabash	Little (1978)

Amyris

Latin Name	English Name	Mapmaker	png0	png1	svg
Amyris balsamifera	balsam torchwood	Little (1978)
Amyris elemifera	sea torchwood, smooth torchwood	Little (1978)

Annona

Latin Name	English Name	Mapmaker	png0	png1	svg
Annona glabra	pond apple	Little (1978)

Aralia

Latin Name	English Name	Mapmaker	png0	png1	svg
Aralia spinosa	devils walkingstick	Little (1977)

Arbutus

Latin Name	English Name	Mapmaker	png0	png1	svg
Arbutus arizonica	Arizona madrone	Little (1976)
Arbutus menziesii	Pacific madrone	Little (1971)
Arbutus texana = Arbutus xalapensis	Texas madrone	Little (1976)

Arctostaphylos

Latin Name	English Name	Mapmaker	png0	png1	svg
Arctostaphylos pringlei	Pringle manzanita	Little (1976)

Ardisia

Latin Name	English Name	Mapmaker	png0	png1	svg
Ardisia escallonioides	marlberry	Little (1978)

Artemisia

Latin Name	English Name	Mapmaker	png0	png1	svg
Artemisia tridentata	big sagebrush	Little (1976)

Asimina

Latin Name	English Name	Mapmaker	png0	png1	svg
Asimina parviflora	smallflower pawpaw	Little (1978)
Asimina triloba	pawpaw	Little (1977)

Avicennia

Latin Name	English Name	Mapmaker	png0	png1	svg	others
Avicennia germinans	black mangrove	Little (1977,78)

Baccharis

Latin Name	English Name	Mapmaker	0	1	2	3
Baccharis halimifolia	eastern baccharis	Little (1977)

Betula

Latin Name	English Name	Mapmaker	png0	png1	png2	svg
Betula alleghaniensis	yellow birch	Little (1971)
Betula lenta	sweet birch	Little (1971)
Betula nana	dwarf birch	Little (1975)
Betula neoalaskana	Alaska 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

Note that the Little (1978) source only includes maps of Florida. These plants may occur naturally in other North American locations. The USDA-NRCS Plants database shows them both as also native to Puerto Rico.

Latin Name	English Name	Mapmaker	0	1	2	3	4
Bourreria ovata = Bourreria succulenta[3]	Bahama strongbark	Little (1978)
Bourreria radula	rough strongbark	Little (1978)	Page 170 not available in copy of Little'78. Atlas of Florida Vascular Plants shows Bourreria radula all along the Keys. USDA-NRCS shows it also in Puerto Rico.

Sideroxylon (Bumelia)

Latin Name	English Name	Mapmaker	0	1	2	3
Bumelia celastrina  = Sideroxylon celastrinum	saffron plum	Little (1976,78)
Bumelia lanuginosa  = Sideroxylon lanuginosum	gum bumelia	Little (1976,77)
Bumelia lycioides  = Sideroxylon lycioides	buckthorn bumelia	Little (1977)
Bumelia tenax  = Sideroxylon tenax	tough bumelia, tough bully, tough buckthorn	Little (1977)

Bursera

Latin Name	English Name	Mapmaker	0	1	2	3
Bursera fagaroides	fragrant bursera	Little (1976)
Bursera microphylla	elephanttree	Little (1976)
Bursera simaruba	gumbo limbo	Little (1978)

Byrsonima

Latin Name	English Name	Mapmaker	0	1	2	3	4
Byrsonima lucida	long key locustberry	Little (1978)

Caesalpinia

Latin Name	English Name	Mapmaker	0	1	2	3	4
Caesalpinia mexicana	Mexican poinciana	Little (1976)

Calyptranthes

Latin Name	English Name	Mapmaker	0	1	2	3	4
Calyptranthes pallens	pale lidflower	Little (1978)
Calyptranthes zuzygium	myrtle of the river	Little (1978)

Canella

Latin Name	English Name	Mapmaker	0	1	2	3
Canella winterana	canella	Little (1978)

Canotia

Latin Name	English Name	Mapmaker	0	1	2	3
Canotia holacantha	canotia, crucifixion thorn	Little (1976)

Capparis

Latin Name	English Name	Mapmaker	0	1	2	3
Capparis cynophallophora	Jamaica caper	Little (1978)
Capparis flexuosa	limber caper	Little (1978)

Carpinus

Latin Name	English Name	Mapmaker	0	1	2	3	1938
Carpinus caroliniana	American hornbeam	Little (1971)

Carya

Latin Name	English Name	Mapmaker	1971	1	2	1938
Carya aquatica	water hickory	Little (1971)
Carya cordiformis	bitternut hickory	Little (1971)
Carya glabra (=) Hicoria glabra	pignut hickory	Little (1971)
Carya illinoensis = Carya illinoinensis	pecan	Little (1971)
Carya laciniosa (=) Hicoria laciniosa	shellbark hickory	Little (1971)
Carya myristicaeformis = Carya myristiciformis	nutmeg hickory	Little (1971)
Carya ovata	shagbark hickory	Little (1971)
Carya tomentosa	mockernut hickory	Little (1971)
Latin Name	English Name	Mapmaker	1977	1	2	1938
Carya floridana	scrub hickory	Little (1977)
Carya pallida	sand hickory	Little (1977)
Carya texana	black hickory	Little (1977)

Castanea

Latin Name	English Name	Mapmaker	1977	1	2	3	4	1938
Castanea dentata	American chestnut	Little (1977)
Castanea ozarkensis	Ozark chinkapin	Little (1977)
Castanea pumila	Allegheny chinkapin	Little (1977) Munns (1938)
Castanea alnifolia = Castanea pumila	Florida chinkapin	Little (1977)
Latin Name	English Name	Mapmaker	1971	1	2	3	4	1938
Castanopsis chrysophylla = Chrysolepis chrysophylla	golden chinkapin	Little (1971)

Catalpa

Latin Name	English Name	Mapmaker	0	1	2	3
Catalpa bignonioides	southern catalpa	Little (1977)
Catalpa speciosa	northern catalpa	Little (1971)

Ceanothus

Latin Name	English Name	Mapmaker	0	1	2	3	4
Ceanothus arboreus	feltleaf ceanothus	Little (1976)
Ceanothus spinosus	spiny ceanothus	Little (1976)
Ceanothus thyrsiflorus	blueblossom	Little (1976)

Celtis

Latin Name	English Name	Mapmaker	0	1	2	3	4	5
Celtis laevigata	sugarberry, southern hackberry	Little (1971)
Celtis occidentalis	common hackberry, northern hackberry	Little (1971)
Celtis tenuifolia	Georgia hackberry	Little (1977)
Celtis lindheimeri	Lindheimer hackberry	Little (1976)
Celtis reticulata	netleaf hackberry	Little (1976)

Cephalanthus

Latin Name	English Name	Mapmaker	0	1	2
Cephalanthus occidentalis	common buttonbush	Little (1976,77)

Cercis

Latin Name	English Name	Mapmaker	0	1	2	3	4
Cercis canadensis	eastern redbud	Little (1976,77)
Cercis occidentalis	California redbud, western redbud	Little (1976)

Cercocarpus

Latin Name	English Name	Mapmaker	0	1	2	3
Cercocarpus betuloides	birchleaf cercocarpus	Little (1976)
Cercocarpus breviflorus	hairy cercocarpus	Little (1976)
Cercocarpus ledifolius	curlleaf cercocarpus	Little (1976)
Cercocarpus traskiae	Catalina cercocarpus	Little (1976)

Cereus

Latin Name	English Name	Mapmaker	0	1	2	3	4
Cereus giganteus = Carnegiea gigantea	saguaro	Little (1976)
Cereus robinii	key tree cactus	Little (1978)

Chamaecyparis

Latin Name	English Name	Mapmaker	0	1	2	3
Chamaecyparis lawsoniana	Port Orford cedar, Lawson's cypress	Little (1971)
Chamaecyparis nootkatensis = Cupressus nootkatensis	Alaska cedar, Nootka cypress	Little (1971)
Chamaecyparis thyoides	Atlantic white cedar	Little (1971)

Chilopsis

Latin Name	English Name	Mapmaker	0	1	2	3
Chilopsis linearis	desert willow	Little (1976)

Chionanthus

Latin Name	English Name	Mapmaker	0	1	2	3
Chionanthus virginicus	fringetree	Little (1977)

Chrysobalanus

Latin Name	English Name	Mapmaker	0	3	2	3
Chrysobalanus icaco	cocoplum	Little (1978) Map 180

Chrysophyllum

Latin Name	English Name	Mapmaker	0	1	2	3
Chrysophyllum oliviforme	satinleaf	Little (1978)

Citharexylum

Latin Name	English Name	Mapmaker	0	1	2	3
Citharexylum berlandieri	Berlandier fiddlewood	Little (1976)
Citharexylum fruticosum = Citharexylum spinosum	Florida fiddlewood	Little (1978)

Cladrastis

Latin Name	English Name	Mapmaker	0	1	2	3	4
Cladrastis kentukea	yellowwood	Little (1977)

Clethra

Latin Name	English Name	Mapmaker	0	1	2	3	4	5
Clethra acuminata	cinnamon clethra	Little (1977)

Cliftonia

Latin Name	English Name	Mapmaker	0	1	2	3	4	5	6
Cliftonia monophylla	buckwheat tree	Little (1977)

Clusia

Latin Name	English Name	Mapmaker	0	1	2
Clusia rosea	Florida clusia	Little (1978)

Coccothrinax

Latin Name	English Name	Mapmaker	0	1	2
Coccothrinax argentata	Florida silverpalm	Little (1978)

Coccoloba

Latin Name	English Name	Mapmaker	0	1	2
Coccoloba diversifolia	pigeon plum	Little (1978)
Coccoloba uvifera	seagrape	Little (1978)

Colubrina

Latin Name	English Name	Mapmaker	0	1	2
Colubrina arborescens	coffee colubrina	Little (1978)
Colubrina cubensis	Cuba colubrina	Little (1978)
Colubrina elliptica	soldierwood	Little (1978)

Condalia

Latin Name	English Name	Mapmaker	0	1	2	3	4	5	6
Condalia globosa	bitter condalia	Little (1976)
Condalia hookeri	bluewood	Little (1976)

Conocarpus

Latin Name	English Name	Mapmaker	0	1	2
Conocarpus erectus	button mangrove	Little (1978)

Cordia

Latin Name	English Name	Mapmaker	0	1	2
Cordia boissieri	anacahuita	Little (1976)
Cordia sebestena	Geiger tree	Little (1978)

Cornus

Latin Name	English Name	Mapmaker	0	1
Cornus florida	flowering dogwood	Little (1971)
Cornus alternifolia	alternate leaf dogwood	Little (1977)
Cornus drummondii	roughleaf dogwood	Little (1977)
Cornus foemina ≈ Cornus stricta	stiff dogwood, swamp dogwood	Little (1977)
Cornus racemosa	gray dogwood	Little (1977)
Cornus rugosa	roundleaf dogwood	Little (1977)
Cornus sericea sericea ≈ Cornus stolonifera	red osier dogwood	Little (1977)
Cornus sericea occidentalis ≈ Cornus occidentalis	western dogwood	Little (1976)
Cornus glabrata	brown dogwood	Little (1976)
Cornus nuttallii	Pacific dogwood	Little (1976)
Cornus sessilis	blackfruit dogwood	Little (1976)

Corylus

Latin Name	English Name	Mapmaker	0	1	2	3
Corylus cornuta	beaked hazel	Little (1977)

Cotinus

Latin Name	English Name	Mapmaker	0	1	2	3	4	5
Cotinus obovatus	American smoketree	Little (1977)

Cowania

Latin Name	English Name	Mapmaker	0	1	2
Cowania mexicana	cliffrose	Little (1976)

Eastern Crataegus

Latin Name	English Name	Mapmaker	1981
Crataegus aestivalis	May hawthorn	Little (1981)
Crataegus berberifolia	barberry hawthorn	Little (1981)
Crataegus brachyacantha	blueberry hawthorn	Little (1981)
Crataegus brainerdii	Brainerd hawthorn	Little (1981)
Crataegus calpodendron	pear hawthorn	Little (1981)
Crataegus coccinea	scarlet hawthorn	Little (1981)
Crataegus coccinioides	Kansas hawthorn	Little (1981)
Crataegus dilatata = Crataegus coccinioides	broadleaf hawthorn	Little (1981)
Crataegus crus-galli	cockspur hawthorn	Little (1981)
Crataegus flabellata	fanleaf hawthorn	Little (1981)

Western & transcontinental Crataegus

Latin Name	English Name	Mapmaker	0	1	2	3	1976	1981
Crataegus chrysocarpa  var. chrysocarpa	fireberry hawthorn, red haw	Little (1976)
C. columbiana (auct.) = C. 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 hawthorn	Little (1976)

Crossopetalum

Latin Name	English Name	Mapmaker	0	1	2
Crossopetalum rhacoma	Florida crossopetalum	Little (1978)

Cupania

Latin Name	English Name	Mapmaker	0	1	2
Cupania glabra	Florida cupania	Little (1978)

Cupressus

Latin Name	English Name	Mapmaker	0	1	2	3	4
Cupressus arizonica s.l.	Arizona cypress	Little (1971)
Cupressus arizonica s.s. ≈ C. arizonica arizonica	Arizona cypress	Little (1971)
Cupressus glabra ≈ C. arizonica glabra	Arizona smooth-bark cypress	Little (1971)
Cupressus montana ≈ C. arizonica montana ≈ Callitropsis montana	San Pedro Martír cypress	Little (1971)
Cupressus nevadensis ≈ C. arizonica nevadensis	Piute cypress	Little (1971) Griffin (1972)
Cupressus stephensonii ≈ C. arizonica stephensonii ≈ Callitropsis stephensonii	Cuyamaca cypress	Little (1971) Griffin (1972)
Cupressus bakeri	Baker cypress, Modoc cypress	Little (1971)
Cupressus goveniana s.l.	Gowen cypress, Mendocino Cypress & Santa Cruz Cypress	Little (1971)
Cupressus goveniana s.s. ≈ C. goveniana goveniana	Gowen cypress	Griffin (1972)
Cupressus pygmaea ≈ C. goveniana pygmaea	Mendocino Cypress	Griffin (1972)
Cupressus abramsiana ≈ C. goveniana abramsiana	Santa Cruz Cypress	Griffin (1972)
Cupressus guadalupensis ≈ Callitropsis guadalupensis	Guadalupe cypress, Tecate cypress	Little (1971)
Cupressus forbesii ≈ C. guadalupensis forbesii ≈ Callitropsis forbesii	Forbes' cypress Tecate cypress	Griffin (1972)
Cupressus macnabiana	MacNab cypress, Shasta cypress	Little (1971)
Cupressus macrocarpa	Monterey cypress	Little (1971)
Cupressus sargentii	Sargent cypress	Little (1971)
Cupressus nootkatensis	Nootka cypress	Little (1971)

Cyrilla

Latin Name	English Name	Mapmaker	0	1	2
Cyrilla racemiflora	swamp cyrilla	Little (1977)

Dalea

Latin Name	English Name	Mapmaker	0	1	2
Dalea spinosa	smokethorn	Little (1976)

Diospyros

Latin Name	English Name	Mapmaker	0	1	2
Diospyros texana	Texas persimmon	Little (1976)
Diospyros virginiana	common persimmon	Little (1971)

Dipholis

Latin Name	English Name	Mapmaker	0	1	2
Dipholis salicifolia	willow bustic	Little (1978)

Dodonaea

Latin Name	English Name	Mapmaker	0	1	2
Dodonaea viscosa	hopbush	Little (1976,78)

Drypetes

Latin Name	English Name	Mapmaker	0	1	2
Drypetes diversifolia	milkbark	Little (1978)
Drypetes lateriflora	Guiana plum	Little (1978)

Ehretia

Latin Name	English Name	Mapmaker	0	1	2
Ehretia anacua	anaqua	Little (1976)

Elliottia

Latin Name	English Name	Mapmaker	0	1	2
Elliottia racemosa	elliottia	Little (1977)

Erythrina

Latin Name	English Name	Mapmaker	0	1	2
Erythrina flabelliformis	southwestern coralbean	Little (1976)
Erythrina herbacea	eastern coralbean	Little (1977)

Esenbeckia

Latin Name	English Name	Mapmaker	0	1	2
Esenbeckia berlandieri	Berlandier esenbeckia	Little (1976)

Eugenia

Latin Name	English Name	Mapmaker	0	1	2
Eugenia axillaris	white stopper	Little (1978)
Eugenia confusa	redberry stopper	Little (1978)
Eugenia foetida	boxleaf stopper	Little (1978)
Eugenia rhombea	red stopper	Little (1978)

Euonymus

Latin Name	English Name	Mapmaker	0	1	2
Euonymus atropurpureus	eastern wahoo	Little (1977)
Euonymus occidentalis	western wahoo	Little (1976)

Exostema

Latin Name	English Name	Mapmaker	0	1	2
Exostema caribaeum	princewood	Little (1978)

Exothea

Latin Name	English Name	Mapmaker	0	1	2
Exothea paniculata	inkwood	Little (1978)

Eysenhardtia

Latin Name	English Name	Mapmaker	0	1	2
Eysenhardtia polystachya	kidneywood	Little (1976)
Eysenhardtia texana	Texas kidneywood	Little (1976)

Fagus

Latin Name	English Name	Mapmaker	0	1	2	3	4
Fagus grandifolia	American beech	Little (1971)
Fagus grandifolia  subsp. mexicana	Mexican beech	Little (1971)

Ficus

Latin Name	English Name	Mapmaker	0	1	2
Ficus aurea	Florida strangler fig	Little (1978)
Ficus citrifolia	shortleaf fig	Little (1978)

Forestiera

Latin Name	English Name	Mapmaker	0	1	2
Forestiera acuminata	swamp privet	Little (1977)
Forestiera angustifolia	Texas forestiera	Little (1976)
Forestiera phillyreoides	desert olive forestiera	Little (1976)
Forestiera segregata	Florida privet	Little (1977)

Franklinia

Latin Name	English Name	Mapmaker	0	1	2
Franklinia alatamaha	franklinia	Little (1977)

Fraxinus

Latin Name	English Name	Mapmaker	0	1	2	3	4	5
Fraxinus americana	white ash	Little (1971)
Fraxinus pennsylvanica	green ash	Little (1971)
Fraxinus latifolia	Oregon ash	Little (1971)
Fraxinus nigra	black ash	Little (1971)
Fraxinus quadrangulata	blue ash	Little (1971) Munns (1938)
Fraxinus caroliniana	Carolina ash	Little (1977)
Fraxinus profunda	pumpkin ash	Little (1977)
Fraxinus anomala	singleleaf ash	Little (1976)
Fraxinus berlandieriana	Berlandier ash, Mexican ash	Little (1976)
Fraxinus cuspidata	fragrant ash	Little (1976)
Fraxinus dipetala	two petal ash	Little (1976)
Fraxinus gooddingii	Goodding ash	Little (1976)
Fraxinus greggii	Gregg ash	Little (1976)
Fraxinus papillosa	Chihuahua ash	Little (1976)
Fraxinus texensis	Texas ash	Little (1976)
Fraxinus velutina	velvet ash	Little (1976)

Fremontodendron

Latin Name	English Name	Mapmaker	0	1	2
Fremontodendron californicum	California fremontia	Little (1976)
Fremontodendron mexicanum	Mexican fremontia	Little (1976)

Garrya

Latin Name	English Name	Mapmaker	0	1	2
Garrya elliptica	wavyleaf silktassel	Little (1976)

Genipa

Latin Name	English Name	Mapmaker	0	1	2
Genipa clusiifolia	seven year apple	Little (1978)

Gleditsia

Latin Name	English Name	Mapmaker	1977	1971	1938
Gleditsia aquatica	waterlocust	Little (1977)
Gleditsia triacanthos	honeylocust	Little (1971)

Gordonia

Latin Name	English Name	Mapmaker	0	1	2
Gordonia lasianthus	loblolly bay	Little (1977)

Guaiacum

Latin Name	English Name	Mapmaker	0	1	2
Guaiacum angustifolium	Texas lignumvitae	Little (1976)
Guaiacum sanctum	roughbark lignumvitae	Little (1978)

Guapira

Latin Name	English Name	Mapmaker	0	1	2
Guapira discolor	blolly	Little (1978)

Guettarda

Latin Name	English Name	Mapmaker	0	1	2
Guettarda elliptica	elliptic leaf velvetseed	Little (1978)
Guettarda scabra	roughleaf velvetseed	Little (1978)

Gyminda

Latin Name	English Name	Mapmaker	0	1	2
Gyminda latifolia	falsebox	Little (1978)

Gymnocladus

Latin Name	English Name	Mapmaker	0	1	2
Gymnocladus dioicus	Kentucky coffeetree	Little (1977)

Gymnanthes

Latin Name	English Name	Mapmaker	0	1	2
Gymnanthes lucida	oysterwood	Little (1978)

Halesia

Latin Name	English Name	Mapmaker	0	1	2
Halesia carolina	Carolina silverbell	Little (1977)
Halesia diptera	two wing silverbell	Little (1977)
Halesia parviflora	little silverbell	Little (1977)

Hamamelis

Latin Name	English Name	Mapmaker	1977	1	1938
Hamamelis virginiana	witch hazel	Little (1977)

Hamelia

Latin Name	English Name	Mapmaker	0	1	2
Hamelia patens	scarletbush	Little (1978)

Helietta

Latin Name	English Name	Mapmaker	0	1	2
Helietta parvifolia	barreta	Little (1976)

Hippomane

Latin Name	English Name	Mapmaker	0	1	2
Hippomane mancinella	manchineel	Little (1978)

Holacantha

Latin Name	English Name	Mapmaker	0	1	2
Holacantha emoryi	holacantha	Little (1976)

Hypelate

Latin Name	English Name	Mapmaker	0	1	2
Hypelate trifoliata	hypelate	Little (1978)

Ilex

Latin Name	English Name	Mapmaker	0	1	2	3	4
Ilex opaca	American holly	Little (1971)
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 laevigata	smooth winterberry	Little (1977)
Ilex montana	mountain winterberry	Little (1977)
Ilex myrtifolia	myrtle dahoon	Little (1977)
Ilex verticillata	common winterberry	Little (1977)
Ilex vomitoria	yaupon	Little (1977)
Ilex krugiana	tawnyberry holly	Little (1978)
Ilex longipes	Georgia holly	Little (1978)

Illicium

Latin Name	English Name	Mapmaker	0	1	2
Illicium floridanum	Florida anise tree	Little (1977)
Illicium parviflorum	yellow anise tree	Little (1977)

Jacquinia

Latin Name	English Name	Mapmaker	0	1	2
Jacquinia keyensis	joewood	Little (1978)

Juglans

Latin Name	English Name	Mapmaker	0	1	2
Juglans californica	California walnut	Little (1976)
Juglans cinerea	butternut	Little (1971)
Juglans hindsii	Hinds walnut	Little (1976)
Juglans major	Arizona walnut	Little (1976)
Juglans microcarpa	little walnut	Little (1976)
Juglans nigra	black walnut	Little (1971)

Juniperus

Latin Name	English Name	Mapmaker	0	1	2	3	4
Juniperus communis	common juniper	Little (1971)
Juniperus horizontalis	creeping juniper	Little (1971)
Juniperus virginiana	redcedar	Little (1971)
Juniperus virginiana  var. virginiana	eastern redcedar	Little (1971)
Juniperus silicicola = Juniperus virginiana  var. silicicola	southern redcedar	Little (1971)
Juniperus ashei	Ashe juniper	Little (1971)
Juniperus californica	California juniper	Little (1971)
Juniperus deppeana	alligator juniper	Little (1971)
Juniperus flaccida	drooping juniper	Little (1971)
Juniperus monosperma	one seed juniper	Little (1971)
Juniperus occidentalis	western juniper	Little (1971)
Juniperus osteosperma	Utah juniper	Little (1971)
Juniperus pinchotii  ≈ Juniperus erythrocarpa p.p.	Pinchot juniper	Little (1971) Little (1981)
Juniperus arizonica  ≈ Juniperus erythrocarpa p.p.	redberry juniper, Arizona juniper	Little (1981)
Juniperus scopulorum	Rocky Mountain juniper	Little (1971)
Juniperus maritima	seaside juniper, Puget Sound juniper	Little (1971)

Kalmia

Latin Name	English Name	Mapmaker	0	1	2
Kalmia latifolia	mountain laurel	Little (1977)

Koeberlinia

Latin Name	English Name	Mapmaker	0	1	2
Koeberlinia spinosa	allthorn	Little (1976)

Krugiodendron

Latin Name	English Name	Mapmaker	0	1	2
Krugiodendron ferreum	leadwood	Little (1978)

Laguncularia

Latin Name	English Name	Mapmaker	0	1	2
Laguncularia racemosa	white mangrove	Little (1978)

Larrea

Latin Name	English Name	Mapmaker	0	1	2
Larrea divaricata	creosote bush	Yang (1970)

Leitneria

Latin Name	English Name	Mapmaker	0	1	2
Leitneria floridana	corkwood	Little (1977)

Leucaena

Latin Name	English Name	Mapmaker	0	1	2
Leucaena pulverulenta	great leadtree	Little (1976)
Leucaena retusa	littleleaf leadtree	Little (1976)

Libocedrus

Latin Name	English Name	Mapmaker	0	1	2
Libocedrus decurrens	incense cedar	Little (1971)

Licaria

Latin Name	English Name	Mapmaker	0	1	2
Licaria triandra	Florida licaria	Little (1978)

Liquidambar

Latin Name	English Name	Mapmaker	0	1	2	3	4	5
Liquidambar styraciflua	sweetgum	Little (1971)

Liriodendron

Latin Name	English Name	Mapmaker	0	1	2	3	4	5
Liriodendron tulipifera	Tulip-tree	Little (1971)

Lithocarpus

Latin Name	English Name	Mapmaker	0	1	2
Lithocarpus densiflorus	tanoak	Little (1971)

Lyonia

Latin Name	English Name	Mapmaker	0	1	2
Lyonia ferruginea	tree lyonia	Little (1977)

Lyonothamnus

Latin Name	English Name	Mapmaker	0	1	2
Lyonothamnus floribundus	Lyontree	Little (1976)

Lysiloma

Latin Name	English Name	Mapmaker	0	1	2
Lysiloma latisiliquum	Bahama lysiloma	Little (1978)
Lysiloma microphylla	littleleaf lysiloma	Little (1976)

Maclura

Latin Name	English Name	Mapmaker	0	1	2
Maclura pomifera	Osage orange	Little (1971)

Magnolia

Latin Name	English Name	Mapmaker	0	1	2	3	4	5
Magnolia grandiflora	southern magnolia	Little (1971)
Magnolia virginiana	sweetbay	Little (1971)
Magnolia acuminata	cucumbertree	Little (1971)
Magnolia tripetala	umbrella magnolia	Little (1977)
Magnolia ashei	Ashe magnolia	Little (1977)
Magnolia fraseri	Fraser magnolia	Little (1977)
Magnolia macrophylla	bigleaf magnolia	Little (1977)
Magnolia pyramidata	pyramid magnolia	Little (1977)

Malus

Latin Name	English Name	Mapmaker	0	1	2
Malus angustifolia	southern crab apple	Little (1977)
Malus coronaria	sweet crab apple	Little (1977)
Malus diversifolia	Oregon crab apple	Little (1976)
Malus ioensis	prairie crab apple	Little (1977)

Manilkara

Latin Name	English Name	Mapmaker	0	1	2
Manilkara bahamensis	wild dilly	Little (1978)

Mastichodendron

Latin Name	English Name	Mapmaker	0	1	2
Mastichodendron foetidissimum	false mastic	Little (1978)

Maytenus

Latin Name	English Name	Mapmaker	0	1	2
Maytenus phyllanthoides	Florida mayten	Little (1978)

Metopium

Latin Name	English Name	Mapmaker	0	1	2
Metopium toxiferum	Florida poisontree	Little (1978)

Morus

Latin Name	English Name	Mapmaker	0	1	2
Morus microphylla	Texas mulberry	Little (1976)
Morus rubra	red mulberry	Little (1971)

Myrcianthes

Latin Name	English Name	Mapmaker	0	1	2
Myrcianthes fragrans	twinberry stopper	Little (1978)

Myrica

Latin Name	English Name	Mapmaker	0	1	2
Myrica californica	Pacific bayberry	Little (1976)
Myrica cerifera	southern bayberry	Little (1977)
Myrica heterophylla	evergreen bayberry	Little (1977)
Myrica inodora	odorless bayberry	Little (1977)
Myrica pensylvanica	northern bayberry	Little (1977)

Nectandra

Latin Name	English Name	Mapmaker	0	1	2
Nectandra coriacea	Florida nectandra	Little (1978)

Nemopanthus

Latin Name	English Name	Mapmaker	0	1	2
Nemopanthus collinus	mountain holly	Little (1977)

Nolina

Latin Name	English Name	Mapmaker	0	1	2
Nolina bigelovii	Bigelow nolina	Little (1976)

Nyssa

Latin Name	English Name	Mapmaker	0	1	2
Nyssa aquatica	water tupelo	Little (1971)
Nyssa ogeche	Ogeechee tupelo	Little (1971)
Nyssa sylvatica	black tupelo, blackgum	Little (1971)

Olneya

Latin Name	English Name	Mapmaker	0	1	2
Olneya tesota	tesota	Little (1976)

Opuntia

Latin Name	English Name	Mapmaker	0	1	2
Opuntia fulgida	jumping cholla	Little (1976)

Osmanthus

Latin Name	English Name	Mapmaker	0	1	2
Osmanthus americanus	devilwood	Little (1977)

Ostrya

Latin Name	English Name	Mapmaker	0	1	1938
Ostrya chisosensis	Chisos hophornbean	Little (1976)
Ostrya knowltonii	Knowlton hophornbeam	Little (1976)
Ostrya virginiana	eastern hophornbeam	Little (1971)

Oxydendrum

Latin Name	English Name	Mapmaker	0	1	2
Oxydendrum arboreum	sourwood	Little (1977)

Parkinsonia

Latin Name	English Name	Mapmaker	0	1	2	3
Parkinsonia aculeata	Jerusalem thorn, Mexican paloverde	Little (1976) Map 107
Cercidium floridum = Parkinsonia florida	blue paloverde	Little (1976) Map 35
Cercidium macrum = Parkinsonia texana   var. macra	border paloverde	Little (1976) Map 36
Cercidium microphyllum = Parkinsonia microphylla	yellow paloverde	Little (1976) Map 37

Persea

Latin Name	English Name	Mapmaker	0	1	2
Persea borbonia	redbay	Little (1977)

Photinia

Latin Name	English Name	Mapmaker	0	1	2
Photinia arbutifolia	Christmas berry	Little (1976)

Picramnia

Latin Name	English Name	Mapmaker	0	1	2
Picramnia pentandra	bitterbush	Little (1978)

Pinckneya

Latin Name	English Name	Mapmaker	0	1	2
Pinckneya pubens	pinckneya	Little (1977)

Piscidia

Latin Name	English Name	Mapmaker	0	1	2
Piscidia piscipula	Florida fishpoison tree	Little (1978)

Pisonia

Latin Name	English Name	Mapmaker	0	1	2
Pisonia rotundata	pisonia	Little (1978)

Pistacia

Latin Name	English Name	Mapmaker	0	1	2
Pistacia texana	Texas pistache	Little (1976)

Pithecellobium

Latin Name	English Name	Mapmaker	0	1	2
Pithecellobium flexicaule	ebony blackbead	Little (1976)
Pithecellobium guadalupense	Guadeloupe blackbead	Little (1978)
Pithecellobium pallens	huajillo	Little (1976)
Pithecellobium unguis-cati	catclaw blackbead	Little (1978)

Planera

Latin Name	English Name	Mapmaker	0	1	2
Planera aquatica	planertree	Little (1977)

Platanus

Latin Name	English Name	Mapmaker	0	1	2
Platanus occidentalis	American sycamore	Little (1971)
Platanus racemosa	California sycamore	Little (1976)
Platanus wrightii	Arizona sycamore	Little (1976)

Populus

Latin Name	English Name	Mapmaker	0	1	2	3	4
Populus angustifolia	narrowleaf cottonwood	Little (1976)
Populus fremontii	Fremont cottonwood	Little (1971)
Populus arizonica = P. fremontii fremontii	Arizona cottonwood	Little (1976)	The populations on the USGS Populus arizonica map have been added to the Populus fremontii map above.
Populus × hinckleyana [angustifolia × fremontii]	Hinckley cottonwood	Little (1976)
Populus balsamifera	balsam poplar	Little (1971)
Populus deltoides	eastern cottonwood	Little (1971)
Populus grandidentata	bigtooth aspen	Little (1971) Munns (1938)
Populus heterophylla	swamp cottonwood	Little (1971)
Populus tremuloides	quaking aspen	Little (1971)
Populus trichocarpa	black cottonwood	Little (1971) Munns (1938)

Prosopis

Latin Name	English Name	Mapmaker	0	1	2
Prosopis juliflora	mesquite	Little (1976)
Prosopis pubescens	screwbean mesquite	Little (1976)

Prunus

Latin Name	English Name	Mapmaker	0	1	2	3
Prunus serotina	black cherry	Little (1971)
Prunus americana	American plum	Little (1976,77)
Prunus angustifolia	Chickasaw plum	Little (1976,77)
Prunus pensylvanica	pin cherry	Little (1976,77)
Prunus virginiana	common chokecherry	Little (1976,77)
Prunus alleghaniensis	Allegheny plum	Little (1977)
Prunus caroliniana	Carolina laurelcherry	Little (1977)
Prunus hortulana	hortulan plum	Little (1977)
Prunus mexicana	Mexican plum	Little (1977)
Prunus munsoniana  = Prunus rivularis	wildgoose plum, creek plum	Little (1977)
Prunus nigra	Canada plum	Little (1977)
Prunus umbellata	flatwoods plum	Little (1977)
Prunus myrtifolia	West Indies cherry	Little (1978)
Prunus emarginata	bitter cherry	Little (1976)
Prunus fremontii	desert apricot	Little (1976)
Prunus ilicifolia  var. ilicifolia  var. occidentalis	hollyleaf cherry, Catalina cherry	Little (1976)
P. ilicifolia var. ilicifolia	hollyleaf cherry	Little (1976)
P. ilicifolia var. occidentalis  ≈ Prunus lyonii	Catalina cherry	Little (1976)
Prunus subcordata	Klamath plum	Little (1976)

Pseudophoenix

Latin Name	English Name	Mapmaker	0	1	2
Pseudophoenix sargentii	buccaneer palm	Little (1978)

Psidium

Latin Name	English Name	Mapmaker	0	1	2
Psidium longipes	long stalk stopper	Little (1978)

Ptelea

Latin Name	English Name	Mapmaker	1976	1	2
Ptelea crenulata	California hoptree	Little (1976)
Ptelea trifoliata	common hoptree	Little (1976)

Quercus

Eastern Quercus

Vol. 1 (1971)

Latin Name	English Name	Mapmaker	1971	1	2	1938
Quercus alba	white oak	Little (1971)
Quercus bicolor	swamp white oak	Little (1971)
Quercus coccinea	scarlet oak	Little (1971)
Quercus ellipsoidalis	northern pin oak	Little (1971) Munns (1938)
Quercus falcata	southern red oak	Little (1971)
Quercus laurifolia	laurel oak	Little (1971)
Quercus lyrata	overcup oak	Little (1971)
Quercus macrocarpa	bur oak	Little (1971)
Quercus marilandica	blackjack oak	Little (1971)
Quercus michauxii	swamp chestnut oak	Little (1971)
Quercus muehlenbergii	chinkapin oak	Little (1971) Munns (1938)
Quercus nigra	water oak	Little (1971)
Quercus nuttallii  = Quercus texana	Nuttall oak	Little (1971)
Quercus palustris	pin oak	Little (1971) Munns (1938)
Quercus phellos	willow oak	Little (1971) Munns (1938)
Quercus × heterophylla	Bartram oak	Little (1971) Munns (1938)
Quercus prinus  = Quercus montana	chestnut oak	Little (1971)
Quercus rubra	northern red oak	Little (1971)
Quercus shumardii	Shumard oak	Little (1971)
Quercus stellata	post oak	Little (1971)
Quercus velutina	black oak	Little (1971)
Quercus virginiana	live oak	Little (1971)

Vol. 4 (1977)

Latin Name	English Name	Mapmaker	0	1	2
Quercus arkansana	Arkansas oak	Little (1977)
Quercus chapmanii	Chapman oak	Little (1977)
Quercus durandii	Durand oak	Little (1977)
Quercus georgiana	Georgia oak	Little (1977)
Quercus ilicifolia	bear oak	Little (1977)
Quercus imbricaria	shingle oak	Little (1977)
Quercus incana	bluejack oak	Little (1977)
Quercus laevis	turkey oak	Little (1977)
Quercus myrtifolia	myrtle oak	Little (1977)
Quercus oglethorpensis	Oglethorpe oak	Little (1977)

Western Quercus

Vol. 1 (1971)

Latin Name	English Name	Mapmaker	1971	1	1938
Quercus agrifolia	California live oak	Little (1971)
Quercus chrysolepis	canyon live oak	Little (1971)
Quercus douglasii	blue oak	Little (1971)
Quercus emoryi	Emory oak	Little (1971)
Quercus gambelii	Gambel oak	Little (1971)
Quercus garryana	Oregon white oak	Little (1971) Munns (1938)
Quercus kelloggii	California black oak	Little (1971) Munns (1938)
Quercus lobata	California white oak	Little (1971)

Vol. 3 (1976)

Latin Name	English Name	Mapmaker	0	1	2
Quercus ajoensis	Ajo oak	Little (1976)
Quercus arizonica	Arizona white oak	Little (1976)
Quercus dunnii  = Quercus palmeri	Dunn oak	Little (1976)
Quercus engelmannii	Engelmann oak	Little (1976)
Quercus glaucoides (auct?)   = Quercus laceyi	Lacey oak	Little (1976)
Quercus graciliformis	Chisos oak	Little (1976)
Quercus gravesii incl.  Q. tardifolia (Muller)	Graves oak, lateleaf oak	Little (1976)
Quercus grisea	gray oak	Little (1976)
Quercus havardii	Havard oak	Little (1976)
Quercus hypoleucoides	silverleaf oak	Little (1976)
Quercus macdonaldii	McDonald oak	Little (1976)
Quercus mohriana	Mohrs oak	Little (1976)
Quercus oblongifolia	Mexican blue oak	Little (1976)
Quercus pungens	sandpaper oak	Little (1976)
Quercus rugosa	netleaf oak	Little (1976)
Quercus tomentella	island live oak	Little (1976)
Quercus toumeyi	Toumey oak	Little (1976)
Quercus turbinella	shrub live oak	Little (1976)
Quercus wislizeni	interior live oak	Little (1976)

Rapanea

Latin Name	English Name	Mapmaker	0	1	2
Rapanea punctata	Florida rapanea	Little (1978)

Reynosia

Latin Name	English Name	Mapmaker	0	1	2
Reynosia septentrionalis	darling plum	Little (1978)

Rhamnus

Latin Name	English Name	Mapmaker	0	1	2
Rhamnus betulaefolia	birchleaf buckthorn	Little (1976)
Rhamnus californica	California buckthorn	Little (1976)
Rhamnus caroliniana	Carolina buckthorn	Little (1977)
Rhamnus crocea	hollyleaf buckthorn	Little (1976)
Rhamnus purshiana	cascara buckthorn	Little (1971)

Rhizophora

Latin Name	English Name	Mapmaker	0	1	2
Rhizophora mangle	mangrove	Little (1971,78)

Rhododendron

Latin Name	English Name	Mapmaker	0	1	2
Rhododendron catawbiense	Catawba rhododendron	Little (1977)
Rhododendron macrophyllum	Pacific rhododendron	Little (1976)
Rhododendron maximum	rosebay rhododendron	Little (1977)

Rhus

Latin Name	English Name	Mapmaker	0	1	2	3	4/5
Rhus glabra	smooth sumac	Little (1976,77)
Rhus typhina	staghorn sumac	Little (1977)
Rhus copallinum  ≈ Rhus copallina	shining sumac	Little (1977)
Rhus copallinum var. lanceolata  ≈ Rhus lanceolata	prairie sumac, flameleaf sumac	Little (1976)
Rhus virens var. choriophylla  ≈ Rhus choriophylla	Mearns sumac	Little (1976)
Rhus integrifolia	lemonade sumac	Little (1976)
Rhus kearneyi	Kearney sumac	Little (1976)
Rhus microphylla	littleleaf sumac	Little (1976)
Rhus ovata	sugar sumac	Little (1976)
Malosma laurina  ≈ Rhus laurina	laurel sumac	Little (1976)

Robinia

Latin Name	English Name	Mapmaker	0	1	2
Robinia pseudoacacia	black locust	Little (1971)
Robinia hispida var. kelseyi ≈ Robinia kelseyi	Kelsey locust	Little (1977)
Robinia viscosa	clammy locust	Little (1977)
Robinia neomexicana	New Mexican locust	Little (1976)

Roystonea

Latin Name	English Name	Mapmaker	0	1	2
Roystonea elata	Florida royalpalm	Little (1978)

Sabal

Latin Name	English Name	Mapmaker	0	1	2
Sabal mexicana	Mexican palmetto	Little (1976)
Sabal minor	dwarf palmetto	Little (1977)
Sabal palmetto	cabbage palmetto	Little (1971)

Salix

Salix subg. Salix

Latin Name	English Name	Mapmaker	0	1	2	3	1938
Salix amygdaloides	peachleaf willow	Little (1971)
Salix nigra	black willow	Little (1971,76)
Salix caroliniana	Coastal Plain willow	Little (1977)
Salix floridana	Florida willow	Little (1977)
Salix lucida & lasiandra	shining willow, Pacific willow	Little (1977) Little (1976)
Salix lucida ssp. lucida	shining willow	Little (1977)
Salix lucida ssp. lasiandra	Pacific willow	Little (1976)
Salix bonplandiana	Bonpland willow	Little (1976)
Salix laevigata	red willow	Little (1976)

Salix subg. Vetrix

Latin Name	English Name	Mapmaker	0	1	2	3
Salix bebbiana	Bebb willow	Little (1976,77)
Salix discolor	pussy willow	Little (1976,77)
Salix petiolaris	meadow willow	Little (1976,77)
Salix pellita	satiny willow	Little (1977)
Salix pyrifolia	balsam willow	Little (1977)
Salix sericea	silky willow	Little (1977)
Salix alaxensis	feltleaf willow	Little (1976)
Salix arbusculoides	peachleaf willow	Little (1976)
Salix geyeriana	Geyer willow	Little (1976)
Salix hookeriana	Hooker willow	Little (1976)
Salix lasiolepis	arroyo willow	Little (1976)
Salix prolixa ≈ Salix mackenzieana	Mackenzie willow	Little (1976)
Salix scouleriana	Scouler willow	Little (1976)
Salix sitchensis	Sitka willow	Little (1976)
Salix tracyi	Tracy willow	Little (1976)

Salix subg. Longifoliae

Latin Name	English Name	Mapmaker	0	1	2	3
Salix exigua	coyote willow	Little (1976,77)
Salix exigua hindsiana ≈ Salix hindsiana	Hinds willow	Little (1976)
Salix exigua  var. exigua &  var. hindsiana	coyote willow	Little (1976)
Salix interior ≈ Salix exigua var. interior	sandbar willow	Little (1976)
Salix interior & Salix exigua	sandbar willow & coyote willow	Little (1976)
Salix columbiana ≈ S. fluviatilis ≈ S. exigua var. columbiana	river willow, Columbia river willow	Little (1976)
Salix sessilifolia ≈ S. exigua var. sessilifolia	northwest sandbar willow	Little (1976)
Salix taxifolia	yewleaf willow	Little (1976)

Sambucus

Latin Name	English Name	Mapmaker	0	1	2	3	Original
Sambucus nigra  subsp. canadensis  subsp. cerulea	Black elder	Little (1976) Little (1977)
Sambucus nigra canadensis = Sambucus canadensis	American elder	Little (1977)
Sambucus nigra canadensis = Sambucus mexicana	Mexican elder	Little (1976)
Sambucus nigra cerulea = Sambucus cerulea ≈ Sambucus glauca	blueberry elder	Little (1976)
Sambucus nigra cerulea ≈ Sambucus velutina	velvet elder	Little (1976)
Sambucus racemosa  var. racemosa  var. melanocarpa	Red elder	Little (1976)
Sambucus racemosa racemosa ≈ Sambucus callicarpa	Pacific red elder	Little (1976)
Sambucus racemosa melanocarpa ≈ Sambucus melanocarpa	blackbead elder	Little (1976)

Sapium

Latin Name	English Name	Mapmaker	0	1	2
Sapium biloculare	jumping bean sapium	Little (1976)

Sapindus

Latin Name	English Name	Mapmaker	0	1	2
Sapindus drummondii	western soapberry	Little (1976,77)
Sapindus saponaria	wingleaf soapberry	Little (1977,78)

Sassafras

Latin Name	English Name	Mapmaker	0	1	2
Sassafras albidum	sassafras	Little (1971)

Savia

Latin Name	English Name	Mapmaker	0	1	2
Savia bahamensis	maidenbush	Little (1978)

Schaefferia

Latin Name	English Name	Mapmaker	0	1	2
Schaefferia frutescens	Florida boxwood	Little (1978)

Schoepfia

Latin Name	English Name	Mapmaker	0	1	2
Schoepfia chrysophylloides	graytwig	Little (1978)

Sequoiadendron

Latin Name	English Name	Mapmaker	0	1	2	3
Sequoiadendron giganteum	giant sequoia	Little (1971)

Sequoia

Latin Name	English Name	Mapmaker	0	1	2	3
Sequoia sempervirens	redwood	Little (1971)

Serenoa

Latin Name	English Name	Mapmaker	0	1	2
Serenoa repens	saw palmetto	Little (1977)

Shepherdia

Latin Name	English Name	Mapmaker	0	1	2
Shepherdia argentea	silver buffaloberry	Little (1977,76)

Simarouba

Latin Name	English Name	Mapmaker	0	1	2
Simarouba glauca	paradise tree	Little (1978)

Solanum

Latin Name	English Name	Mapmaker	0	1	2
Solanum erianthum	mullein nightshade	Little (1977,78)

Sophora

Latin Name	English Name	Mapmaker	0	1	2
Sophora affinis	Texas sophora	Little (1977)
Sophora secundiflora	mescalbean	Little (1976)

Sorbus

Latin Name	English Name	Mapmaker	0	1	2
Sorbus americana	American mountain ash	Little (1977)
Sorbus decora	showy mountain ash	Little (1977)
Sorbus scopulina	Greene mountain ash	Little (1976)
Sorbus sitchensis	Sitka mountain ash	Little (1976)

Staphylea

Latin Name	English Name	Mapmaker	0	1	2
Staphylea bolanderi	Sierra bladdernut	Little (1976)
Staphylea trifolia	American bladdernut	Little (1977)

Stewartia

Latin Name	English Name	Mapmaker	0	1	2
Stewartia malacodendron	Virginia stewartia	Little (1977)
Stewartia ovata	mountain stewartia	Little (1977)

Styrax

Latin Name	English Name	Mapmaker	0	1	2
Styrax americana	American snowbell	Little (1977)
Styrax grandifolia	bigleaf snowbell	Little (1977)
Styrax platanifolia	sycamore leaf snowbell	Little (1977)

Suriana

Latin Name	English Name	Mapmaker	0	1	2
Suriana maritima	baycedar	Little (1978)

Swietenia

Latin Name	English Name	Mapmaker	0	1	2
Swietenia mahagoni	West Indies mahogany	Little (1978,71)

Symplocos

Latin Name	English Name	Mapmaker	0	1	2
Symplocos tinctoria	common sweetleaf	Little (1977)

Taxodium

Latin Name	English Name	Mapmaker	0	1	2
Taxodium distichum	baldcypress	Little (1971)
Taxodium mucronatum	Montezuma baldcypress	Little (1971)

Taxus

Latin Name	English Name	Mapmaker	0	1	2
Taxus brevifolia	Pacific yew	Little (1971)
Taxus canadensis	Canada yew	Little (1971)
Taxus floridana	Florida yew	Little (1971)

Tetrazygia

Latin Name	English Name	Mapmaker	0	1	2
Tetrazygia bicolor	Florida tetrazygia	Little (1978)

Thrinax

Latin Name	English Name	Mapmaker	0	1	2
Thrinax morrisii	key thatchpalm	Little (1978)
Thrinax radiata	Florida thatchpalm	Little (1978)

Thuja

Latin Name	English Name	Mapmaker	0	1	2
Thuja occidentalis	northern white cedar	Little (1971)
Thuja plicata	western redcedar	Little (1971)

Tilia

Latin Name	English Name	Mapmaker	0	1	2
Tilia americana	American basswood	Little (1971)
Tilia caroliniana	Carolina basswood	Little (1977)
Tilia heterophylla	white basswood	Little (1971)

Torreya

Latin Name	English Name	Mapmaker	0	1	2
Torreya californica	California torreya	Little (1971)
Torreya taxifolia	Florida torreya	Little (1971)

Toxicodendron

Latin Name	English Name	Mapmaker	0	1	2
Toxicodendron vernix	poison sumac	Little (1977)

Trema

Latin Name	English Name	Mapmaker	0	1	2
Trema lamarckiana	West Indies trema	Little (1978)
Trema micrantha	Florida trema	Little (1978)

Ulmus

Latin Name	English Name	Mapmaker	0	1	2	3	4
Ulmus americana	American elm	Little (1971)
Ulmus rubra	slippery elm	Little (1971)
Ulmus thomasii	rock elm	Little (1971)
Ulmus alata	winged elm	Little (1971)
Ulmus serotina	September elm	Little (1971)
Ulmus crassifolia	cedar elm	Little (1971)

Umbellularia

Latin Name	English Name	Mapmaker	0	1	2
Umbellularia californica	California laurel	Little (1971)

Ungnadia

Latin Name	English Name	Mapmaker	0	1	2
Ungnadia speciosa	Mexican buckeye	Little (1976)

Vaccinium

Latin Name	English Name	Mapmaker	0	1	2
Vaccinium arboreum	tree sparkleberry	Little (1977)

Vauquelinia

Latin Name	English Name	Mapmaker	0	1	2
Vauquelinia californica	Torrey vauquelinia	Little (1976)
Vauquelinia pauciflora	fewflower vauquelinia	Little (1976)

Viburnum

Latin Name	English Name	Mapmaker	0	1	2	3
Viburnum lentago	nannyberry	Little (1976,77)
Viburnum trilobum =V. opulus var. americanum =V. opulus ssp. trilobum	American cranberrybush	Little (1976,77)
Viburnum prunifolium	blackhaw	Little (1977)
Viburnum rufidulum	rusty blackhaw	Little (1977)
Viburnum nudum	possumhaw viburnum	Little (1977)
Viburnum obovatum	Walter viburnum, small-leaf arrowwood	Little (1977)

Washingtonia

Latin Name	English Name	Mapmaker	0	1	2
Washingtonia filifera	California washingtonia	Little (1976)

Ximenia

Latin Name	English Name	Mapmaker	0	1	2
Ximenia americana	tallowwood	Little (1978)

Yucca

Latin Name	English Name	Mapmaker	0	1	2
Yucca aloifolia	aloe yucca	Little (1977)
Yucca brevifolia	Joshua tree	Little (1976)
Yucca carnerosana	Carneros yucca	Little (1976)
Yucca elata	soaptree yucca	Little (1976)
Yucca faxoniana	Faxon yucca	Little (1976)
Yucca gloriosa	moundlily yucca	Little (1977)
Yucca mohavensis	Mohave yucca	Little (1976)
Yucca rostrata	beaked yucca	Little (1976)
Yucca schottii	Schotts yucca	Little (1976)
Yucca torreyi	Torrey yucca	Little (1976)
Yucca treculeana	Trecul yucca	Little (1976)

Zanthoxylum

Latin Name	English Name	Mapmaker	0	1	2
Zanthoxylum americanum	common prickly ash	Little (1977)
Zanthoxylum clava-herculis	Hercules club	Little (1977)
Zanthoxylum coriaceum	Biscayne prickly ash	Little (1978)
Zanthoxylum fagara	lime prickly ash	Little (1977,78)
Zanthoxylum flavum	West Indies satinwood	Little (1978)
Zanthoxylum hirsutum	Texas Hercules club	Little (1977)