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- Cabbage 1919-1932 (1, 107)
- Brassica L.
- Cabinet cherry
- 1900-1929 (156, 157, 158)
- Prunus serotina Ehrh.
- 1840 (19)
- Prunus virginiana L. [reported as: Cerasus virginianum]
- 1913 (5)
- Prunus virginiana L. var. virginiana [reported as: Padus virginiana (L.) P. Mill.]
- Cabomba 1913-1930 (5, 106)
- Cabomba caroliniana Gray
- Cabo'minaga'wûnj (Chippewa, smooth berry) 1928 (40)
- Ribes oxyacanthoides L. ssp. oxyacanthoides [reported as: Grossularia oxyacanthioides (L.) P. Mill.]
- Cabul clover 1900-1929 (5, 156, 157, 158)
- Melilotus officinalis (L.) Lam. [also reported as: Melilotus alba Desvar., possibly M. alba Medik.]
- Caca'gomin (Chippewa) 1928 (40)
- Cornus canadensis L.
- Cacia rose (French) 1785 (8)
- Robinia hispida L.
- Cactus 1905 (101) MT
- Opuntia polyacantha Haw.
- Cactus-apple [Cactus apple] Present (50)
- Opuntia engelmannii Salm-Dyck
- Cadio 1894 (150) NM
- Xanthium strumarium L. var. canadense (P. Mill.) Torr. & Gray [reported as: Xanthium canadense P. Mill.]
- Cadlock
- 1900-1929 (5, 157, 158)
- Brassica nigra (L.) W.D.J. Koch
- 1896-1913 (5, 76) Nova Scotia, corruption of charlock
- Raphanus raphanistrum L.
- Caenotus canadense 1879 (46)
- Conyza canadensis (L.) Cronq. var. canadensis [reported as: Erigeron canadensis L.]
- Caepa 1886 (110) Pliny
- Allium cepa L.
- Caesalpinia 1942 (155)
- Caesalpinia L.
- Caillelait commune (French) 1828 (7)
- Galium verum L.
- Caille-lait jaune (French) 1900 (158)
- Galium verum L.
- Calabash 1818-1886 (7, 10, 19, 110)
- Lagenaria siceraria (Molina) Standl. [also reported as: Cucurbita lagenaria L., Cucurbita lagenaria W., Lagenaria vulgaris Ser.]
- Calabash gourd 1876-1942 (92, 138, 155)
- Lagenaria siceraria (Molina) Standl. [also reported as: Lagenaria leucantha Rusby, Lagenaria vulgaris ]
- Calabassa (Spanish) (gourd) 1561 (107)
- Cucurbita pepo L.
- Calabazilla 1893-1929 (5, 75, 156, 157, 158) S. CA
- Cucurbita foetidissima Kunth [also reported as: Cucurbita perennis Gray, Pepo foetidissima (Kunth) Britton]
- Calami Radix 1828 (7)
- Acorus calamus L.
- Calamo aromatico (Spanish., Italian) 1900 (158)
- Acorus calamus L.
- Calamus 1818-Present (5, 10, 19, 49, 50, 53, 57, 58, 59, 64, 92, 93, 97, 121, 155, 156, 158)
- Acorus calamus L.
- Calamus Aromaticus (Off. Name) 1768-1828 (7, 165)
- Acorus calamus L.
- Calamus root [Calamus-root]
- 1932 (1)
- Acorus L.
- 1886-1937 (72, 85, 101, 122, 138, 156, 157)
- Acorus calamus L.
- Calcareous cryptantha Present (50)
- Cryptantha thyrsiflora (Greene) Payson
- Calceolaria 1900-1942 (155, 158)
- Hybanthus Jacq. [also reported as: Calceolaria Loefl.]
- Calf clover [Calf-clover] 1896-1923? (5, 76, 156, 158) Southold Long Island, obsolete by 1923
- Trifolium arvense L.
- Calf-kill [Calf kill] 1913 (5)
- Holcus lanatus L. [reported as: Nothoholcus lanatus (L.) Nash]
- Calf's-mouth [Calf's mouth] 1923 (156)
- Antirrhinum majus L.
- Calf-snout [Calf snout,] 1900-1913 (5, 158)
- Antirrhinum majus L.
- Calico aster Present (50)
- Present (50)
- Symphyotrichum lateriflorum (L.) A.& D. Lφve
- 1923-Present (50, 85, 155, 156) SD
- Symphyotrichum lateriflorum (L.) A.& D. Lφve var. lateriflorum[also reported as: Aster lateriflorus (L.) Britton]
- California amaranth Present (50)
- Amaranthus californicus (Moq.) S. Wats.
- California brickellbush Present (50)
- Brickellia californica (Torr. & Gray ) Gray
- California brickellia 1942 (155)
- Brickellia californica (Torr. & Gray ) Gray
- California brome 1977-Present (3, 50)
- Bromus carinatus H. & A.
- California clover
- 1884 (87) Southern states
- Medicago polymorpha L. [reported as: Medicago denticulata Willd.]
- 1919 (52)
- Medicago sativa L.
- California cress 1923 (156)
- Sisymbrium officinale (L.) Scop. [reported as: Erysimum officinale L.]
- California lilac 1895 (15)
- Ceanothus L.
- California loosestrife Present (50)
- Lythrum californicum Torr. & Gray
- California mustard 1896-1929 (76, 157, 158) Rumford ME
- Sisymbrium officinale (L.) Scop.
- California nettle Present (50)
- Urtica dioica L. ssp. gracilis (Aiton) Seland.
- California poppy [California-poppy, Californiapoppy]
- 1856-Present (50, 73, 122, 123, 138, 158)
- Eschscholzia Cham.
- 1895-Present (2, 50, 82, 106, 109, 155)
- Eschscholzia californica Cham. [also reported as: Escholtzia californica]
- 1850-Present (28, 50)
- Eschscholzia californica Cham. ssp. californica [also reported as: Eschscholzia californica var. crocea (Benth.) Jeps., Eschscholzia crocea Benth.]
- California rape 1949 (109)
- Sinapis arvensis L. [reported as: Brassica kaber Wheeler]
- California rose-mallow [California rosemallow] 1942 (155)
- Hibiscus moscheutos L. ssp. lasiocarpos (Cav.) O.J. Blanchard [reported as: Hibiscus californicus Kellogg]
- California thistle 1923 (156)
- Cirsium arvense (L.) Scop.
- California timothy or California timothy grass 1840-1896 (5, 11, 19, 45, 87, 88)
- Phalaris caroliniana Walt. [also reported as: Phalaris intermedia Bosc.]
- California vetch 1942 (155)
- Vicia americana Muhl. ex Willd. ssp. americana [reported as: Vicia californica Greene]
- California yellow mustard 1949 (109)
- Sinapis alba L. [reported as: Brassica hirta Moench]
- Calite 1894 (150) NM
- Chenopodium album L.
- Calite de agua (Spanish) 1894 (150) NM
- Amaranthus retroflexus L.
- Callicarpa 1785-1900 (8, 158)
- Callicarpa L.
- Callicarpa d'Amerique (French) 1785 (8)
- Callicarpa americana L.
- Calliopsis 1923 (138)
- Coreopsis tinctoria Nutt.
- Callirhoe 1894 (114) Neb
- Callirhoe alcaeoides (Michx.) Gray [reported as: Callirrhoe alceoides]
- Calmus 1894-1900 (75, 158) NJ
- Acorus calamus L.
- Calophanes 1900 (158)
- Dyschoriste Nees
- Caltrop [Caltrops]
- 1900-Present (50, 155, 158)
- Kallstroemia Scop.
- 1849-1900 (1, 13, 14, 15, 93, 158) Neb
- Tribulus L.
- 1913-1923 (80, 156) IA
- Tribulus terrestris L.
- Calycine madwort 1768 (165)
- Alyssum alyssoides (L.) L. [reported as: Alyssum calycinum L.]
- Calycocarpum Present (50)
- Calycocarpum Nutt.
- Calycose houstonia 1913-1937 (5, 97) OK
- Houstonia purpurea L. var. calycosa Gray [also reported as: Houstonia lanceolata (Poir.) Britton]
- Calypso
- 1900-1932 (1, 138, 158) for Calypso of Greek Mythology
- Calypso Salisb.
- 1900-1923 (138, 156, 158)
- Calypso bulbosa (L.) Oakes
- 1913 (5)
- Calypso bulbosa (L.) Oakes var. americana (R. Br. ex Ait. f.) Luer [reported as: Cytherea bulbosa (L.) House.]
- Camaru 1648 (107 ) Marcg.
- Physalis pubescens L.
- Camas [Camass, Kamas, Kmass]
- 1895-Present (2, 50, 109, 155) from camass or quamash the Indian name
- Camassia Lindl.
- 1805-1930 (14, 28, 35, 78, 101, 106, 156) from Nootka chamash (sweet)
- Camassia scilloides (Raf.) Cory [also reported as: Camassia esculenta (Ker.) Robins, Camassia esculenta Lindl.]
- 1939 (148) CO
- Zigadenus venenosus S. Wats. var. gramineus (Rydb.) Walsh ex M.E. Peck [reported as: Zygadenus intermedius [Rydb.]
- Camash 1932 (1)
- Camassia Lindl.
- Cameraria (Europe) 16th century (110)
- Lagenaria siceraria (Molina) Standl. [reported as: Lagenaria vulgaris Ser.]
- Camil 1900 (158) verbal corruption
- Achillea millefolium L.
- Camline 1900-1929 (156, 157, 158)
- Camelina sativa (L.) Crantz
- Cammock
- 1900 (158) misapplied
- Achillea millefolium L.
- 1900-1929 (5, 156, 157, 158)
- Hypericum perforatum L.
- Camomila Spuria 1828 (7)
- Anthemis cotula L.
- Camomile 1900-1936 (93, 158) Neb
- Matricaria L.
- Camomile Puante (French) 1828 (7)
- Anthemis cotula L.
- Camomille commune on d'Allemagne (French) 1900 (158)
- Matricaria recutita L. [ reported as: Matricaria chamomila L.]
- Camoroche 1900-1929 (157, 158)
- Argentina anserina (L.) Rydb. [also reported as: Potentilla anserina L.]
- Camp root 1913 (5)
- Geum aleppicum Jacq. [reported as: Geum strictum Aiton]
- Campanilla 1930 (106)
- Ipomoea L.
- Campanula humida 1783 (46) Manasseh Cutler 46
- Campanula aparinoides Pursh
- Campanula minor rotundifolia vulgaris 1704 (46) Tournefort
- Campanula rotundifolia L.
- Campanula serpyfolia 1622 (46) Bauhin
- Linnaea borealis L.
- Campanule (French) 1900 (158)
- Campanula rotundifolia L.
- Camphor geranium 1894 (75) Western MA
- Tanacetum parthenium (L.) Schultz-Bip. [reported as: Chrysanthemum parthenium(L.) Pers.]
- Camphor pluchea Present (50)
- Pluchea camphorata (L.) DC.
- Camphorweed [Camphor weed, Camphor-weed]
- 1986 (4)
- Heterotheca Cass.
- 1937-Present (50, 122, 124) TX
- Heterotheca subaxillaris (Lam.) Britton & Rusby
- Present (50)
- Pluchea Cass.
- Campion
- 1923-Present (50, 138, 155, 156)
- Lychnis L.
- 1818-1986 (1, 4, 10, 13, 15, 93, 109, 138, 156)
- Silene L. [also reported as: Cucubalus L., Melandrium Roehl.]
- Campion pink 1828-1876 (7, 92)
- Silene vulgaris (Moench) Garcke [also reported as: Cucubalus behen L.]
- Campsis Present (50)
- Campsis Lour.
- Can wíyape (Dakota Teton, tree-twiner)
- 1919 (37)
- Vitis cinerea (Engelm.) Millard
- 1919 (37)
- Vitis vulpina L.
- Canada & artischokki sub terra 1665 (107 ) H.R.P.
- Helianthus tuberosus L.
- Canada beed-ruby [Canada beedruby] 1942 (155)
- Maianthemum canadense Desf.
- Canada bent grass 1890 (68)
- Calamagrostis canadensis (Michx.) Beauv. var. macouniana (Vasey) Stebbins
- Canada brome 1977 (3)
- Bromus pubescens Muhl. ex Willd.
- Canada crook-neck 1900 (158)
- Cucurbita maxima Dcne.
- Canada erigeron 1900-1929 (157, 158)
- Conyza canadensis (L.) Cronq. var. canadensis [also reported as: Leptilon canadense (L.) Britton]
- Canada germander
- Present (50)
- Teucrium canadense L.
- Present (50)
- Teucrium canadense L. var. canadense
- Canada lily
- 1895-Present (2, 5, 50, 138, 155, 156, 157, 158)
- Lilium canadense L.
- Present (50)
- Lilium canadense L. ssp. canadense
- Canada lyme grass [Canada lyme-grass, Canadian lyme grass] 1901-1938 (5, 56, 66, 90, 119)
- Elymus canadensis L.
- Canada mayflower Present (50)
- Maianthemum canadense Desf.
- Canada mint 1942 (155)
- Mentha arvensis L. [reported as: Mentha canadensis L.]
- Canada moonseed 1892-1937 (5, 6, 8, 49, 53, 64, 97, 131, 156, 158)
- Maianthemum canadense Desf.
- Canada nettle 1840-1923 (5, 19, 92, 93, 156, 157, 158)
- Laportea canadensis (L.) Weddell [also reported as: Urtica canadensis L.,Urticastrum divaricatum (L.) Kuntze]
- Canada parrot's-feather [Canada parrotfeather] 1923-1942 (138, 155)
- Myriophyllum verticillatum L.
- Canada pea 1896-1923 (5, 76, 156, 158) Paris ME
- Vicia cracca L.
- Canada pest [Canada-pest]
- 1900 (158)
- Eustoma Salisb. ex G. Don
- 1894 (75, 158) Deer Lodge MT
- Eustoma exaltatum (L.) Salisb. ex G. Don ssp. russellianum (Hook) Kartesz [also reported as: Eustoma russellianum Griseb.]
- Canada plum 1879-1923 (46, 156)
- Prunus americana Marsh.
- Canada potato 1900-1923 (5, 156, 158)
- Helianthus tuberosus L.
- Canada root [Canada-root] 1828-1923 (5, 7, 64, 92, 156, 158)
- Asclepias tuberosa L.
- Canada sanicle 1942-1977 (3, 155)
- Sanicula canadensis L.
- Canada snakeroot [Canada snake root, Canada snake-root] 1828-1949 (7, 53, 57, 58, 64, 92, 109, 156, 158)
- Asarum canadense L.
- Canada spike-sedge [Canada spikesedge] Present (50)
- Eleocharis geniculata (L.) Roemer & J.A. Schultes
- Canada thistle
- 1869-Present (3, 4, 5, 19, 45, 49, 50, 56, 57, 58, 62, 63, 72, 75, 80, 82, 85, 93, 95, 106, 131, 145, 155, 156, 157, 158)
- Cirsium arvense (L.) Scop. [also reported as: Carduus arvensis (L.) Robson, Cnicus arvensis Hoffm.]
- 1860-1977 (160, 3)
- Cirsium undulatum (Nutt.) Spreng.
- Canada tickclover 1907-1986 (3, 4, 155)
- Desmodium canadense (L.) DC.
- Canada toadflax Present (50)
- Nuttallanthus canadensis (L.) D.A. Sutton
- Canada wild rye [Canada wildrye, Canada wild-rye] 1888-Present (3, 11, 50, 116, 140, 143, 146, 155)
- Elymus canadensis L.
- Canada wood-nettle [Canadian woodnettle] 1942-Present (50, 155)
- Laportea canadensis (L.) Weddell
- Canadian anemone [Canada anemone] 1899-Present (5, 50, 72, 82, 85, 93, 127, 131, 158) Book name
- Anemone canadensis L.
- Canadian black snakeroot [Canadian blacksnakeroot]
- Present (50)
- Sanicula canadensis L.
- Present (50)
- Sanicula canadensis L. var. canadensis
- Canadian blue grass [Canadian blue-grass, Canadian bluegrass, Canada blue grass, Canada blue-grass, Canada bluegrass] 1819-Present (3, 27, 50, 56, 68, 85, 94, 109, 111, 119, 122, 138, 140, 143, 155, 163)
- Poa compressa L.
- Canadian buffalo-berry [Canadian buffalo berry] 1899-1932 (5, 85, 93, 131, 156,158)
- Shepherdia canadensis Nutt. [also reported as: Lepargyraea canadensis (L.) Greene]
- Canadian bullberry [Canadian bull berry] 1878 (108)
- Shepherdia canadensis Nutt.
- Canadian bur
- 1898-1923 (92, 156, 157, 158)
- Cynoglossum officinale L.
- 1900 (158)
- Xanthium strumarium L. var. canadense (P. Mill.) Torr. & Gray [also reported as: Xanthium canadense P. Mill.]
- Canadian clearweed [Canada clearweed]
- 1942-Present (50, 155)
- Pilea pumila (L.) Gray
- Present (50)
- Pilea pumila (L.) Gray var. pumila
- Canadian cocklebur [Canada cockleburr] Present (50)
- Xanthium strumarium L. var. canadense (P. Mill.) Torr. & Gray
- Canadian columbine 1879 (46)
- Aquilegia canadensis L.
- Canadian dioiceous bonduc 1785 (8)
- Gymnocladus dioicus (L.) K. Koch [reported as: Guilandina dioica L.]
- Canadian elderberry 1919 (107)
- Sambucus nigra L. ssp. canadensis (L.) R. Bolli [reported as: Sambucus canadensis L.]
- Canadian fleabane [Canada fleabane]
- 1932-1936 (1, 93) Neb
- Erigeron L. [also reported as: Leptilon Raf.]
- 1828-1937 (5, 6, 7, 48, 49, 53, 55, 57, 58, 61, 85, 92, 93, 122, 156, 157, 158)
- Conyza canadensis (L.) Cronq. var. canadensis [also reported as: Erigeron canadensis L., Leptilon canadense (L.) Britton]
- Canadian garlic [Canada garlic] 1942 (155)
- Allium canadense L.
- Canadian ginger [Canada ginger] 1898-1923 (49, 156)
- Asarum canadense L.
- Canadian goldenrod [Canada golden-rod, Canadian golden-rod, Canada goldenrod]
- 1840-Present (4, 5, 19, 50, 62, 72, 80, 82, 85, 95, 97, 122, 127, 131, 138, 155, 156, 158)
- Solidago canadensis L.
- 1977-Present (3, 50)
- Teucrium canadense L. var. canadense
- 1977 (3)
- Solidago canadensis L. var. gilvocanescens Rydb.
- 1977 (3)
- Solidago canadensis L. var. hargeri Fern.
- 1977 (3)
- Solidago canadensis L. var. salebrosa (Piper) M.E.Jones
- 1977-Present (3, 50)
- Solidago canadensis L. var. scabra Torr. & Gray
-
- Canadian gooseberry [Canada gooseberry]
- 1942-Present (50, 155)
- Ribes oxyacanthoides L.
- Present (50)
- Ribes oxyacanthoides L. ssp. oxyacanthoides
- Canadian hawkweed [Canada hawkweed, Canadian hawk-weed]
- 1899-Present (5, 50, 72, 85, 131, 155, 156, 158)
- Hieracium canadense Michx.
- Present (50)
- Hieracium canadense Michx.var. canadense
- Canadian hemp [Canada hemp] 1882-1892 (6, 14, 49, 52, 53, 54, 55, 57, 64, 106, 156, 157, 158)
- Apocynum cannabinum L.
- Canadian honewort Present (50)
- Cryptotaenia canadensis (L.) DC.
- Canadian horseweed
- Present (50)
- Conyza canadensis (L.) Cronq.
- Present (50)
- Conyza canadensis (L.) Cronq. var. canadensis
- Canadian lettuce [Canada lettuce] 1900-Present (50, 80, 155, 157)
- Lactuca canadensis L.
- Canadian lousewort
- Present (50)
- Pedicularis canadensis L.
- Present (50)
- Pedicularis canadensis L. ssp. canadensis
- Canadian maidenhair [Canada maiden-hair] 1768-1879 (46, 165)
- Adiantum pedatum L.
- Canadian milkvetch [Canada milkvetch, Canada milk vetch]
- 1932-Present (3, 4, 50, 85, 155)
- Astragalus canadensis L.
- 1913-Present (5, 50, 93) Neb
- Astragalus canadensis L. var. canadensis [also reported as: Astragalus carolinianus L.]
- Canadian poplar
- 1857 (20)
- Populus Χcanadensis Moench [deltoides Χ nigra] [deltoides Χ nigra] [reported as: Populus canadensis]
- 1910 (135) MT
- Populus balsamifera L.
- Canadian rattleweed [Canadian rattle weed] 1913 (5)
- Astragalus canadensis L. var. canadensis [reported as: Astragalus carolinianus L.]
- Canadian red-berry elder [Canadian red-berried elder] 1785 (8)
- Sambucus nigra L. ssp. canadensis (L.) R. Bolli [reported as: Sambucus canadensis L.]
- Canadian rice [Canada rice] 1882-1913 (5, 14, 157, 158)
- Zizania aquatica L.
- Canadian rush [Canada rush] 1907-Present (5, 50, 72, 155) IA
- Juncus canadensis J. Gay ex Laharpe
- Canadian sea-buckthorn 1785 (8)
- Shepherdia canadensis Nutt. [reported as: Hippophae canadensis W.]
- Canadian shepherdia 1857 (20)
- Shepherdia canadensis Nutt.
- Canadian small-reed 1885 (90) ME
- Calamagrostis canadensis (Michx.) Beauv. [reported as: Deyeuxia canadensis Beauv.]
- Canadian tick-trefoil [Canada tick-trefoil] 1900-1936 (5, 72, 93, 158)
- Desmodium canadense (L.) DC.[also reported as: Meibomia canadense (L.) Kuntze]
- Canadian tree onion [Canada tree onion] 1768 (165)
- Allium canadense L.
- Canadian trifoliate sumach 1785 (8)
- Rhus aromatica Aiton [reported as: Rhus canadensis Marsh.]
- Canadian viburnum 1785 (8)
- Viburnum lentago L.
- Canadian violet [Canada violet]
- 1770-1942 (2, 5, 41, 72, 85, 93, 131, 138, 155, 156, 158)
- Viola canadensis L.
- 1977 (3)
- Viola canadensis L. var. rugulosa (Greene) A.S. Hitchc.
- Canadian waterweed [Canada waterweed] 1942-Present (50, 155)
- Elodea canadensis Michx. [also reported as: Anacharis canadensis (Michx.) Planch.]
- Canadian weed 1923 (156)
- Elodea canadensis Michx.
- Canadian white violet Present (50)
- Viola canadensis L.
- Canadian wild ginger [Canada wild ginger, Canada wildginger] 1895-Present (2, 50, 138, 155)
- Asarum canadense L.
- Canadian wild lettuce [Canada wild lettuce] 1900 (158)
- Lactuca canadensis L.
- Canadische Haselwurz (German) 1828 (7)
- Asarum canadense L.
- Canadische Hollunder (German) 1892 (6)
- Sambucus nigra L. ssp. canadensis (L.) R. Bolli [reported as: Sambucus canadensis L.]
- Canadische Lattich (German) 1892 (6)
- Lactuca canadensis L.
- Canadische Schlagenwurz (German) 1900 (158)
- Asarum canadense L.
- Canadischer Hanf (German) [Canadische Hanf (German)] 1892-1900 (6, 158)
- Apocynum cannabinum L.
- Canadisches Berufkraut (German) 1892-1900 (6, 158)
- Conyza canadensis (L.) Cronq. var. canadensis [also reported as: Erigeron canadensis L., Leptilon canadense (L.) Britton]
- Canadisches Mondkorn (German) 1900 (158)
- Menispermum canadense L.
- Canaigre 1900-1949 (37, 57, 107, 109, 122, 124, 138, 155, 158) TX
- Rumex hymenosepalus Torr.
- Canaigre dock Present (50)
- Rumex hymenosepalus Torr.
- Canape silvestra 1879 (46)
- Apocynum cannabinum L.
- Canary bird seed 1819 (12)
- Phalaris canariensis L.
- Canary grass [Canary-grass, Canarygrass]
- 1896-Present (1, 45, 50, 66, 93, 152, 155, 158)
- Phalaris L.
- 1900 (158)
- Phalaris arundinacea L.
- 1852-1977 (3, 56, 67, 85, 86, 90, 92, 107, 109, 111, 119, 122, 131, 155, 157, 158, 163)
- Phalaris canariensis L.
- 1885-1900 (45, 88, 158)
- Phalaris caroliniana Walt. [also reported as: Phalaris intermedia Bosc.]
- Canary seed
- 1818-1828 (7, 10)
- Phalaris L.
- 1876 (92)
- Phalaris canariensis L.
- Canary-grass [Canary grass]
- 1932 (1)
- Lepidium L.
- 1912 (62) IN
- Lepidium virginicum L.
- Canatillo 1913 (153) NM
- Ephedra L.
- Canby's aster Present (50)
- Symphyotrichum foliaceum (DC.) Nesom var. canbyi (Gray) Nesom
- Canby's blue grass [Canby's bluegrass, Canby bluegrass] 1942-1977 (3, 155)
- Poa secunda J. Presl. [also reported as: Poa canbyi (Scribn.) Piper]
- Canby's thorn 1913 (5)
- Crataegus crus-galli L. [reported as: Crataegus canbyi Sargent]
- Cancer jalap
- 1903 (5, 69)
- Phytolacca americana L.
- 1900-1923 (64, 156, 158)
- Phytolacca americana L. var. americana [also reported as: Phytolacca decandra L.]
- Cancer-drops [Cancer drops] 1828 (7)
- Orobanche uniflora L. [reported as: Thalesia uniflora (L.) Britton]
- Cancer-root [Cancer root]
- 1923 (156)
- Knautia arvensis (L.) Duby [reported as: Linaria elatine (L.) P. Mill.]
- 1900-1932 (1, 158)
- Orobanche L. [also reported as: Thalesia Raf., Anoplanthus Endl.,( possibly Orobanche)]
- 1905 (101) MT
- Orobanche fasciculata Nutt. [also reported as: Aphyllon fasciculatum Gray]
- 1840-1913 (5, 19, 93, 157, 158)
- Orobanche uniflora L. [also reported as: Thalesia uniflora (L.) Britton]
- 1892 (6, 49. 71)
- Phytolacca americana L. var. americana Phytolacca decandra L.]
- Cancerweed [Cancer weed, Cancer-weed]
- 1806 (35) Meriwether Lewis
- Possibly,Orobanche L.
- 1898-1923 (5, 49, 156, 158)
- Prenanthes alba L. [also reported as: Nabalus albus (L.) Hook.]
- 1929 (157)
- Prenanthes aspera Michx. [also reported as: Nabalus asper (Michx.) Torr. & Gray]
- 1840-1986 (3, 4, 5, 19, 92, 156)
- Salvia lyrata L.
- Cancerwort 1913 (5)
- Kickxia elatine (L.) Dumort. [reported as: Kickxia spuria (L.) Dumort.]
- Canchalagua 1856-1857 (123, 161) CA
- Leymus cinereus ( Scribn. & Merr.) A.Lφve [also reported as: Erythraea muehlenbergia Griseb., Erythrea muehlenbergia]
- Candle anemone [Candle anemony] 1923-Present (3, 4, 50, 109, 138, 155, 156)
- Anemone cylindrica Gray
- Candle rush 1913-1923 (5, 156)
- Juncus effusus L.
- Candle-tree 1923 (156)
- Catalpa speciosa (Warder) Warder ex Engelm.
- Candlewick [Candle-wick]
- 1900-1913 (5, 69, 158)
- Verbascum thapsus L.
- 1882-1923 (5, 14, 156, 157, 158)
- Typha latifolia L.
- Candlewick mullein [Candle-wick mullein] 1923 (156)
- Verbascum thapsus L.
- Candy grass [Candy-grass] 1888-Present (5, 11, 50, 75, 80, 93, 94, 119, 129, 152)
- Eragrostis cilianensis (All.) Vign. ex Janchen [also reported as: Eragrostis major Host]
- Candy-tuft gilia [Candytuft gilia] 1942 (155)
- Ipomopsis congesta (Hook.) V. Grant [reported as: Gilia iberidifolia Benth.]
- Cane 1898 (78) OH
- Sorghum Moench [reported as: Sorghum L.]
- Cane ash 1900-1929 (5, 156, 157, 158)
- Fraxinus americana L.
- Cane bluestem 1942-Present (3, 50, 155)
- Bothriochloa barbinodis (Lag.) Herter [also reported as: Andropogon barbinodis Lag.]
- Cane grass
- 1913 (5)
- Cynodon dactylon (L.) Pers. [reported as: Capriola dactylon (L.) Kuntze]
- 1932 (1)
- Phragmites Adans. [reported as: Phragmites Trin.]
- 1905 (101) MT
- Phragmites australis (Cav.) Trin. ex Steud. [reported as: Phragmites communis Trin.]
- Cane withy 1900 (158)
- Salix alba L. [reported as: Salix alba L. ssp. vitellina (L.) Arcang.]
- Canescent primrose 1937 (97) OK
- Oenothera macrocarpa Nutt. ssp. incana (Gray) Reveal [reported as: Megapterium argophyllum R.R. Gates]
- Canescent whitlow-grass [Canescent whitlow grass] 1913 (5)
- Draba breweri S. Wats. var. cana (Rydb.) Rollins [reported as: Draba stylaris J. Gay]
- Canker 1900 (158)
- Papaver rhoeas L.
- Canker rose 1900-1923 (5, 156, 158)
- Papaver rhoeas L.
- Canker-leaf [Canker leaf] 1898 (49)
- Pyrola americana Sweet [reported as: Pyrola rotundifolia L.]
- Canker-lettuce [Canker lettuce] 1869-1923 (5, 53, 58, 92, 156)
- Pyrola americana Sweet [also reported as: Pyrola rotundifolia L.]
- Canker-root [Canker root]
- 1913-1986 (3, 4, 5)
- Kickxia elatine (L.) Dumort.
- 1876 (92)
- Prenanthes alba L.
- Cankerweed [Canker weed] 1876 (92)
- Prenanthes alba L.
- Cankerwort 1900-1923 (5, 62, 64, 69, 156, 157, 158)
- Taraxacum officinale G.H. Weber ex Wiggers [also reported as: Leontodon taraxacum L., Taraxacum taraxacum L.]
- Cannab (Arabic) 1886 (110)
- Cannabis sativa L.
- Cannabis (Greek and Latin) 1886-1930 (110, 125) KS
- Cannabis sativa L.
- Cannabis indica 1902 (60)
- Cannabis sativa L.
- Canoe birch 1840-1986 (1, 2, 4, 5, 10, 20, 19, 37, 47, 72, 92, 93, 95, 109, 112, 113, 130, 131, 137, 138, 157, 158)
- Betula papyrifera Marsh. [also reported as: Betula papyracea Aiton]
- Canonotha 1879 (46)
- Lindera benzoin Blume. [reported as: Laurus benzoin L.]
- Cantaloupe 1919-Present (50, 82, 107, 138) IA
- Cucumis melo L.
- Canxlogan inkpa gmigmela (Lakota, small end rounded weed) 1918?-1970? (121)
- Chenopodium album L.
- Canyon cup grass [Canyon cupgrass] 1942-Present (50, 155)
- Eriochloa lemmonii Vasey & Scribn.
- Canyon shrub 1937 (112) Neb
- Rhus trilobata Nutt.
- Can pezuta cikala (Lakota, little wood medicine) 1918?-1970? (121)
- Mentha arvensis L.
- Can cjaxu (Lakota, chewing wood) 1918?-1970? (121)
- Populus deltoides Bartr. ex Marsh. ssp. monilifera (Aiton) Eckenwalder [reported as: Populus sargentii Dode.]
- Cani caxpe hu (Lakota, woody whip) 1918?-1970? (121)
- Urtica dioica L. ssp. gracilis (Aiton) Seland. [reported as: Urtica dioica L. var. procera (Muhl. ex Willd.) Weddell]
- Canijuwi skaska naxca (Lakota, possibly meaning loose white vine) 1918?-1970? (121)
- Clematis ligusticifolia Nutt.
- Canpa (Lakota) 1918?-1970? (121)
- Prunus virginiana L.
- Cante jazanpi icuwa (Lakota, heart pain treatment) 1918?-1970? (121)
- Astragalus L.
- Canxlogan hu ptepte cela (Lakota, short buffalo-weed) 1918?-1970? (121)
- Erigeron pumilus Nutt.
- Canxlogan makatola (Lakota, green earth weed) 1918-1970 (121)
- Fritillaria atropurpurea Nutt.
- Canxlogan panpanla (Lakota, soft weed) 1918-1970 (121)
- Tradescantia ohiensis Raf.
- Canxlo gan škiškita (Lakota, rough weed) 1918?-1970? (121)
- Solanum triflorum Nutt.
- Canxlogan wakaljapi (Lakota, boiling weed) 1918?-1970? (121)
- Coreopsis tinctoria Nutt.
- Canxlogan wapoštan (Lakota, hat weed) 1918?-1970? (121)
- Chamaesyce geyeri (Engelm.) Small var. geyeri [reported as: Euphorbia geyeri Engelm.]
- Canxlogan waštemna (Lakota, odorous weed)
- 1918?-1970? (121)
- Ambrosia artemisiifolia L. [reported as: Ambrosia artemisaefolia L.]
- 1918?-1970? (121)
- Artemisia campestris L.
- Canzi (Lakota, yellow wood) 1918?-1970? (121)
- Rhus glabra L.
- Cape Cod waterlily [Capecod waterlily] 1923-1942 (138, 155)
- Nymphaea odorata Aiton ssp. odorata
[also reported as: Nymphaea odorata Aiton var. rosea Pursh, Nymphaea odorata rosea]
- Cape gooseberry
- 1876 (92)
- Physalis alkekengi L.
- 1913 (5)
- Physalis heterophylla Nees
- 1923 (156)
- Physalis pubescens L.
- Capers 1896-1929 (5, 76, 157, 158) Berwick ME
- Caltha palustris L.
- Capil Veneris 1828 (7)
- Adiantum pedatum L.
- Capillaire de Montpelier (French) 1937 (97) OK
- Adiantum capillus-veneris L.
- Capillaire du Canada (French) 1828 (7, 158)
- Adiantum pedatum L.
- Capillary beak-rush [Capillary beaked rush] 1913 (5)
- Rhynchospora capillacea Torr.
- Capillary eragrostis 1901-1907 (56, 72) IA
- Eragrostis capillaris (L.) Nees
- Capillary panic grass [Capillary panic-grass] 1852-1936 (143) Quebec
- Panicum capillare L.
- Capitate croton 1913-1937 (5, 97) OK
- Croton capitatus Michx.
- Capitate spike-rush [Capitate spike rush] 1913 (5)
- Eleocharis geniculata (L.) Roemer & J.A. Schultes [reported as: Eleocharis capitata (L.) R.Br. (Eleocharis caribaea (Rottb.) S.F. Blake)]
- Capon's tail grass 1876-1913 (5, 92)
- Vulpia myuros (L.) K.C. Gmel. [also reported as: Festuca myuros L.]
- Capsella
- Present (50)
- Capsella Medik.
- 1919 (52)
- Capsella bursa-pastoris (L.) Medik.
- Capuli (Mexico) 1919 (107)
- Prunus serotina Ehrh.
- Capulinos (Mexico) 1919 (107)
- Prunus serotina Ehrh.
- Caragana 1930-1937 (106, 112) Neb
- Caragana arborescens Lam.
- Caraway
- 1828 (7)
- Arnoglossum Raf. [reported as: Cacalia L. (GP species)]
- 1840-Present (1, 3, 4, 5, 19, 50, 53, 55, 57, 58, 59, 63, 72, 80, 85, 107, 109, 131, 138, 155, 156, 158) IA SD
- Carum carvi L. [also reported as: Carum carui L.]
- Caraway seed 1876 (92)
- Carum carvi L.
- Carberry [Car-berry] 1913-1923 (5, 156)
- Ribes uva-crispa L. var. sativum DC. [also reported as: Grossularia reclinata (L.) P. Mill. Ribes grossularia L.]
- Card teasel [Card-teasel] 1900-1937 (5, 122, 124, 156, 158) TX
- Dipsacus fullonum L. [also reported as: Dipsacus sylvestris Huds.]
- Card thistle 1913-1923 (5, 156)
- Dipsacus fullonum L. [also reported as: Dipsacus sylvestris Huds.]
- Cardamine coreopsis 1942 (155)
- Coreopsis tinctoria Nutt. var. tinctoria [reported as: Coreopsis cardaminaefolia (DC.) Torr. & Gray]
- Cardiacke 1900 (158) verbal corruption
- Alliaria petiolata (Bieb.) Cavara & Grande [reported as: Alliaria alliaria (L.) Britton]
- Cardiaire (French) 1900 (158)
- Leonurus cardiaca L.
- Cardinal-flower [Cardinal flower, Cardinalflower, Cardinal's flower] 1834-Present (1, 3, 4, 6, 5, 7, 19, 34, 37, 44, 46, 48, 50, 63, 72, 82, 92, 95, 97, 109, 122, 124, 125, 138, 148, 155, 157, 158)
- Lobelia cardinalis L. [also reported as: Lobelia splendens Willd.]
- Carduus stellatus luteus foliis cyani 1694 (46) Tournefort
- Centaurea solstitialis L.
- Carduus tomentosus acanthi folio vulgaris 1694 (46) Tournefort
- Onopordum acanthium L.
- Careless 1900-1929 (5, 156, 157, 158)
- Amaranthus hybridus L.
- Carelessweed [Careless weed, Careless-weed]
- 1930 (106)
- Amaranthus L.
- Present (50)
- Amaranthus palmeri S. Wats.
- 1937 (122) TX
- Amaranthus retroflexus L.
- 1932 (1)
- Iva L. [reported as: Cyclachaena Fresen.]
- 1923 (156)
- Iva xanthifolia Nutt.
- Cariophyllus barbatus sylvestris 1694 (46) Tournefort
- Dianthus armeria L.
- Carleton's four-o'clock [Carleton four-o'clock] 1986 (4)
- Mirabilis glabra (S. Wats.) Standl.
- Carleton's umbrella-wort [Carleton's umbrella wort] 1913-1937 (5, 97) OK
- Mirabilis glabra (S. Wats.) Standl. [also reported as: Alliona carletoni Standley]
- Carnation 1828-1942 (1, 7, 15, 138, 155, 156, 158)
- Dianthus L.
- Carnation clover [Carnation-clover] 1900-1936 (5, 93, 156, 158)
- Trifolium incarnatum L.
- Carolina anemone 1878-Present (3, 4, 5, 50, 72, 85, 86, 93, 97, 131, 155) Book name
- Anemone caroliniana Walt.
- Carolina azolla 1907 (5, 72) IA
- Azolla caroliniana Willd.
- Carolina canary grass [Carolina canary-grass, Carolina canarygrass] 1913-Present (5, 50, 119, 155)
- Phalaris caroliniana Walt.
- Carolina cedar 18761929 (5, 92, 157, 158)
- Juniperus virginiana L.
- Carolina clover 1895 (2, 3, 4, 5, 50, 97, 122, 155)
- Trifolium carolinianum Michx.
- Carolina cocculus 1895 (2, 4)
- Cocculus carolinus (L.) DC.
- Carolina coralseed Present (50)
- Cocculus carolinus (L.) DC.
- Carolina cottonwood 1923 (138)
- Populus deltoides Bartr. ex Marsh. ssp. deltoides [reported as: Populus angulata]
- Carolina crabgrass
- Present (50)
- Digitaria cognata (J.A. Schultes) Pilger
- Present (50)
- Digitaria cognata (J.A. Schultes) Pilger var. cognata
- Carolina cranebill [Carolina cranesbill, Carolina crane-bill, Carolina crane's bill, Carolina crane's-bill 1899-1986 (4, 3, 5, 72, 85, 97, 131, 157)
- Geranium carolinianum L.
- Carolina desert-chicory Present (50)
- Pyrrhopappus carolinianus (Walt.) DC.
- Carolina draba Present (50)
- Draba reptans (Lam.) Fern.
- Carolina elephant-foot [Carolina elephant foot, Carolina elephantfoot, Carolina elephantsfoot, Carolina elephant's foot, Carolina elephant's-foot)] 1913-Present (5, 50, 97, 122, 124, 156)
- Elephantopus carolinianus Willd.
- Carolina fanwort Present (50)
- Cabomba caroliniana Gray
- Carolina fimbry Present (50)
- Fimbristylis caroliniana (Lam.) Fern.
- Carolina foxtail 1942-Present (3, 50, 155)
- Alopecurus carolinianus Walt.
- Carolina geranium
- 1900-Present (50, 155, 157)
- Geranium carolinianum L.
- Present (50)
- Geranium carolinianum L. var. carolinianum
- Present (50)
- Geranium carolinianum L. var. sphaerospermum (Fern.) Breitung
- Carolina gromwell 1923-1942 (138, 155)
- Lithospermum caroliniense (Walt. ex J.F. Gmel.) MacM. [also reported as: Lithospermum carolinense (Walt.) MacM.]
- Carolina horse-nettle [Carolina horsenettle, Carolina horse nettle]
- 1986-Present (4, 50)
- Solanum carolinense L.
- Present (50)
- Solanum carolinense L. var. carolinense
- Carolina joint-tail [Carolina jointtail] 1942 (155)
- Coelorachis cylindrica (Michx.) Nash [reported as: Manisuris cylindrica (Michx.) O. Ktze.]
- Carolina larkspur
- 1899-Present (5, 50, 97, 131, 133, 155, 158)
- Delphinium carolinianum Walt.
- Present (50)
- Delphinium carolinianum Walt. ssp. virescens (Nutt.) Brooks
- Carolina leaf-flower Present (50)
- Phyllanthus carolinensis Walt.
- Carolina love grass [Carolina lovegrass] 1942-1977 (3, 155)
- Eragrostis pectinacea (Michx.) Nees ex Steud.
- Carolina milkvetch [Carolina milk vetch] 1899-1937 (5, 93, 97, 131) Neb OK SD
- Astragalus canadensis L. var. canadensis [also reported as: Astragalus carolinianus L.]
- Carolina moonseed [Carolinian moonseed] 1785-1949 (5, 8, 97, 109)
- Cocculus carolinus (L.) DC. [also reported as: Epibaterium carolinum (L.) Britton, Menispermum carolinum]
- Carolina mosquito-fern [Carolina mosquitofern] Present (50)
- Azolla caroliniana Willd.
- Carolina nut-sedge [Carolina nutsedge] Present (50)
- Scleria pauciflora Muhl. ex Willd. var. caroliniana (Willd.) Wood
- Carolina phyllanthus 1913-1937 (5, 97) OK
- Phyllanthus carolinensis Walt.
- Carolina pine 1913 (5)
- Pinus echinata P. Mill.
- Carolina poplar [Carolinian poplar]
- 1910-Present (50, 4, 82, 109, 135, 155)
- Populus Χcanadensis Moench [deltoides Χ nigra] [also reported as: Populus canadensis Moench, Populus deltoides var. carolinensis, Populus canadensis Moench var. eugenei (Simon-Louis) Schelle]
- 1876-1932 (5, 85, 92, 156)
- Populus balsamifera L.
- 1900-1923 (5, 156, 158)
- Populus deltoides Bartr. ex Marsh.
- 1857-1937 (20, 112)
- Populus deltoides Bartr. ex Marsh. ssp. deltoides [also reported as: Populus angulata Aiton]
- 1895 (2)
- Populus deltoides Bartr. ex Marsh. ssp. monilifera (Aiton) Eckenwalder [reported as: Populus monilifera Aiton]
- Carolina prickly-leaf smilax [Carolinian prickly leaved smilax] 1785 (8)
- Smilax bona-nox L.
- Carolina puccoon
- Present (50)
- Lithospermum caroliniense (Walt. ex J.F. Gmel.) MacM.
- Present (50)
- Lithospermum caroliniense (Walt. ex J.F. Gmel.) MacM. var. croceum (Fern.) Cronq.
- Carolina rose
- 1923-Present (50, 155, 156)
- Rosa carolina L.
- Present (50)
- Rosa carolina L. var. carolina
- Carolina shrub-trefoil 1785 (8)
- Ptelea trifoliata L.
- Carolina snailseed 1923-1942 (138, 155)
- Cocculus carolinus (L.) DC.
- Carolina watershield [Carolina water shield, Carolina water-shield] 1913-1923? (5, 156)
- Cabomba caroliniana Gray
- Carolina whitlow grass [Carolina whitlow-grass] 1907-1937 (5, 72, 97, 131)
- Draba reptans (Lam.) Fern. [also reported as: Draba caroliniana Walt.]
- Carolina willow 1977-1986 (3, 4)
- Salix caroliniana Michx.
- Carolina woolly-white [Carolina woollywhite]
- Present (50)
- Hymenopappus scabiosaeus L'Hιr.
- Present (50)
- Hymenopappus scabiosaeus L'Her. var. corymbosus (Torr. & Gray) B.L. Turner
- Present (50)
- Hymenopappus scabiosaeus L'Hιr. var. scabiosaeus
- Carolinian ash 1785 (8)
- Fraxinus americana L.
- Carolinian shrubby callicarpa 1785 (8)
- Callicarpa americana L.
- Carota 1917 (57)
- Daucus carota L.
- Carotte (French) 1900 (158)
- Daucus carota L.
- Carpenter's-grass [Carpenter's grass] 1900-1904 (69, 158)
- Achillea millefolium L.
- Carpenter's herb [Carpenters' herb, Carpenter's-herb]
- 1876-1900 (92, 157, 158)
- Lycopus virginicus L.
- 1900-1929 (5, 156, 157, 158)
- Prunella vulgaris L.
- Carpenter's square [Carpenter's-square]
- 1923 (156)
- Prunella vulgaris L.
- 1876-Present (5, 48, 50, 92, 156) misapplied
- Scrophularia marilandica L. [also reported as: Scrophularia marylandica L.]
- Carpenter's-weed [Carpenter's weed, Carpenter-weed, Carpenter-weed] 1891-1932 (1, 5, 73, 79, 80, 106)
- Prunella vulgaris L.
- Carpet bent 1923 (138)
- Agrostis stolonifera L.
- Carpet phlox Present (50)
- Phlox hoodii Richards. ssp. glabrata (E. Nels.) Wherry
- Carpet-grass [Carpet grass] 1930 (106)
- Phyla nodiflora (L.) Greene [reported as: Lippia repens , Lippia nodiflora (L.) Michx.)]
- Carpetweed [Carpet-weed, Carpet-weed]
- 1932 (1)
- Chamaesyce S.F. Gray
- 1932 (85) SD
- Chamaesyce geyeri (Engelm.) Small
- 1849-Present (1, 13, 50, 93, 155, 158)
- Mollugo L.
- 1840-1986 (4, 5, 15, 19, 62, 63, 72, 85, 92, 93, 97, 122, 145, 155, 156, 158)
- Mollugo verticillata L.
- 1937 (124) TX
- Phyla lanceolata (Michx.) Greene [reported as: Lippia lanceolata Michx. var. recognita Fern. & Grisc.]
- 1937 (124) TX
- Phyla nodiflora (L.) Greene [reported as: Lippia nodiflora (L.) Michx.]
- Carpousia or carpousea (Modern Greek) 1886 (110)
- Citrullus lanatus (Thunb.) Matsumura & Nakai [reported as: Citrullus vulgaris Schrad]
- Carrion flower [Carrion-flower]
- 1876 (92)
- Glechoma hederacea L. [reported as: Nepeta glechoma Benth.]
- 1932 (1)
- Smilax L. [reported as: Nemexia Raf.]
- 1923 (156)
- Smilax ecirrata (Engelm. ex Kunth) S. Wats.
- 1900-1977 (3, 72, 85, 97, 109, 156, 157, 158)
- Smilax herbacea L.
- 1977 (3)
- Smilax herbacea L. var. herbacea
- 1977 (3)
- Smilax lasioneura Hook. [reported as: Smilax herbacea L. var. lasioneuron (Small) Rydb.]
- 1977 (3)
- Smilax pulverulenta Michx. [reported as: Smilax herbacea L. var. pulverulenta (Michx.) Gray]
- Carrion-flower greenbrier [Carrionflower greenbrier] 1942 (155)
- Smilax herbacea L.
- Carriuela 1894 (150) NM
- Ipomoea purpurea (L.) Roth
- Carrizo [Carizzo, Carizo]
- 1938 (119) OK
- Calamovilfa gigantea (Nutt.) Scribn., & Merr.
- 1913 (5)
- Calamovilfa longifolia (Hook.) Scribn.
- 1912 (152) NM
- Phragmites Adans.
- 1904-1912 (149, 152) NM
- Phragmites australis (Cav.) Trin. ex Steud. [also reported as: Phragmites phragmites (L.) Karst.]
- Carrot
- 1818-1986 (1, 4, 10, 138, 155, 156, 158)
- Daucus L.[also reported as: Daucus (Tourn.) L.]
- 1912-1930 (62, 106, 107)
- Daucus carota L.
- Carrot-leaf parsley [Carrot-leaved parsley] 1913-1937 (5, 93, 97, 122)
- Lomatium foeniculaceum (Nutt.) Coult. & Rose ssp. daucifolium (Torr. & Gray) Theobald[also reported as: Cogswellia daucifolia (Nutt.) M.E. Jones]
- Carrotweed [Carrot weed, Carrot-weed]
- 1892-1923? (6, 156, 158) obsolete by 1923
- Ambrosia artemisiifolia L. [also reported as: Ambrosia artemisaefolia L.]
- 1828-1913 (5, 7, 92)
- Ambrosia artemisiifolia L. var. elatior (L.) Descourtils [also reported as: Ambrosia elatior L.]
- Carruth's sagebrush [Carruth sagebrush] 1942 (155)
- Artemisia carruthii Wood ex Carruth.
- Carruth's sagewort Present (50)
- Artemisia carruthii Wood ex Carruth.
- Carson's water-parsnip [Carson's water parsnip, Carson's waterparsnip] 1913-Present (5, 50)
- Sium carsonii Dur. ex Gray [also reported as: Sium carsoni Durand]
- Carsous 1900 (158)
- Rorippa nasturtium-aquaticum (L.) Hayek [reported as: Nasturtium officinale R.Br., Rorippa nasturtium (L.) Rusby]
- Cartamo (Spanish) 1900 (158)
- Carthamus tinctorius L.
- Carthame (French) 1900 (158)
- Carthamus tinctorius L.
- Carthamine 1886 (110)
- Carthamus tinctorius L.
- Cart-track plant 1919-1923 (107, 156)
- Plantago major L.
- Carum
- Present (50)
- Carum L.
- 1917 (57)
- Carum carvi L.
- Carvell 1629 (46) Higgeson
- Osmorhiza longistylis (Torr.) DC.
- Carvies 1900-1923 (5, 156, 158)
- Carum carvi L.
- Caseweed [Case weed, Case-weed] 1900-1923 (5, 156, 157, 158)
- Capsella bursa-pastoris (L.) Medik. [also reported as: Bursa bursa-pastoris (L.) Britton]
- Cashes 1898 (5, 69, 71, 156, 158)
- Conium maculatum L.
- Cassabully 1929 (157)
- Barbarea vulgaris Aiton f. [reported as: Barbarea barbarea (L.) MacM., Campe barbarea (L.) W. Wight ex Piper]
- Casse Diable (French) 1900 (158)
- Hypericum perforatum L.
- Casse-lunette (French) 1900 (158)
- Centaurea cyanus L.
- Casse-weed 1900-1929 (157, 158)
- Capsella bursa-pastoris (L.) Medik. [also reported as: Bursa bursa-pastoris (L.) Britton]
- Cassia
- 1840 (19)
- Chamaecrista fasciculata (Michx.) Greene var. fasciculata [reported as: Cassia chamaecrista L.]
- 1929 (157)
- Senna marilandica (L.) Link [reported as: Cassia marilandica L.]
- Cassia lignea 1879 (46)
- Senna marilandica (L.) Link [reported as: Cassia marilandica L.]
- Cassia
floribus parvis nictitantibus 1696 (86) Plukenet
- Chamaecrista nictitans (L.) Moench ssp. nictitans var. nictitans [reported as: Cassia nictitans L.]
- Cassida palustris vulgatior flore caeruleo 1694 (46) Tournefort
- Scutellaria galericulata L.
- Castanea equina 1768 (165) used as food for horses & resembles chestnut
- Aesculus L.
- Cat brier [Cat briar, Cat-brier] 1908 (117, 156) TX
- Smilax bona-nox L.
- Cat foot 1892 (6)
- Pseudognaphalium obtusifolium (L.) Hilliard & Burtt ssp. obtusifolium [reported as: Gnaphalium polycephalum Michx., Gnaphalium obtusifolium L.]
- Cat grass [Catgrass] 1828 (7)
- Pennisetum glaucum (L.) R. Br. [reported as: Panicum glaucum L.]
- Cat greenbrier 1942-Present (50, 155)
- Smilax glauca Walt.
- Cat pine 1894-1913 (5, 75, 158) Buckfield ME
- Picea glauca (Moench) Voss [also reported as: Picea alba Link., Picea canadensis (Mill.) B.S.P.]
- Cat spruce 1900-1913 (5, 158)
- Picea glauca (Moench) Voss [also reported as: Picea canadensis (Mill.) B.S.P.]
- Cataire (French) 1900 (158)
- Nepeta cataria L.
- Catalpa or Catalpa tree
- 1818-Present (1, 10, 26, 50, 82, 138, 155, 158)
- Catalpa Scop. [also reported as: Catalpa Jussieu]
- 1785-1882 (8, 14, 20, 92)
- Catalpa ovata G. Don [also reported as: Catalpa syringaefolia [Bunge], Catalpa bungei ]
- 1894 (3, 82, 106, 114, 156)
- Catalpa speciosa (Warder) Warder ex Engelm.
- Catalpa (French) 1785-1857 (8, 20)
- Catalpa ovata G. Don[also reported as: Bignonia catalpa ]
- Catalpa willow 1898 (77) TX
- Chilopsis linearis (Cav.) Sweet [reported as: Chilopsis saligna Don.]
- Cataria 1917 (57)
- Nepeta cataria L.
- Catawba tree
- 1857-1876 (20, 92) Georgia & Carolinas for local Indian tribe
- Catalpa ovata G. Don [also reported as: Bignonia catalpa]
- 1899-1986 (4, 5, 63, 82, 158)
- Catalpa speciosa (Warder) Warder ex Engelm.
- Catbrier [Cat brier] 1876-1936 (1, 92, 93) Neb
- Smilax L.
- Catchfly [Catch fly]
- 1900 (158)
- Antirrhinum majus L.
- 1828-1900 (6, 7, 92, 157, 158) misapplied
- Apocynum androsaemifolium L.
- 1814-Present (1, 4, 10, 13, 15, 50, 93, 109, 138, 156, 158, 167) insects often caught in sticky exudate
- Silene L.
- 1913 (80) IA
- Silene dichotoma Ehrh.
- Catchfly gentian 1986 (4)
- Eustoma Salisb. ex G. Don
- Catch-fly grass [Catchfly grass, Catch-fly-grass, Catch fly grass, Catchflygrass] 1840-1977 (50, 3, 5, 19, 45, 56, 66, 94, 122, 155, 163)
- Leersia lenticularis Michx. [also reported as: Homalocenchrus lenticularis (Michx.) Scribn.]
- Catchfly prairie gentian Present (50)
- Eustoma exaltatum (L.) Salisb. ex G. Don
- Catchweed [Catch weed, Catch-weed]
- 1932 (1)
- Asperugo L. [reported as: Asperugo (Tourn.) L.]
- 1900-1923 (5, 156, 158)
- Asperugo procumbens L.
- 1840-1923 (5, 19, 49, 53, 92, 107, 156, 158)
- Galium aparine L.
- Catchweed bedstraw 1942-1986 (3, 4, 155)
- Galium aparine L.
- Catclaw sensitive brier 1986 (4)
- Mimosa nuttallii (DC.) B.L. Turner [reported as: Schrankia nuttallii (DC.) Standl.]
- Caterpillars
- 1900-1923 (156, 158)
- Myosotis scorpioides L. [also reported as: Myosotis palustris (L.) Hill]
- Present (50)
- Phacelia congesta Hook.
- Cat-foot poplar [Cat foot poplar] 1900-1923 (5, 156, 158)
- Populus nigra L.
- Catgut [Cat gut, Cat-gut]
- 1828 (7)
- Tephrosia Pers.
- 1886-1986 (2, 4, 5, 49, 63, 92, 102, 156, 158) from long wiry roots
- Tephrosia virginiana (L.) Pers. [also reported as: Cracca virginiana L.]
- Catgut weed [Cat-gut weed] 1929 (157)
- Tephrosia virginiana (L.) Pers. [reported as: Cracca virginiana L.]
- Cathartic buckthorn 1857 (20)
- Rhamnus cathartica L. [reported as: Rhamnus catharticus L.]
- Cathay rose 1923 (138)
- Rosa multiflora Thunb. ex Murray [reported as: Rosa multiflora cathayensis , Rosa cathayensis (Rehd. & Wilson) Bailey, Rosa multiflora var. cathayensis Rehder & E.H. Wilson]
- Cat-in-clover 1900 (158)
- Lotus corniculatus L.
- Cat-mint [Cat mint, Catmint]
- 1923 (156)
- Agastache nepetoides (L.) Kuntze
- 1814 (167)
- Nepeta L.
- 1671-1949 (1, 5, 7, 10, 19, 46, 49, 53, 62, 63, 69, 85, 92, 93, 95, 109, 156, 157) Josselyn
- Nepeta cataria L.
- Catnep
- 1900 (158)
- Nepeta L.
- 1898-1949 (5, 49, 53, 63, 109, 157, 158)
- Nepeta cataria L.
- Catnep giant-hyssop 1913 (5)
- Agastache nepetoides (L.) Kuntze
- Catnep tragia 1913-1937 (5, 97) OK
- Tragia betonicifolia Nutt. [also reported as: Tragia nepetaefolia Cavar.]
- Catnip
- 1899 (131) SD
- Agastache nepetoides (L.) Kuntze
- 1923-Present (50, 82, 156)
- Nepeta L.
- 1852-Present (1, 3, 4, 7, 19, 37, 40, 47, 48, 49, 50, 53, 57, 61, 62, 69, 72, 80, 82, 85, 92, 93, 95, 97, 106, 107, 109, 114, 131, 138, 145, 155, 156, 157, 158)
- Nepeta cataria L.
- Catnip giant hyssop [Catnip gianthyssop] 1907-1986 (3, 4, 72, 93, 97, 155)
- Agastache nepetoides (L.) Kuntze
- Cat-o'-nine-tails 1900-1923 (5, 92, 156, 158)
- Typha latifolia L.
- Cat-pea [Cat-peas, Cat pea] 1900-1923 (5, 156, 158)
- Vicia cracca L.
- Cat-posy 1900 (158) archaic
- Bellis perennis L.
- Catrup 1900 (158)
- Nepeta cataria L.
- Cat's heal-all 1923 (156)
- Nepeta cataria L.
- Cat's-claw [Cats claw, Catsclaw, Cat-claw, Catclaw]
- 1930 (106)
- Acacia P. Mill.
- 1913?-1986 (4, 153) NM
- Mimosa L.
- 1937 (124) TX
- Mimosa aculeaticarpa Ortega var. biuncifera (Benth.) Barneby [reported as: Mimosa biuncifera Benth.]
- 1937 (97) OK
- Mimosa borealis Gray
- Catsclaw mimosa [Catclaw mimosa] 1942-Present (4, 50, 155)
- Mimosa aculeaticarpa Ortega var. biuncifera (Benth.) Barneby [also reported as: Mimosa biuncifera Benth.]
- Cat's-clover [Cat's clover, Cat-clover] 1913-1923 (5, 156)
- Lotus corniculatus L.
- Cat's-cradles [Cat's cradles] 1913-1923? (5, 156) obsolete by 1923
- Plantago lanceolata L.
- Cat's-ear [Cat's ear] 1913-1923 (5, 156)
- Hieracium gronovii L.
- Cat's-faces 1900 (158)
- Viola tricolor L.
- Cat's-foot [Cat's foot, Cat foot, Cats foot]
- 1933 (127) ND
- Antennaria Gaertner
- 1898-1923? (64, 92, 156, 158)
- Asarum canadense L.
- 1876-1929 (5, 49, 92, 157, 158)
- Glechoma hederacea L. [also reported as: Nepeta glechoma Benth.]
- Cat's-milk [Cats milk, Cat's milk)] 1876-1923? (5, 92, 156) obsolete by 1923
- Euphorbia helioscopia L. [also reported as: Tithymalus helioscopia (L.) Hill.]
- Cat's-paws [Cat's paws]
- 1926-1932 (1, 98) Neb
- Antennaria Gaertner
- 1900-1929 (157, 158)
- Glechoma hederacea L.
- Cat's-tail [Cat's tail, Cat's-tails, Cat's tails, Cats tails]
- 1913-1923? (5, 156) obsolete by 1923
- Echium vulgare L.
- 1900 (158)
- Elodea canadensis Michx. [reported as: Philotria canadensis (Michx.) Britt.]
- 1900-1929 (5, 157, 158)
- Equisetum arvense L.
- 1900-1923 (5, 156, 158)
- Hippuris vulgaris L.
- Cat's-tail [Cat's tail] or Cat's-tail grass [Cat's tail grass, Cats-tail grass]
- 1901 (56)
- Pennisetum glaucum (L.) R. Br. [reported as: Pennisetum typhoideum Rich.]
- 1818-1903 (10, 66)
- Phleum L.
- 1840-1876 (19, 92, 108)
- Phleum pratense L.
- Cat's-wort [Cats wort, Cat's wort] 1876-1904 (69, 92, 157, 158)
- Nepeta cataria L.
- Cat-tail [Cat tail, Cattail, Cat's tail]
- 1818-Present (1, 10, 14, 50, 93, 138, 148, 155)
- Typha L. [also reported as: Typha (Tourn.) L.]
- 1671-1970 (21, 46, 49, 85, 101, 107, 121) Josselyn
- Typha latifolia L.
- Cat-tail flag [Cat's-tail flag, Cattail flag] 1814-1932 (1, 7, 158, 167)
- Typha L. [also reported as: Typha (Tourn.) L.]
- 1770-1928 (5, 19, 40, 41, 49, 92, 101, 156, 157, 158) Meriwether Lewis 35
- Typha latifolia L.
- Cat-tail gayfeather [Cattail gayfeather] 1923 (138)
- Liatris pycnostachya Michx.
- Cat-tail millet [Cattailmillet, Cat-tails millet]
- 1884-1942 (45, 46, 87, 151, 155)
- Pennisetum glaucum (L.) R. Br. [also reported as: Penicillaria spicata [Willd.], Pennisetum typhoideum Rich.]
- 1896-1913 (5, 45)
- Setaria italica (L.) Beauv. [also reported as: Chaetochloa italica (L.) Scribn.]
- Cat-tail reed [Cattail reed] 1937 (122) TX
- Typha L.
- Cat-tail sedge 1913-Present (5, 50)
- Carex typhina Michx.
- Cat-whistle [Cat whistle, Cat-whistles] 1900-1913 (5, 158)
- Equisetum palustre L.
- Caucasian bluestem 1977-Present (3, 50)
- Bothriochloa bladhii (Retz.) S.T. Blake [also reported as: Andropogon intermedius R. Br.]
- Caucasian yellow mustard 1949 (109)
- Sinapis alba L. [reported as: Brassica hirta Moench]
- Cauda caballina 1879? (46)
- Equisetum hyemale L.
- Cauliflower 1919 (107)
- Brassica L.
- Caulophyllum 1905-1917 (52, 54, 57, 64)
- Caulophyllum thalictroides (L.) Michx.
- Caulophyllum radix 1828 (7)
- Caulophyllum thalictroides (L.) Michx.
- Causeway grass 1913 (5)
- Poa annua L.
- Cauwoord (Belgium) (gourd) 1586 (107 ) Lyte
- Cucurbita pepo L.
- Céanote 1785 (8)
- Ceanothus L.
- Céanote dAmérique (French) 1785 (8)
- Ceanothus americanus L.
- Céanothe (French) 1900 (158)
- Ceanothus americanus L.
- Ceanothus
- 1923-Present (50, 138, 155)
- Ceanothus L.
- 1905-1917 (52, 54, 57)
- Ceanothus americanus L.
- Cedar or Cedar tree
- 1814-1970 (46, 121, 148, 167)
- Juniperus L.
- 1913 (153) NM
- Juniperus monosperma (Engelm.) Sarg.[reported as: Sabina monosperma (Engelm.) Rydb.]
- 1830-1931 (37, 39, 65) William Clark spells ceeder
- Juniperus virginiana L.
- Cedar-apple [Cedar apple]
- 1876 (92) excrecenses, possibly galls, or cedar apple rust
- Juniperus virginiana L., excrecenses, possibly galls, or cedar apple rust
- 1850 (100) TX, the fruit
- Yucca filamentosa L.
- Cedar-moss [Cedar moss] 1923 (156)
- Ceratophyllum demersum L.
- Cédre de Virginie (French) 1892 (6)
- Juniperus virginiana L.
- Cédre rouge (French) 1770 (41)
- Juniperus virginiana L.
- Cedro 1913 (153) NM
- Juniperus scopulorum Sarg. [reported as: Sabina scopulorum (Sarg.) Rydb.]
- Cedrus 1879 (46)
- Juniperus virginiana L.
- Cejaka or šejaka (Lakota, mint) 1918?-1970? (121)
- Mentha arvensis L.
- Cekela or zekhalea (Basque) 1886 (110)
- Secale cereale L.
- Celandine
- 1814-Present (1, 15, 50, 57, 109, 155, 156, 158, 167)
- Chelidonium majus L. var. majus [also reported as: Chelidonium (Tourn.) L.]
- 1671-Present (5, 7, 10, 19, 46, 49, 50, 53, 54, 82, 92, 156, 158)
- Chelidonium majus L. var. majus
- Present (50)
- Chelidonium majus L.
- 1828 (7)
- Impatiens L.
- 1893 (74, 76) Buckfield ME; Ferrisburgh VT; Paris ME
- Impatiens capensis Meerb. [also reported as: Impatiens fulva Nutt.]
- Celaster (German) 1900 (158)
- Celastrus scandens L.
- Celastre (French)
- 1785 (8)
- Celastrus L.
- 1900 (158)
- Celastrus scandens L.
- Celery crowfoot 1840 (19)
- Ranunculus sceleratus L.
- Celery-grass 1923 (156)
- Possibly,Vallisneria americana Michx. [reported as: Vallisneria spiralis L.]
- Celery-leaf crowfoot [Celery-leaved crowfoot] 1892-1936 (5, 6, 93, 97, 125, 131, 158
- Ranunculus sceleratus L.
- Celery-seed [Celery seed] 1900-1923 (5, 156, 157, 158) misapplied
- Rumex obtusifolius L.
- Celestial 1937 (124) TX
- Nemastylis geminiflora Nutt. [reported as: Nemastylis acuta (Bart.) Herb.]
- Celidonia mayor (Spanish) 1900 (158)
- Chelidonium majus L.
- Cembra pine Present (50)
- Pinus L. [also reported as: Apinus Necker.]
- Cementer-of-Friendship [Cementer of Friendship] (India) 1892 (6)
- Cannabis sativa L.
- Cenizo 1900-1913 (5, 158)
- Atriplex canescens (Pursh) Nutt.
- Centaurea 1923-1942 (138, 155)
- Centaurea L.
- Centaurée americaine (French) 1900 (158)
- Sabatia angularis (L.) Pursh
- Centaurée anguleuse (French) 1828 (7)
- Sabatia angularis (L.) Pursh
- Centaurium 1942 (155)
- Centaurium Hill
- Centaury
- 1986 (4)
- Centaurea L.
- 1923-Present (1, 50, 82, 93, 109, 156)
- Centaurium Hill
- Centeno (French) 1900 (158)
- Secale cereale L.
- Centinode 1900 (158)
- Polygonum aviculare L.
- Cepa 1768 (165) Tournefort
- Allium L.
- Céphalante (French) 1785 (8)
- Cephalanthus L.
- Céphalante d'Occident (French) 1785 (8)
- Cephalanthus occidentalis L.
- Cephalanthe d'Amerique (French) 1828-1932 (6, 7)
- Cephalanthus occidentalis L.
- Cephalanthus Cortex 1828 (7)
- Cephalanthus occidentalis L.
- Cerastium 1923-1942 (138, 155)
- Cerastium L.
- Cereal rye Present (50)
- Secale cereale L.
- Cerfeuil sauvage (French Cananadian) 1770 (41)
- Cryptotaenia canadensis (L.) DC. [reported as: Sison canadense]
- Cerise de Virginie (French) 1820 (89)
- Possibly, Prunus virginiana L. [reported as: Prunus padus virginiana]
- Cerisier a grappe (French) 1820 (89)
- Possibly,Prunus virginiana L. [reported as: Prunus padus virginiana]
- Cerisier de Virginie (French) 1900 (158)
- Prunus serotina Ehrh.
- Ceroline
1900-1929 (157, 158)
- Impatiens capensis Meerb. [also reported as: Impatiens biflora Walt.]
- 1929 (157)
- Impatiens pallida Nutt.
- Certinensis poplar 1910 (135) MT
- Populus balsamifera L. [reported as: Populus laurifolia]
- Cerulean indigobush amorpha 1942 (155)
- Amorpha fruticosa L. [reported as: Amorpha fruticosa coerulea]
- Cesan (Illyria) 1886 (110)
- Allium sativum L.
- Cešlošlo pezuta (Lakota, diarrhea medicine) 1918?-1970? (121)
- Asclepias pumila (Gray) Vail
- Chadlock 1913-1929 (5, 157)
- Sinapis arvensis L.
- Chaetopappa
- 1900 (158)
- Chaetopappa DC.
- 1913-1937 (5, 97) OK
- Chaetopappa asteroides (Nutt.) DC.
- Chafeweed [Chafe weed, Chafe-weed] 1876-1923 (5, 92, 156)
- Pseudognaphalium obtusifolium (L.) Hilliard & Burtt ssp. obtusifolium [also reported as: Gnaphalium polycephalum Michx., Gnaphalium obtusifolium L.]
- Chaffweed [Chaff weed]
- 1818-1932 (1, 10, 156)
- Anagallis L. [also reported as: Centunculus L.]
- 1899-Present (4, 5, 50, 85, 92, 93, 131, 156)
- Anagallis minima (L.) Krause [also reported as: Centenculus minimus L., Centunculus minimus L.]
- Chaha san (Dakota Teton, pale bark) 1919 (37)
- Betula papyrifera Marsh.
- Chair-bottom rush 1903 (66)
- Schoenoplectus pungens (Vahl) Palla var. pungens [reported as: Scirpus pungens Vahl]
- Chairmaker's bulrush [Chair-maker's rush] 1923-Present (50, 3, 156)
- Schoenoplectus americanus (Pers.) Volk. ex Schinz & R. Keller [also reported as: Scirpus americanus Pers.]
- Chairmaker's rush [Chair-makers rush] 1894 (129) SD
- Schoenoplectus pungens (Vahl) Palla var. pungens [reported as: Scirpus pungens Vahl]
- Chak (Winnebago) 1919 (37)
- Juglans nigra L.
- Chakida-kahtsu (Pawnee) 1806-1830 (37, 35) William Clark
- Yucca glauca Nutt.
- Chalk Hill hymenopappus Present (50)
- Hymenopappus tenuifolius Pursh
- Chalk plant [Chalk-plant] 1923 (156)
- Gypsophila paniculata L.
- Chamaenerion Gesneri 1879 (46)
- Epilobium palustre L.
- Chamaenerion villosum majus parvo flore 1694 (46) Tournefort
- Epilobium parviflorum Schreb.
- Chamaerhodos 1900 (158)
- Chamaerhodos Bunge
- Chamaesaracha 1977-1986 (3, 4)
- Chamaesaracha coniodes (Moric. ex Dunal) Britton
- Chamenaerion angustifolium glabrum 1694 (46) Tournefort
- Epilobium palustre L.
- Chamiso (Mexican) 1856 (147)
- Atriplex canescens (Pursh) Nutt. [reported as: Obione canescens]
- Chamisso's cotton-grass [Chamisso's cottongrass] Present (50)
- Eriophorum chamissonis C.A. Mey.
- Chamisso's shield fern 1878 (86) for botanist on Vancouver's voyage
- Polystichum munitum (Kaulfuss) K. Presl. [reported as: Aspidium munitum Kaulfuss]
- Chamiza 1937 (124) TX
- Atriplex canescens (Pursh) Nutt.
- Chamomila foetidum 1671 (165) Bauh. pin. 165
- Anthemis cotula L.
- Chamomile [Camomile]
- 1814-Present (4, 10, 50, 82, 138, 155, 156, 158, 167)
- Anthemis L. [also reported as: Anthemis (Michx.) L.]
- 1900-1936 (93, 158) Neb
- Matricaria L.
- 1932 (85) SD
- Matricaria discoidea DC. [reported as: Chamomilla suaveolens (Pursh) Rydb.]
- Chamomile Romaine (French) 1892 (6)
- Anthemis arvensis L.
- Champion or Champion oak 1882-1923 (14, 156, 158)
- Quercus rubra L.
- Champlain willow 1857 (20)
- Salix nigra Marsh. [reported as: Salix ligustrina Michx. f.]
- Chan iyuwe (Dakota, twining on a tree 1919 (37)
- Humulus lupulus L. var. lupuloides E. Small [reported as: Humulus americanus Nutt.]
- Chandler's grass [Chandler grass] 1885-1908 (45, 64, 66, 69, 90)
- Elymus repens (L.) Gould [also reported as: Agropyron repens (L.) Beauv., Agropyrum repens]
- Chan-ha san (Dakota, pale bark) 1919 (37)
- Acer saccharum Marsh.
- Chanhaloga pezhuta (Dakota) 1919 (37)
- Verbena hastata L.
- Chanpa (Dakota) 1919 (37)
- Prunus virginiana L. var. virginiana [reported as: Padus nana (Du Roi) M. Roemer]
- Chan-pezhuta (Dakota, wood-medicine) 1919 (37)
- Osmorhiza longistylis (Torr.) DC. [reported as: Washingtonia longistylis (Torr.) Britton]
- Chan-sapa (Dakota Teton, black wood) 1919 (37)
- Juglans nigra L.
- Chan-shasha (Dakota, red wood) 1919 (37)
- Cornus amomum P. Mill.
- Chan-shasha-hinchake (Dakota) 1919 (37)
- Cornus sericea L. ssp. sericea [reported as: Cornus stolonifera Michx.]
- Chanshilshila or Chanshinshinla (Dakota Teton) 1919 (37)
- Silphium laciniatum L.
- Chan-shushka (Dakota-Teton) 1919 (37)
- Acer negundo L.
- Chansu or Chansu-hu (Hickory tree) (Dakota) 1919 (37)
- Carya ovata (P. Mill.) K. Koch [reported as: Hicoria ovata (P. Mill.) Britton]
- Chanure 1879 (46)
- Apocynum cannabinum L.
- Chanvre (French) 1886-1892 (6, 110)
- Cannabis sativa L.
- Chanvre aquatique (French) 1900 (158)
- Bidens tripartita L.
- Chanvre bâtard (French) 1900 (158)
- Galeopsis bifida Boenn. [reported as: Galeopsis tetrahit L.]
- Chanvre du Canada (French) 1892 (6, 158)
- Apocynum cannabinum L.
- Chan-zi (Dakota, yellow-wood) 1919 (37)
- Rhus glabra L.
- Chapman's blue grass [Chapman's bluegrass, Chapman bluegrass] 1942-Present (3, 50, 155)
- Poa chapmaniana Scribn.
- Chapman's hill thorn 1913 (5)
- Crataegus punctata Jacq. [reported as: Crataegus collina Chapman]
- Chapman's spear grass [Chapman's spear-grass] 1852-1938 (5, 56, 72, 119, 163)
- Poa chapmaniana Scribn.
- Chapparal 1898 (77) TX
- Phyla cuneifolia (Torr.) Greene [reported as: Lippia cuneifolia Steud]
- Chap-ta-haza (Dakota, beaver berries) 1919 (37)
- Ribes americanum P. Mill.
- Chaputa or Chaputa-hu (elder bush) (Dakota) 1919 (37)
- Sambucus nigra L. ssp. canadensis (L.) R. Bolli [reported as: Sambucus canadensis L.]
- Charlock
- 1919 (107)
- Brassica L.
- 1923 (156)
- Brassica nigra (L.) W.D.J. Koch
- 1840-1923 (6, 19, 156)
- Raphanus raphanistrum L.
- 1932-1936 (1, 93) Neb
- Sinapis L.
- 1900-1929 (5, 156, 157, 158)
- Sinapis alba L. [also reported as: Brassica alba Hook.]
- 1770-1986 (3, 4, 5, 14, 15,14, 41, 85, 92, 97, 107, 109, 155)
- Sinapis arvensis L. [also reported as: Brassica kaber (DC.) Wheeler, Brassica sinapistrum Boiss.]
- Charlock mustard Present (50)
- Sinapis arvensis L.
- Charme à fruit d'houblon (French) 1785 (8)
- Ostrya virginiana (P. Mill.) K. Koch [reported as: Carpinus ostrya L. (possibly this species), Ostrya virginica]
- Charopesha (Missouri tribes) 1828 (7)
- Melothria pendula L. [reported as: Melothria nigra Raf.]
- Chasbowl 1900 (158) possibly a verbal corruption of Cheese bowl
- Papaver rhoeas L.
- Chashke-hu (Winnebago) 1919 (37)
- Quercus macrocarpa Michx.
- Chasse Diable (French) 1892 (6)
- Hypericum perforatum L.
- Chaste tree [Chaste-tree, Chastetree]
- 1923-Present (50, 82, 138)
- Vitex L.
- 1828-1949 (7, 82, 92, 109, 158)
- Vitex agnus-castus L.
- Chataire (French) 1900 (158)
- Nepeta cataria L.
- Chayapula (Sanskrit) 1886 (110)
- Citrullus lanatus (Thunb.) Matsumura & Nakai [reported as: Citrullus vulgaris Schrad]
- Cheat 1900-1929 (5, 156, 157, 158)
- Camelina sativa (L.) Crantz
- Cheat or Cheat grass [Cheatgrass, Cheat-grass]
- 1936 (93) Neb
- Bromus L.
- 1852-1977 (1, 3, 5, 46, 56, 62, 66, 72, 75, 80, 85, 87, 88, 90, 92, 93, 94, 119, 145, 158, 163)
- Bromus secalinus L.
- 1939-Present (50, 146)
- Bromus tectorum L.
- 1977 (3)
- Coelorachis cylindrica (Michx.) Nash [reported as: Manisuris cylindrica (Michx.) O. Ktze.]
- 1894-1938 (75, 119, 157, 158) CA OK
- Lolium temulentum L.
- Cheatgrass brome 1942-1944 (140, 155) CO
- Bromus tectorum L.
- Checkerbloom Present (50)
- Sidalcea Gray
- Checker-mallow [Checkermallow] 1942 (155)
- Sidalcea Gray
- Cheekweed [Cheek weed] 1671 (46) Josselyn
- Stellaria media (L.) Vill.
- Cheena (Hindu and Bengali) 1886 (110)
- Panicum miliaceum L.
- Cheerful sunflower Present (50)
- Helianthus Χlaetiflorus Pers. [pauciflorus Χ tuberosus]
- Cheese-bowl [Cheese bowl, Cheesebowl] 1876-1923? (5, 92, 156, 158) obsolete by 1923
- Papaver rhoeas L.
- Cheese plant 1892 (73)
- Malva rotundifolia L.
- Cheese rennet herb 1876 (92)
- Galium aparine L.
- Cheese-cake [Cheese-cake] or Cheese-cake plant 1900-1929 (5, 156, 157, 158)
- Malva sylvestris L.
- Cheese-flower [Cheese-flower]
- 1923 (156)
- Malva rotundifolia L.
- 1900-1929 (5, 156, 157, 158)
- Malva sylvestris L.
- Cheese-rennet [Cheese rennet] 1900-1923 (107, 156, 158)
- Galium verum L.
- Cheeses
- 1932 (1)
- Malva L. [reported as: Malva (Tourn.) L.]
- 1892 (5, 62, 73, 80, 92, 97, 156)
- Malva rotundifolia L.
- 1919 (107)
- Malva sylvestris L.
- Cheese's running mallow 1899 (131) SD
- Malva rotundifolia L.
- Cheesetts 1896 (76) Oxford Co. ME
- Malva rotundifolia L.
- Cheeseweed mallow Present (50)
- Malva parviflora L.
- Chelandine 1898 (49)
- Chelidonium majus L.
- Chélidoine (French) 1900 (158)
- Chelidonium majus L.
- Chelidonium 1905-1917 (54, 57)
- Chelidonium majus L.
- Ché-m t-toh (Cuchan Yuma) 1855 (132)
- Citrullus lanatus (Thunb.) Matsumura & Nakai
- Ché-met-a-qúis (Cuchan Yuam) 1855 (132)
- Cucumis melo L.
- Ché-m et-on-ya (Cuchan Yuma) 1855 (132)
- Citrullus lanatus (Thunb.) Matsumura & Nakai
- Cheêne (French) 1785 (8)
- Quercus L. [reported as: Quercus (Tourn.) L.]
- Cheêne à lattes (French) 1796 (17, 33)
- Quercus imbricaria Michx.
- Cheêne blanc (French) 1785 (8)
- Quercus alba L.
- Cheêne noir à feuilles entiér (French) 1785 (8)
- Possibly, Quercus marilandica Muench [reported as: Quercus nigra integrifolia]
- Cheêne ondule (French) 1857 (20)
- Quercus Χpauciloba Rydb. [gambelii Χ turbinella] [reported as: Quercus undulata Torr.]
- Chêne rouge égrande espéce (French) 1785 (8)
- Quercus rubra L. var. rubra [reported as: Quercus rubra maxima , Quercus rubra var. maxima Marshall, Quercus maxima (Marsh.) Ashe)]
- Chenile 1913-1923? (5, 156) obsolete by 1923
- Hyoscyamus niger L.
- Chenipodium 1919 (52)
- Chenopodium ambrosioides L.
- Chénopode é grappes (French) 1900 (158)
- Chenopodium botrys L.
- Chénopode Anthelmintique (French) 1892 (6)
- Chenopodium ambrosioides L. var. ambrosioides [reported as: Chenopodium anthelminticum L.]
- Chenopodium seu Botrys Anthelminticum 1828 (7)
- Chenopodium ambrosioides L. var. ambrosioides [reported as: Chenopodium anthelminticum L.]
- Chenopodium stramonii folio 1722 (46) Valiant
- Chenopodium simplex (Torr.) Raf. [reported as: Chenopodium hybridum auct. non L.]
- Chequered lily 1818 (10)
- Fritillaria L.
- Cherry [Cherries] or Cherry tree
- 1814-1986 (1, 4, 7, 10, 63, 138, 148, 155, 158, 167)
- Prunus L.
- 1894-1919 (106, 107, 114)
- Prunus cerasus L.
- Cherry birch 1900-1936 (5, 93, 158)
- Betula occidentalis Hook. [reported as: Betula fontinalis Sargent]
- Cherry tomato [Cherry-tomato, Cherry tomatoes]
- 1898 (77) Eastern end of Long Island
- Physalis L.
- 1913-1923 (5, 156)
- Solanum lycopersicum L. var. lycopersicum [also reported as: Lycopersicon esculentum P. Mill., Lycopersicon lycopersicon (L.) Karst]
- Cherry wood [Cherry-wood] 1900-1923? (5, 156, 158) obsolete by 1923
- Viburnum opulus L.
- Cherry-laurel 1923 (138)
- Prunus L. [reported as: Laurocerasus]
- Cherry-stone juniper [Cherrystone juniper] 1923-1937 (112, 138)
- Juniperus monosperma (Engelm.) Sarg.
- Chervil
- 1900-Present (1, 4, 50, 155, 158)
- Chaerophyllum L.
- 1977 (3)
- Chaerophyllum procumbens (L.) Crantz
- 1986 (4)
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