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Roadside Use of Native Plants

All Plant Species Listed in Potential Natural Vegetation of the United States

Kuchler, 1985

Some species names listed in the 1964 edition and in the 1985 revision of Potential Natural Vegetation (Kuchler, 1964; 1985) have been changed based on current research into vegetation species relationships. The names of all species listed were compared with the currently accepted names listed in Kartesz (1994). If a species name has been changed, the old name is in italics followed by the currently accepted name in normal font. Some species names could not be located in Kartesz (1994) and, for this reason, the accepted name could not be verified. These species are designated by an asterisk (*).

Citation: J.T. Kartesz. 1994. A Synonymized Checklist of the Vascular Flora of the United States, Canada, and Greenland. Second Edition. Vol. 1: Checklist, Vol. 2: Thesaurus. Timber Press, Portland, Oregon.

 ABCDEFGH/IJ/KLMN/OPQRSTU/V/W/X/Y/Z 

Abies amabilis
Abies balsamea
Abies concolor
Abies fraseri
Abies grandis
Abies lasiocarpa
Abies lasiocarpa var. arizonica
Abies magnifica
Abies procera
Acacia berlandieri
Acacia constricta
Acacia greggii
Acacia rigidula
Acer barbatum
Acer circinatum
Acer glabrum
Acer grandidentatum
Acer macrophyllum
Acer negundo
Acer nigrum
Acer pensylvanicum
Acer rubrum
Acer rubrum var. drummondii
Acer saccharum Acer spicatum
Achillea millefolium var. lanulosa — Achillea millefolium var. occidentalis
Achillea millefolium
Adenostoma fasciculatum
Aesculus californica
Aesculus glabra
Aesculus octandra — Aesculus flava
Agave lechuguilla
Agropyron smithii — Pascopyrum smithii
Agropyron spicatum — Pseudoroegneria spicata ssp. spicata
Agropyron trachycaulum — Elymus trachycaulus ssp. trachycaulus
Agrostis hallii
Agrostis tenuis — Agrostis capillaris
Allenrolfea occidentalis
Alnus rubra
Alnus tenuifolia — Alnus incana ssp. tenuifolia
Aloysia ligustrina*
Ambrosia psilostachya
Amelanchier alnifolia
Amelanchier arborea
Amelanchier utahensis
Amorpha canescens
Ampelopsis arborea
Amphicarpa bracteata
Andropogon barbinodis — Bothriochloa barbinodis var. barbinodis
Andropogon gerardi
Andropogon glomeratus
Andropogon hallii
Andropogon littoralis — Schizachyrium scoparium ssp. littorale
Andropogon saccharoides — Bothriochloa saccharoides
Andropogon scoparius — Schizachyrium scoparium ssp.scoparium
Andropogon tener — Schizachyrium tenerum
Andropogon ternarius
Andropogon virginicus
Annona glabra
Antennaria neglecta
Aquilegia pubescens
Arbutus menziesii
Arctostaphylos glandulosa
Arctostaphylos glauca
Arctostaphylos manzanita
Arctostaphylos mariposa — Arctostaphylos viscida ssp. mariposa
Arctostaphylos nevadensis
Arctostaphylos nummularia
Arctostaphylos parryana
Arctostaphylos parryana var. pinetorum
Arctostaphylos patula
Arctostaphylos pungens
Arctostaphylos uva ursi
Arctostaphylos viscida
Arenaria patula — Minuartia patula var. patula
Aristida affinis — Aristida purpurascens var. purpurascens
Aristida divaricata
Aristida glabrata — Aristida californica var. glabrata
Aristida glauca — Aristida purpurea var. neafleyi
Aristida hamulosa — Aristida ternipes var. hamulosa
Aristida intermedia — Aristida longespica var. geniculata
Aristida longiseta — Aristida purpurea var. longiseta
Aristida longispica
Aristida patula
Aristida purpurea
Aristida roemeriana — Aristida purpurea var. purpurea
Aristida spiciformis
Aristida stricta
Aristida tenuispica — Aristida purpurascens var. tenuispica
Aristida wrightii — Aristida purpurea var. wrightii
Arnica cordifolia
Artemisia arbuscula
Artemisia californica
Arternisia cana
Artemisia canadensis — Artemisia campestris var. borealis
Artemisia dranunculus
Artemisia filifolia
Artemisia frigida
Artemisia ludoviciana
Artemisia nova
Artemisia spinescens
Artemisia tridentata
Artemisia tripartita
Asclepias arenaria
Aster cichoriaceus — Machaeranthera canescens var. aristata
Aster ericoides — Aster subulatus var. ligulatus
Aster exilis
Aster laevis
Astragalus platytropis
Atriplex canescens
Atriplex confertifolia
Avicennia nitida — Avicennia germinans
Axonopus compressus
Axonopus furcatus

 A — B — CDEFGH/IJ/KLMN/OPQRSTU/V/W/X/Y/Z 

Baccharis emoryi
Baccharis halimifolia
Baccharis sergiloides
Baileya multiradiata
Balsamorrhiza sagittata
Baptisia leucantha — Baptisia alba var. macrophylla
Batis maritima
Berberis fremontii — Mahonia fremontii
Berberis nervosa — Mahonia nervosa var. nervosa
Berchemia scandens
Betula alleghaniensis
Betula lenta
Betula nigra
Betula papyrifera
Betula populifolia
Blechnum serrulatum
Blepharoneuron tricholepis
Boehmeria cylindrica
Bouteloua breviseta
Bouteloua curtipendula
Bouteloua eriopoda
Bouteloua filiformis — Bouteloua repens
Bouteloua gracilis
Bouteloua hirsuta
Bouteloua rigidiseta
Bouteloua trifida
Brayodendron texanum*
Brodiaea pulchella — Dichelostemma congestum
Bromus laevipes
Buchloe dactyloides
Bumelia lanuginosa — Sideroxylon lanuginosum ssp. lanuginosum
Bumelia tenax — Sideroxylon tenax
Bursera simaruba

 AB — C — DEFGH/IJ/KLMN/OPQRSTU/V/W/X/Y/Z 

Calamagrostis canadensis
Calamagrostis nutkaensis
Calamagrostis rubescens
Calamovilfa longifolia
Calliandra eriophyllua
Calochortus luteus
Campsis radicans
Carex eleocharis — Carex duriuscula
Carex filifolia
Carex geyeri
Carex heliophila — Carex inops ssp. heliophila
Carex senta
Carex tumulicola
Carpinus caroliniana
Carya aquatica
Carya cordiformis
Carya floridana
Carya glabra
Carya illinoinensis
Carya ovata
Carya texana
Carya tomentosa — Carya alba
Castanea dentata
Castanopsis chrysophylla
Castanopsis sempervirens
Castilleja culbertsonii — Castilleja lemmonii
Ceanothus cordulatus
Ceanothus cuneatus
Ceanothus fendleri
Ceanothus foliosus
Ceanothus impressus
Ceanothus integerrimus
Ceanothus leucodermis
Ceanothus parryi
Ceanothus sorediatus — Ceanothus oliganthus ssp. sorediatus
Ceanothus spinosus
Ceanothus thyrsiflorus
Ceanothus velutinus
Celastrus scandens
Celtis laevigata
Celtis occidentalis
Celtis pallida
Celtis reticulata — Celtis laevigata var. reticulata
Celtis tenuifolia
Cenchrus myosuroides
Cenchrus tribuloides
Centella repanda — Centella erecta
Cephalanthus occidentalis
Ceratiola ericoides
Cercidium floridum — Parkinsonia florida
Cercidium macrum — Parkinsonia texana var. macra
Cercidium microphyllum — Parkinsonia microphylla
Cercis canadensis
Cercis canadensis var. texensis
Cercis occidentalis — Cercis canadensis var. texensis
Cercocarpus betuloides — Cercocarpus montanus var. glaber
Cercocarpus ledifolius
Cereus giganteus — Carnegia gigantea
Chamaebatia foliolosa
Chamaebatiaria millefolium
Chamaecyparis lawsoniana
Chamaedaphne calyculata
Cheilanthes lanosa
Chiococca pinetorum — Chiococca parvifolia
Chrysobalanus icaco
Chrysopsis bolanderi — Heterotheca bolanderi
Chrysopsis graminifolia — Pityopsis graminifolia var. graminifolia
Chrysopsis villosa — Heterotheca villosa var. villosa
Chrysothamnus nauseosus
Chrysothamnus viscidiflorus
Cladonia pycnocladia
Clematis fremontii*
Clematis neomexicana — Clematis ligusticifolia var. ligusticifolia
Clematis virginiana
Collinsia parviflora
Coccoloba diversifolia
Coccothrinax argentata
Coleogyne ramosissima
Comandra richardsiana — Comandra umbellata ssp. umbellata
Condalia lycioides — Ziziphus obtusifolia var. obtusifolia
Condalia obovata — Condalia hookeri var. hookeri
Condalia spathulata
Conocarpus erectus
Cornus florida
Cornus nutallii
Cowania mexicana — Purshia mexicana
Croton monanthogynus
Croton punctatus
Cryptantha hoffmannii
Cryptantha roosiorum
Cucurbita digitata
Cucurbita foetidissima
Cupressus goveniana
Cupressus macrocarpa
Cymopterus cinerarius
Cyperus haspan
Cyrilla racemiflora

 ABC — D — EFGH/IJ/KLMN/OPQRSTU/V/W/X/Y/Z 

Dalea enneandra
Dalea spinosa — Psorothamnus spinosus
Danthonia californica
Dasylirion leiophyllum
Dasylirion wheeled
Deschampsia cespitosa
Deschampsia holciformis — Deschampsia cespitosa ssp. holciformis
Diospyros virginiana
Dipholis salicifolia — Sideroxylon salicifolium
Distichlis spicata
Draba verna
Drypetes diversifolia

 ABCD — E — FGH/IJ/KLMN/OPQRSTU/V/W/X/Y/Z 

Echinacea angustifolia
Echinocereus engelmannii
Elymus canadensis
Elymus glaucus
Elymus triticoides — Leymus triticoides
Elyonurus tripsacoides
Encelia californica
Encelia farinosa
Ephedra antisyphilitica
Ephedra torreyana
Ephedra trifurca
Ephedra viridis
Eragrostis elliottii — Eragrostis campestris
Eragrostis spectabilis
Eragrostis trichodes
Erigeron compositus
Erigeron quercifolius
Erigeron strigosus
Eriodyction californicum
Eriogonum annuum
Eriogonum fasciculatum
Eriogonum incanum
Eriophyllum confertiflorum
Erysimum asperum
Eschscholzia californica
Eupatorium capillifolium
Euphorbia corollata
Euploca convolvulacea — Heliotropium convolvulaceum
Eurotia lanata — Krascheninnikovia lanata
Exothea paniculata

 ABCDE — F — GH/IJ/KLMN/OPQRSTU/V/W/X/Y/Z 

Fagus grandifolia
Fallugia paradoxa
Ferocactus wislizeni
Festuca arizonica
Festuca californica
Festuca idahoensis
Festuca pacifica — Vulpia microstachys var. pauciflora
Festuca rubra
Festuca scabrella — Festuca campestris
Festuca viridula
Ficus aurea
Flourensia cernua
Foresteria acuminata
Forestiera lingustrina
Fouquieria splendens
Franseria acanthicarpa — Ambrosia acanthicarpa
Franseria deltoidea — Ambrosia deltoidea
Franseria dumosa — Ambrosia dumosa
Fraxinus americana
Fraxinus caroliniana
Fraxinus latifolia
Fraxinus pennsylvanica
Fraxinus texensis
Fremontia californica — Fremontodendron californicum

 ABCDEF — G — H/IJ/KLMN/OPQRSTU/V/W/X/Y/Z 

Galium tinctorium
Garberia fruticosa — Garberia heterophylla
Gaultheria shallon
Gaura coccinea
Gaylussacia baccata
Gerardia maritima — Agalinis maritima
Gilia longifolia — Ipomopsis longifolia var. longifolia
Gleditsia aquatica
Gleditsia triacanthos
Gordonia lasianthus
Grayia spinosa
Grindelia hirsutula
Grindelia squarrosa
Guettarda elliptica
Guettarda scabra
Gutierrezia lucida — Gutierrezia microcephala
Gutierrezia sarothrae

 ABCDEFG — H/I — J/KLMN/OPQRSTU/V/W/X/Y/Z 

Halesia carolina var. monticola — Halesia tetraptera var. monticola
Haplopappus gilmani — Ericameria gilmanii
Haplopappus linearifolius — Ericameria linearifolia
Haplopappus spinulosus — Machaeranthera pinnatifida var. pinnatifida
Haplopappus squarrosus — Hazardia squarrosa var. squarrosa
Hedeoma hispida
Eleocharis palustris
Helianthus grosseserratus
Helianthus anomalus
Helianthus petiolaris
Heteromeles arbutifolia
Heteropogon contortus
Hieracium albertinum — Hieracium cynoglossoides
Hilaria belangeri
Hilaria jamesii
Hilaria mutica
Holodiscus discolor
Holodiscus dumosus
Hordeum jubatum
Horkelia cuneata
Hymenoclea monogyra
Hypericum fasciculatum
Ilex cassine
Ilex decidua
Ilex glabra
Ilex opaca
Ilex verticillata
Ilex vomitoria
Ipomea littoralis
Ipomea pes-caprae
Ipomopsis aggregata
Iris douglasiana
Iva frutescens

 ABCDEFGH/I — J/K — LMN/OPQRSTU/V/W/X/Y/Z 

Jamesia americana
Janusia gracilis
Jatropha cardiophylla
Juglans californica
Juglans nigra
Juncus effusus
Juncus gerardi
Juncus roemerianus
Juniperus ashei
Juniperus communis
Juniperus communis var. montana
Juniperus deppeana
Juniperus monosperma
Juniperus occidentalis
Juniperus osteosperma
Juniperus pinchotii
Juniperus scopulorum
Juniperus virginiana
Kalmia angustifolia
Kalmia latifolia
Kalmia polifolia
Kochia americana
Koeberlinia spinosa
Koeleria cristata — Koeleria macrantha

 ABCDEFGH/IJ/K — L — MN/OPQRSTU/V/W/X/Y/Z 

Laguncularia racemosa
Larix laricina
Larix lyallii
Larix occidentalis
Larrea divaricata — Larrea tridentata var. tridentata
Ledum glandulosum
Ledum groenlandicum
Leersia hexandra
Leptochloa dubia
Leucophyllum frutescens
Liatris aspera
Liatris punctata
Liatris scarrosa
Librocedrus decurrens — Calocedrus decurrens
Limonium carolinianum
Liquidambar styraciflua
Liriodendron tulipifera
Liriodendron tulipifera
Lithocarpus densiflorus
Lithophragma bulbifera — Lithophragma glabrum
Lithospermum ruderale
Lupinus bicolor
Lupinus formosus
Lupinus luteolus
Lupinus sericeus
Lupinus variicolor — Lupinus versicolor
Luzula spicata
Lycium andersonii
Lycium cooperi
Lycurus phleoides
Lyonia ferruginea
Lyonia fruticosa
Lyonia nitida*
Lysiloma bahamensis — Lysiloma latisiliquum

 ABCDEFGH/IJ/KL — M — N/OPQRSTU/V/W/X/Y/Z 

Magnolia acuminata
Magnolia fraseri
Magnolia grandiflora
Magnolia macrophylla
Magnolia tripetala
Magnolia virginiana
Mariscus jamaicensis — Cladium mariscus ssp. jamaicense
Melica bulbosa
Menodora spinescens
Mentzelia pumila
Menziesia ferruginea
Metopium toxiferum
Monadra fistulosa
Monroa squarrosa
Mortonia scabrella — Mortonia sempervirens ssp. scabrella
Muhlenbergia cuspidata
Muhlenbergia montana
Muhlenbergia porteri
Muhlenbergia pungens
Muhlenbergia torreyi
Myrica californica
Myrica cerifera
Myrica pensylvanica

 ABCDEFGH/IJ/KLM — N/O — PQRSTU/V/W/X/Y/Z 

Nectandra coriacea
Nemopanthus mucronatus
Nolina microcarpa
Nolina texana
Nyssa aquatica
Nyssa silvatica
Nyssa silvatica var. biflora — Nyssa biflora
Oenothera albicaulis
Oenothera serrulata — Calylophus serrulatus
Olneya tesota
Opuntia engelmannii
Opuntia fulgida
Opuntia imbricata
Opuntia spinosior
Opuntia versicolor
Opuntia whipplei
Orthocarpus spp.
Oryzopsis hymenoides
Osmanthus americanus
Osmunda cinnamomea
Osmunda regalis
Ostrya virginiana
Oxalis oregana
Oxydendrum arboreum
Oxyria digyna

 ABCDEFGH/IJ/KLMN/O — P — QRSTU/V/W/X/Y/Z 

Pachystima myrsinites*
Palafoxia callosa
Panicum amarum
Panicum hemitomon
Panicum leibergii — Dichanthelium leibergii
Panicum obtusum
Panicum repens
Panicum scribnerianum — Dichanthelium oligosanthes var. scribnerianum
Panicum virgatum
Pappophorum bicolor
Paronychia jamesii
Parthenium incanum
Parthenocissus quinquefolia
Paspalum dilatatum
Paspalum monostachyum
Paspalum plicatulum
Pedicularis attollens
Peltandra virginica
Pentstemon fruticosus
Pentstemon heterodoxus
Pentstemon scapoides*
Persea borbonia
Persea humilis
Persea virginiana*B Petalostemon purpureum — Dalea purpurea var. purpurea
Petalostemon villosum — Dalea villosa var. villosa
Phleum alpinum
Phlox caespitosa
Phlox pilosa
Phragmites communis — Phragmites australis
Physocarpus capitatus
Physocarpus malvaceus
Physocarpus monogynus
Picea engelmannii
Picea glauca
Picea mariana
Picea pungens
Picea rubens
Pickeringia montana
Pinus albicaulis
Pinus aristata
Pinus balfouriana
Pinus banksiana
Pinus cembroides
Pinus clausa
Pinus contorta
Pinus coulteri
Pinus echinata
Pinus edulis
Pinus elliottii
Pinus elliottii var. densa
Pinus flexilis
Pinus jeffreyi
Pinus lambertiana
Pinus leiophylla var. chihuahuana
Pinus monticola
Pinus muricata
Pinus ponderosa
Pinus radiata
Pinus resinosa
Pinus rigida
Pinus sabiniana
Pinus serotina
Pinus strobus
Pinus taeda
Piscidia piscipula
Planera aquatica
Plantago decipiens*
Platanus occidentalis
Pleurochaete squarrosa*
Poa arida
Poa fendleriana
Poa scabrella
Poliomintha incana
Polygonum acre — Polygonum punctatum var. punctatum
Polystichum munitum
Populus deltoides
Populus fremontii
Populus grandidentata
Populus heterophylla
Populus sargentii — Populus deltoides ssp. monilifera
Populus tremuloides
Populus trichocarpa — Populus balsmamifera ssp. trichocarpa
Potentilla blaschkeana — Populus gracilis var. nuttallii
Potentilla breweri
Potentilla diversifolia
Prosopis juliflora var. torreyana — Prosopsis glandulosa var. torreyana
Prosopis juliflora var. velutina — Prosopsis velutina
Prosopis juliflora var. glandulosa — Prosopsis glandulosa var. glandulosa
Prosopis pubescens
Prunus angustifolia
Prunus emarginata
Prunus ilicifolia
Prunus serotina
Prunus virginiana
Pseudotsuga macrocarpa
Pseudotsuga menziesii
Psoralea argophylla — Pediomelum argophyllum
Psoralea floribunda — Psoralidium tenuiflorum
Psoralea tenuiflora — Psoralidium tenuiflorum
Pteridium aquilinum var. pubescens
Purshia tridentata

 ABCDEFGH/IJ/KLMN/OP — Q — RSTU/V/W/X/Y/Z 

Quercus agrifolia
Quercus alba
Quercus chapmanii
Quercus chrysolepis
Quercus coccinea
Quercus douglasii
Quercus dumosa
Quercus durandii var. breviloba — Quercus sinuata var. breviloba
Quercus ellipsoidalis
Quercus emoryi
Quercus englemannii
Quercus falcata
Quercus falcata var. pagodaefolia — Quercus pagoda
Quercus gambelii
Quercus garryana
Quercus grisea
Quercus havardii
Quercus hypoleucoides
Quercus ilicifolia
Quercus imbricaria
Quercus incana
Quercus kelloggii
Quercus laevis
Quercus lobata
Quercus lyrata
Quercus macrocarpa
Quercus marilandica
Quercus michauxii
Quercus nigra
Quercus mohriana
Quercus muehlenbergii
Quercus myrtifolia
Quercus oblongifolia
Quercus prinus
Quercus rubra
Quercus shumardii
Quercus stellata
Quercus turbinella
Quercus undulata — Quercus x pauciloba
Quercus vacciniifolia
Quercus velutina
Quercus virginiana
Quercus virginiana var. fusiformis — Quercus fusiformis
Quercus virginiana var. maritima — Quercus maritima
Quercus wislizeni

 ABCDEFGH/IJ/KLMN/OPQ — R — STU/V/W/X/Y/Z 

Ranunculus californicus
Rapanea guianensis — Myrsine floridana
Ratibida columnifera
Ratibida pinnata
Redfieldia flexuosa
Rhamnus califomica — Frangula californica ssp. californica
Rhizophora mangle
Rhododendron catawbiense
Rhododendron macrophyllum
Rhus aromatica
Rhus aromatica var. pilosissima — Rhus trilobata var. pilosissima
Rhus choriophylla — Rhus virens var. choriophylla
Rhus diversiloba — Toxicodendron diversilobum
Rhus integrifolia
Rhus radicans — Toxicodendron radicans ssp. radicans
Rhus trilobata
Rhynchospora dodecandra — Rhynchospora megalecarpa
Rhynchospora filifolia
Ribes cereum
Ribes nevadense
Ribes quercetorum
Ribes roezlii
Rosa arkansana
Rosa nutkana
Rubus canadensis
Rubus parviflorus
Rubus spectabilis
Rynchospora divergens*

 ABCDEFGH/IJ/KLMN/OPQR — S — TU/V/W/X/Y/Z 

Sabal palmetto
Sagittaria lancifolia
Salicomia perennis — Sarcocornia perennis
Salix amygdaloides
Salix bebbiana
Salix caroliniana
Salix gooddingii
Salix nigra
Salix nivalis — Salix reticulata ssp. nivalis
Salix petrophila — Salix arctica
Salsola kali
Salvia apiana
Salvia leucophylla
Salvia mellifera
Sambucus glauca — Sambucus cerulea var. cerulea
Sambucus racemosa
Sambucus simpsonii — Sambucus canadensis
Sanicula arctopoides
Sapindus saponaria
Sarcobatus vermiculatus
Saururus cernuus
Schedonnardus paniculatus
Scirpus acutus
Scirpus americanus
Scirpus californicus
Scirpus olneyi — Scirpus americanus
Scirpus validus — Scirpus tabernaemontani
Scleropogon brevifolius
Scutellaria resinosa
Sedum pulchellum
Sequoia sempervirens
Serenoa repens
Sesuvium portulacastrum
Setaria macrostachya
Shepherdia canadensis
Sibbaldia procumbens
Sideroxylon foetidissimum
Sieversia turbinata
Silphium laciniatum
Simarouba glauca
Simmondsia chinensis
Sisyrinchium bellum
Sitanion hystrix — Elymus elymoides
Smilax hispida — Smilax tamnoides
Smilax laurifolia
Solidago altissima — Solidago canadensis var. scarba
Solidago missouriensis
Solidago mollis
Solidago rigida
Sorbus americana
Sorghastrum nutans
Spartina alterniflora
Spartina baked
Spartina cynosuroides
Spartina patens
Spartina spartinae
Sphaeralcea ambigua
Sphaeralcea coccinea
Sphaeralcea grossulariifolia
Sporobolus airoides
Sporobolus asper — Sporobolus compositus var. compositus
Sporobolus cryptandrus
Sporobolus flexuosus
Sporobolus heterolepis
Sporobolus neglectus
Sporobolus poiretti — Sporobolus indicus
Sporobolus vaginiflorus
Stellaria nitens
Stenosiphon linifolius
Stephanomeria pauciflora
Stillingia aquatica
Stipa cernus — Nassella cernua
Stipa comata
Stipa coronata
Stipa lepida — Nassella lepida
Stipa leucotricha — Nassella leucotricha
Stipa pinetorum
Stipa pulchra — Nassella pulchra
Stipa spartea
Stipa viridula — Nassella viridula
Suaeda torreyana — Suaeda moquinii
Swietenia mahogoni
Symphoricarpos albus
Symphoricarpos orbiculatus
Symphoricarpos vaccinoides — Symphoricarpos var. utahensis

 ABCDEFGH/IJ/KLMN/OPQRS — T — U/V/W/X/Y/Z 

Taxodium distichum
Taxodium distichum var. nutans — Taxodium ascendens
Taxus canadensis
Tetradymia canescens
Tetrazygia bicolor
Thuja occidentalis
Thuja plicata
Tilia americana
Tilia heterophylla — Tilia americana var. heterophylla
Tillandsia utriculata
Trichostema lanatum
Triclochin maritima*
Tridens pilosus — Erioneuron pilosum
Trisetum spicatum
Tsuga canadensis
Tsuga heterophylla
Tsuga mertensiana
Typha angustifolia
Typha domingensis
Typha latifolia

 ABCDEFGH/IJ/KLMN/OPQRST — U/V/W/X/Y/Z 

Ulmus alata
Ulmus americana
Ulmus crassifolia
Ulmus rubra
Umbellularia californica
Uniola paniculata
Utricularia juncea
Vaccinium membranaceum
Vaccinium myrsinites
Vaccinium ovatum
Vancouveria parvifolium
Viburnum alnifolium
Vitis munsonia — Vitis rotundifolia var. munsoniana
Whipplea modesta
Xanthoxylum insulare
Xerophyllum tenax*
Yucca aloifolia
Yucca baccata
Yucca elata
Yucca glauca
Yucca schottii
Yucca whipplei
Zinnia grandiflora
Zinnia pumila — Zinnia acerosa
Zizaniopsis miliacea

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Questions and feedback should be directed to Deirdre Remley (deirdre.remley@dot.gov, 202-366-0524).

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