|
- Kaapsit (Pawnee) 1919 (37)
- Celtis occidentalis L.
- Kada-kuns (Chippewa, little kada) 1932 (105)
- Aralia nudicaulis L.
- Kaddig (German) 1900 (158)
- Juniperus communis L.
- Kadegimnedu (Chippewa) 1932 (105)
- Ceanothus americanus L.
- Kadelee (Malay) 1886 (110)
- Glycine max (L.) Merr. [reported as: Dolichos soja L. ]
- Kadem-sku-min (Chippewa) 1932 (105)
- Rubus occidentalis L.
- Kaer (Esthonian) 1886 (110)
- Avena sativa L.
- Kafir or Kafir corn [Kafir-corn, Kaffir corn] 1896-1949 (56, 107, 109, 119, 151, 155)
- Sorghum bicolor (L.) Moench ssp. bicolor [also reported as: Sorghum vulgare Pers., Sorghum vulgare Pers. var. caffrorum Hubbard & Rehd. ]
- Kâ'ga skûntai (Cherokee, crow shin) 1885 (102)
- Adiantum pedatum L.
- Kahn (Persian and Hindu) 1886 (110)
- Lactuca sativa L. [reported as: Lactuca scariola L. var. sativa Moris]
- Kahts-kiwahaaru (Pawnee, swamp medicine) 1919 (37)
- Mentha arvensis L. [reported as: Mentha canadensis L. ]
- Kahts-pidipatski (Pawnee, small medicine) 1919 (37)
- Dalea purpurea Vent. var. purpurea [reported as: Petalostemum purpureum (Vent.) Rydb. ]
- Kahts-pirakari or kahts-pilakari (Pawnee, medicine with many children) 1919 (37)
- Rumex hymenosepalus Torr.
- Kahtstakat (Pawnee, yellow medicine) 1919 (37)
- Mirabilis nyctaginea (Michx.) MacM. [reported as: Allionia nyctaginea Michx., Alliona nyctaginea Michx. ]
- Kahtstaraha (Pawnee, buffalo medicine) 1919 (37)
- Osmorhiza longistylis (Torr.) DC. [reported as: Washingtonia longistylis (Torr.) Britton ]
- Kahts-tawas (Pawnee, rough medicine) 1919 (37)
- Silphium laciniatum L.
- Kahts-tuwiriki (Pawnee, whirlwind medicine) 1919 (37)
- Ipomoea leptophylla Torr.
- Kaisersalat (German) 1900 (158)
- Artemisia dracunculus L.
- Kaladana 1900-1911 (55, 157)
- Ipomoea hederacea Jacq.
- Kale 1919 (107)
- Brassica L.
- Kalispell 1932 (1)
- Heuchera L.
- Kalm's lobelia 1913-1986 (3, 4, 5, 156)
- Lobelia kalmii L.
- Kalmus (German) 1828 (7, 158)
- Acorus calamus L.
- Kamalottara (Sanskrit) 1886 (110)
- Carthamus tinctorius L.
- Kamass root 1871 (103)
- Camassia scilloides (Raf.) Cory [reported as: Camassia esculenta (Ker.) Robins]
- Kamosh 1919 (107)
- Camassia scilloides (Raf.) Cory [reported as: Camassia esculenta Lindl. ]
- Kanas (Keltic and Breton) 1886 (110)
- Cannabis sativa L.
- Kande (Omaha-Ponca) 1919 (37) Kande-hi (Plum tree)
- Prunus angustifolia Marsh.
- Kangu (Sanskrit) 1896 (45)
- Setaria italica (L.) Beauv.
- Kansas arrowhead Present (50)
- Sagittaria ambigua J.G.Sm.
- Kansas gayfeather [Kansas gay feather] 1923-1942 (155, 156)
- Liatris pycnostachya Michx.
- Kansas hawthorn 1942-Present (50, 155)
- Crataegus coccinioides Ashe
- Kansas mugwort 1913-1937 (5, 97)
- Artemisia carruthii Wood ex Carruth. [also reported as: Artemisia kansana Britton]
- Kansas rain lily [Kansas rainlily] 1942 (155)
- Cooperia drummondii Herb. [reported as: Cooperia kansensis W.C. Stevens ]
- Kansas sage 1882 (48) KS
- Salvia azurea Michx.ex Lam. var. grandiflora Benth. [reported as: Salvia pitcheri Torr. ex Benth. ]
- Kansas sagittaria 1913-1937 (5, 97)
- Sagittaria ambigua J.G.Sm.
- Kansas thistle 1898 (4, 77) Southwest MO
- Solanum rostratum Dunal
- Kansas violet 1942 (155)
- Viola nephrophylla Greene [reported as: Viola retusa Greene ]
- Kante (Dakota, plum) 1919 (37) Kante-hu (Plum tree)
- Prunus angustifolia Marsh.
- Kantsh (Winnebago) 1919 (37) Kantsh-hu (Plum tree)
- Prunus angustifolia Marsh.
- Kao-liang (Chinese "tall millet or great millet") 1886 (110)
- Sorghum bicolor (L.) Moench [reported as: Holcus saccharatus L. ]
- Kapak-minš (Chippewa, brittle tree) 1932 (105)
- Lindera benzoin Blume. [reported as: Benzoin aestivale (L.) Nees ]
- Kari (Georgian) 1886 (110)
- Avena sativa L.
- Karipika or kalipika tsitsiks (Pawnee) 1919 (37)
- Euphorbia marginata Pursh [reported as: Dichrophyllum marginatum (Pursh) KL. & Garcke. ]
- Karípiku (Pawnee) 1919 (37)
- Asclepias syriaca L.
- Karpus (Turkey) 1886 (110)
- Citrullus lanatus (Thunb.) Matsumura & Nakai [reported as: Citrullus vulgaris Schrad ]
- Kars or Karse 1900 (158)
- Rorippa nasturtium-aquaticum (L.) Hayek [reported as: Nasturtium officinale R.Br., Rorippa nasturtium (L.) Rusby ]
- Kâsd'úta (Cherokee, simulating ashes) 1886 (102) from appearance of leaves
- Pseudognaphalium macounii (Greene) Kartesz [reported as: Gnaphalium decurrens Ives ]
- Käsepappel (German) 1900 (158)
- Malva sylvestris L.
- Kassader 1828 (7)
- Ipomoea pandurata (L.) G.F.W. Mey. [reported as: Convolvulus panduratus ]
- Kässekraut (German) 1900 (158)
- Malva rotundifolia L.
- Kataaru (Pawnee) 1830 (37)
- Hierochloe odorata (L.) Beauv. [reported as: Savastana odorata (L.) Scribn. ]
- Katniss
- 1770-1879 (41, 46)
- Sagittaria latifolia Willd. [also reported as: Sagittaria variabilis Engelm. ]
- 1879 (46)
- Zizania aquatica L.
- Katzenkraut (German) 1900 (158)
- Nepeta cataria L.
- Katzenminze (German) 1900 (158)
- Nepeta cataria L.
- Kauwe-šabu-min (Chippewa, prickly gooseberry) 1932 (105)
- Ribes cynosbati L.
- Kearney threeawn 1942 (155)
- Aristida longispica Poir. var. geniculata (Raf.) Fern [reported as: Aristida intermedia Scribn. & Ball ]
- Keays' weed [Keays weed] 1898 (77) Paris ME
- Galeopsis bifida Boenn. [reported as: Galeopsis tetrahit L. ]
- Kedlock
- 1876-1929 (5, 92, 157, 158)
- Sinapis alba L.
- 1913 (5)
- Sinapis arvensis L.
- Keeled brome 1901 (56) IA
- Bromus carinatus H. & A.
- Keeled bulrush Present (50)
- Isolepis carinata Hook. & Arn. ex Torr.
- Keermesbeer (German) 1900 (158)
- Phytolacca americana L. var. americana [reported as: Phytolacca decandra L. ]
- Keeslip 1900 (158)
- Galium verum L.
- Kegchros 1886-1919 (Greek) (107, 110)
- Panicum miliaceum L.
- Kellogg's spurred lupine Present (50)
- Lupinus caudatus Kellogg ssp. argophyllus (Gray) L. Phillips
- Kellup weed, Kellip-weed 1894 (75, 158) Montpelier VT
- Leucanthemum vulgare Lam. [also reported as: Chrysanthemum leucanthemum L.]
- Kelp 1896-1900 (76, 158) South Berwick ME, misapplied
- Nuphar lutea (L.) Sm. ssp. advena (Aiton) Kartesz & Gandhi [also reported as: Nuphar advena Aiton f., Nymphaea advena Soland. ]
- Kelpwort [Kelp-wort]
- 1828 (7)
- Salicornia L. [reported as: Salicornia (Tourn.) L. ]
- 1900 (5, 156, 158)
- Salsola kali L.
- Kemp [Kemps]
- 1900-1929 (5, 62, 156, 157, 158) IN, old english name
- Plantago lanceolata L.
- Kemp 1900 (158) misapplied
- Plantago major L.
- Kempseed [Kemp-seed] 1900-1923 (5, 62, 156, 158) IN, old english name
- Plantago lanceolata L.
- Kengashi 1929 (157)
- Ipomoea hederacea Jacq.
- Kenilworth or Kenilworth ivy [Kenilworth-ivy, Kenilworth ivy]
- 1900 (158)
- Cymbalaria Hill [reported as: Cymbalaria Medik. (probably Cymbalaria Hill. meant) ]
- 1913-Present (4, 5, 50, 107, 138, 155, 156)
- Cymbalaria muralis P.G. Gaertn., B. Mey. & Scherb. [also reported as: Cymbalaria cymbalaria (L.) Wettst., Linaria cymbalaria (L.) P. Mill. ]
- Kenningwort 1671-1923 (46, 156) cultivated by English colonists by 1671, Josselyn
- Chelidonium majus L.
- Kentucky blue grass [Kentucky blue-grass, Kentucky bluegrass]
- 1852-Present (3, 5, 45, 50, 56, 66, 67, 68, 72, 85, 87, 90, 92, 94, 109, 111, 115, 118, 119, 122, 129, 134, 138, 140, 143, 144, 146, 155, 163)
- Poa pratensis L.
- Present (50)
- Poa pratensis L. ssp. pratensis
- Kentucky coffee tree [Kentucky coffee-tree, Kentucky coffeetree]
- 1936 (93) Neb
- Gymnocladus Lam.
- 1873-Present (1, 2, 3, 4, 5, 6, 9, 14, 37, 48, 50, 63, 72, 76, 82, 85, 92, 97, 107, 109, 112, 113, 130, 131, 138, 155, 156, 157, 158)
- Gymnocladus dioicus (L.) K. Koch [also reported as: Guilandina dioica L., Gymnocladus canadensis Lam., Gymnocladus dioica (L.) Koch ]
- Kentucky hemp 1882 (14)
- Laportea canadensis (L.) Weddell [reported as: Urtica canadensis ]
- Kentucky mahogany 1876?-1929? (5, 6, 49, 92, 156, 157, 158)
- Gymnocladus dioicus (L.) K. Koch [also reported as: Guilandina dioica L., Gymnocladus canadensis) Lam ]
- Kentucky-hunter [Kentucky hunter] 1898 (77) Sulphur Grove OH; Paris ME
- Calystegia sepium (L.) R. Br. ssp. angulata Brummitt [reported as: Convolvulus sepium L. ]
- Kentucky-moss [Kentucky moss] 1896-1923 (5, 76, 156, 158) Sulphur Grove OH
- Portulaca grandiflora Hook.
- Kenukatía-minš (Chippewa) 1932 (105)
- Rosa L.
- Keravoulia (Modern Boeotians) 1919 (107)
- Physalis alkekengi L.
- Kerch (Armorican) 1886 (110)
- Avena sativa L.
- Kerlock 1900-1929 (5, 157, 158)
- Brassica nigra (L.) W.D.J. Koch
- Kerlock 1913 (5)
- Sinapis arvensis L.
- Ketsach (Hebrew) 1886 (110)
- Vicia sativa L.
- Keugthe hi (Osage) 1918?-1970? (121)
- Baptisia Vent.
- Khursa or koursa (Hindustani) 1886 (110)
- Portulaca oleracea L.
- Kiarr-kafle (Swedish) 1879 (46)
- Alopecurus geniculatus L.
- Kiarr-tatel (Swedish) 1879 (46)
- Catabrosa aquatica (L.) Beauv.
- Kicking-colt [Kicking colt] 1892-1929 (5, 73, 156, 157, 158) E. MA
- Impatiens capensis Meerb. [also reported as: Impatiens biflora Walt., Impatiens fulva Nutt. ]
- Kicking-horses [Kicking horses] 1892-1929? (5, 76, 156, 157, 158) Paris ME because ripe seed vessels burst open when touched
- Impatiens capensis Meerb. [also reported as: Impatiens biflora Walt., Impatiens fulva Nutt. ]
- Kiditako (Pawnee) 1919 (37)
- Fraxinus pennsylvanica Marsh.
- Kidney bean
- 1870-1930 (82, 103)
- Phaseolus L. [also reported as: Phaseolus (Tourn.) L. ]
- 1818 (10)
- Phaseolus polystachios (L.) B.S.P. [reported as: Phaseolus perennis Walt. ]
- 1886-Present (6, 50, 107, 109, 110, 138)
- Phaseolus vulgaris L. [also reported as: Phaseolus vulgaris Savi (Possibly the same species) ]
- Kidney-bean root [Kidney bean root] 1876 (92)
- Eupatorium purpureum L.
- Kidney-leaf buttercup [Kidney-leaved buttercup] 1933 (126) ND
- Ranunculus abortivus L.
- Kidney-leaf crowfoot [Kidney-leaved crowfoot] 1899-1937 (5, 62, 97, 127, 131, 156, 158) Book name
- Ranunculus abortivus L.
- Kidney-leaf mud-plantain [Kidneyleaf mudplantain] Present (50)
- Heteranthera reniformis R. & P.
- Kidney-leaf violet [Kidneyleaf violet, Kidney-leaved violet] 1913-1986 (3, 4, 5, 155)
- Viola renifolia Gray
- Kidneyroot [Kidney root] 1907-1908 (5, 64)
- Eupatorium purpureum L.
- Kidneywort 1923 (156)
- Eupatorium purpureum L.
- Kiha piliwus hawastat (Pawnee, broom weed) 1919 (37)
- Dalea purpurea Vent. var. purpurea [reported as: Petalostemum purpureum (Vent.) Rydb. ]
- Kihapiliwus (Pawnee, broom) 1919 (37)
- Artemisia dracunculus L. [reported as: Artemisia dracunculoides Pursh ]
- Kill-cow [Kill cow] 1894-1923 (5, 75, 156) WV
- Eleocharis tenuis (Willd.) J.A. Schultes
- Killikinic
- 1900 (158)
- Cornus amomum P. Mill.
- 1900 (158)
- Cornus sericea L. ssp. sericea [reported as: Cornus stolonifera Michx. ]
- Killwort or Kill-wart 1900-1923 (5, 156, 158)
- Chelidonium majus L.
- Killweed [Kill-weed] 1923 (156)
- Lythrum salicaria L.
- King physic 1879 (46)
- Salix humilis Marsh. var. tristis (Aiton) Griggs [reported as: Salix tristis Aiton ]
- King-cob [King cob] 1879 (46)
- Ranunculus bulbosus L.
- Kingcup [King cup, King-cup, Kingcups, King's cup, King cups, King's-cup, Kings' cup]
- 1913-1923 (5, 156)
- Caltha palustris L.
- 1882 (14)
- Ranunculus L.
- 1896-1929 (76, 157, 158) ME
- Ranunculus acris L.
- 1879-1913 (5, 46, 6, 92)
- Ranunculus bulbosus L.
- Kinghead [King-head] 1912-1923 (62, 156)
- Ambrosia trifida L.
- Kingnut [King nut, King-nut]
- 1894-19123 (5, 75, 156, 158) WV, misapplied
- Carya alba (L.) Nutt. ex Ell. [also reported as: Hicoria alba (L.) Britton ]
- 1895-1949 (2, 5, 82, 93, 109, 156, 158)
- Carya laciniosa (Michx. f.) G. Don [also reported as: Carya laciniosa Loud., Carya sulcata Nutt., Hicoria laciniosa (Michx. f.) Sarg. ]
- 1913-1923 (5, 156) misapplied
- Carya ovata (P. Mill.) K. Koch [also reported as: Hicoria ovata (P. Mill.) Britton ]
- Kingnut hickory 1977 (3)
- Carya laciniosa (Michx. f.) G. Don
- King-of-the-meadow 1896-1923 (5, 64, 76, 156, 158)
- Eupatorium purpureum L.p>
- King's clover [Kings' clover] 1876-1929 (5, 92, 156, 157, 158)
- Melilotus officinalis (L.) Lam.
- King's crown [King's-crown] 1900-1929? (5, 156, 157, 158)
- Melilotus officinalis (L.) Lam.
- King's cure-all [King's-cure-all]
- 1923 (156)
- Silene stellata (L.) Aiton f.
- 1893-1923? (5, 74, 156, 157, 158) Southern states, used in domestic medicine, obsolete by 1923
- Oenothera biennis L. [also reported as: Onagra biennis (L.) Scop. ]
- King's fern [King fern)] 1876?-1929 (5, 92, 157)
- Osmunda regalis L.
- King's fescue 1901 (94)
- Leucopoa kingii (S. Wats.) W.A. Weber [reported as: Festuca kingii (S. Wats.) Scribn. ]
- Kinnikinnick [Kinnikinik, Kinnikinnick, Kinnikinic, Kinnikinnik] reportedly, this was the native American name for any plant that could be mixed with tobacco and smoked
- 1932 (1)
- Arctostaphylos Adans.
- 1932 (1)
- Cornus L. [reported as: Svida Opiz. ]
- 1900-1932 (5, 37, 72, 85, 93, 95, 107, 156, 157, 158)
- Cornus amomum P. Mill. [also reported as: Svida amomum (P. Mill.) Small ]
- 1852-1899 (2, 6, 46, 47, 58, 63, 113, 130) Parry says this is the "true" kinnikinnic
- Cornus sericea L.
- 1900-1923 (5, 37, 101, 156, 158)
- Cornus sericea L. ssp. sericea [also reported as: Cornus stolonifera Michx. ]
- 1923 (156)
- Lobelia inflata L.
- Kinnikinnick bark 1876 (92)
- Cornus sericea L.
- Kino Americanus 1828 (7)
- Geranium maculatum L.
- Kiplohkos (Lettons) 1886 (110)
- Allium sativum L.
- Kirik-tara-kata (Pawnee, yellow eyes) 1919 (37)
- Helianthus annuus L.
- Kirit (Pawnee, cricket) 1830 (37)
- Sagittaria latifolia Willd.
- Kirit-tacharush (Pawnee, eye-itch) 1830 (37) name refers to flying down causing eye irritation
- Typha latifolia L.
- Kisaktomas-nut 1900 (158)
- Carya Nutt. [reported as: Hicoria Raf. ]
- Kiskatom 1900 (158) obsolete by 1900
- Carya Nutt. [reported as: Hicoria Raf. ]
- Kisky-Thomas-nut 1900 (158)
- Carya Nutt. [reported as: Hicoria Raf. ]
- Kiskytom 1892-1894 (6, 75) Ostego Co. NY
- Carya alba (L.) Nutt. ex Ell.
- Kisosit (Pawnee)
- 1919 (37)
- Oxalis stricta L. [reported as: Xanthoxalis stricta (L.) Small ]
- 1919 (37)
- Oxalis violacea L. [reported as: Ionaoxalis violacea (L.) Small. ]
- Kisses
- Present (50)
- Gaura suffulta Engelm. ex Gray
- 1900 (158)
- Viola tricolor L.
- Kiss-me 1900 (158)
- Viola tricolor L.
- Kiss-me-Dick 1913-1923 (5, 156)
- Euphorbia cyparissias L. [also reported as: Tithymalus cyparissias (L.) Hill. ]
- Kiss-me-over-the-fence 1898 (77) Sulphur Grove OH
- Polygonum orientale L.
- Kiss-me-over-the-garden-gate 1977-Present (3, 4, 50)
- Polygonum orientale L.
- Kiss-me-quick [Kiss me quick]
- 1900-1923 (156, 158)
- Euphorbia cyparissias L.
- Present (50)
- Portulaca pilosa L.
- Kiss-me-quick-and-go 1900-1929 (156, 157, 158)
- Artemisia abrotanum L.
- Kisu-sit (Pawnee, long tapering) 1919 (37)
- Helianthus tuberosus L.
- Kisúts (Pawnee)
- 1919 (37)
- Vitis cinerea (Engelm.) Millard
- 1919 (37)
- Vitis vulpina L.
- Kitapato (Pawnee) 1919 (37)
- Salix L.
- Kitchen rose 1900-1913 (5, 158)
- Rosa eglanteria L. [also reported as: Rosa rubiginosa L. ]
- Kit-of-the-wall 1923 (156)
- Sedum acre L.
- Kitsarius (Pawnee, green juice) 1919 (37)
- Chenopodium album L.
- Kitsitsaris (Pawnee, bad plant) 1919 (37)
- Desmanthus illinoensis (Michx.) MacM. ex B.L. Robins. & Fern. [reported as: Acuan illinoensis (Michx.) Kuntze ]
- Kits-kat (Pawnee, standing in water) 1830 (37)
- Sagittaria latifolia Willd.
- Kitten's-breeches [Kitten breeches, Kitten-breeches] 1896-1923 (5, 76, 156, 158) Sulphur Grove OH obsolete by 1923
- Dicentra cucullaria (L.) Bernh. [also reported as: Bicuculla cucullaria (L.) Millsp. ]
- Kittentail [Kitten-tails]
- 1932-Present (1, 4, 50)
- Besseya Rydb. [also reported as: Besseya Rydb. ]
- 1932-1977 (3, 85) SD
- Besseya wyomingensis (A. Nels.) Rydb.
- Kiu makan (Omaha-Ponca, wound medicine) 1919 (37)
- Asclepias tuberosa L.
- Kiwaut (Pawnee) 1919 (37)
- Artemisia ludoviciana Nutt. ssp. ludoviciana [reported as: Artemisia gnaphalodes Nutt. ]
- Kiwoh'ki (Pawnee) 1919 (37)
- Artemisia frigida Willd.
- Kjo (Japanese) 1879 (46)
- Fagopyrum esculentum Moench [reported as: Polygonum fagopyrum L. ]
- K'kwe ulasu'la (Cherokee, partridge mocassin) 1885 (102)
- Cypripedium parviflorum Salisb.
- Klanglein (German) 1886 (110)
- Linum usitatissimum L. [reported as: Linum usitatissimum L. var. humile (P. Mill.) Pers. ]
- Klapperrose (German) 1900 (158)
- Papaver rhoeas L.
- Klasgras (Swedish) 1879 (46)
- Linnaea borealis L.
- Klatschrose (German) 1900 (158)
- Papaver rhoeas L.
- Klebkraut (German) 1900 (158)
- Galium aparine L.
- Kleebaum (German) 1900 (158)
- Ptelea trifoliata L.
- Kleiner Schachtelbalm (German) 1900 (158)
- Equisetum arvense L.
- Kleines Sinngrün (German) 1900 (158)
- Vinca minor L.
- Klette (German) 1892 (6)
- Arctium lappa L.
- Klettenwurzel (German) 1900 (158)
- Arctium lappa L.
- Klops 1923? (156) obsolete by 1923
- Plantago lanceolata L.
- Knap 1900-1929 (5, 157, 158)
- Trifolium pratense L.
- Knap-bottle [Knap bottle] 1913-1923? (5, 156) obsolete by 1923
- Silene vulgaris (Moench) Garcke [also reported as: Silene latifolia (P. Mill.) Britton & Rendle ]
- Knapweed [Knap weed]
- 1818-Present (4, 10, 50)
- Centaurea L.
- 1900-1929 (157, 158) misapplied
- Centaurea cyanus L.
- 1828-1913 (7, 80)
- Centaurea solstitialis L.
- Knawel
- 1900-1986 (4, 13, 155, 158)
- Scleranthus L.
- 1818-1932 (1, 5, 10, 92, 156, 158)
- Scleranthus annuus L.
- Knee grass [Knee-grass] 1897 (145) KS
- Panicum dichotomiflorum Michx. [reported as: Panicum proliferum Lam. ]
- Knee knotweed 1840 (19)
- Polygonum pensylvanicum L.
- Knight's-cross [Knight's cross, Knight-cross] 1900-1923 (5, 156, 158)
- Lychnis chalcedonica L.
- Knight's-spur Present (50)
- Consolida S.F. Gray
- Knoblauch (German) 1886 (110, 158)
- Allium sativum L.
- Knoblauchkraut (German) 1900 (158)
- Alliaria petiolata (Bieb.) Cavara & Grande [reported as: Alliaria alliaria (L.) Britton ]
- Knock-heads 1923 (156)
- Plantago lanceolata L.
- Knollige Schwalbenwurz (German) 1828-1900 (7, 6, 158)
- Asclepias tuberosa L.
- Knollinger hahnenfuss (German) 1892 (6)
- Ranunculus bulbosus L.
- Knopfbusch (German) 1892 (6)
- Cephalanthus occidentalis L.
- Knop-sedge 1900 (158)
- Sparganium L.
- Knot bindweed 1900-1923 (5, 156, 158)
- Polygonum convolvulus L. [also reported as: Tiniaria convolvulus (L.) Webb & Moq.]
- Knot grass [Knot-grass, Knotgrass]
- 1876-1913 (5, 92)
- Elymus repens (L.) Gould [also reported as: Agropyron repens(L.) Beauv., Triticum repens L.]
- 1852-Present (3, 4, 50, 94, 119, 122, 151, 155, 163)
- Paspalum distichum L. [also reported as: Paspalum paspalodes (Michx.) Scribn.]
- Knöterich (German) 1892 (6)
- Polygonum punctatum Ell. var. punctatum [reported as: Polygonum acre Kunth]
- Knot-grass [Knot grass, Knotgrass]
- 1913-1923 (5, 156) misapplied
- Hippuris vulgaris L.
- 1900 (158) misapplied
- Paronychia P. Mill.
- 1814-1936 (1, 93, 167)
- Polygonum L. [also reported as: Polygonum (Tourn.) L. ]
- 1671-1937 (5, 7, 19, 45, 46, 62, 92, 97, 122, 129, 131, 156, 158) accidentally introduced by 1671, Josselyn
- Polygonum aviculare L.
- Knot-root bristle grass [Knotroot bristlegrass, Knotroot bristle grass] 1937-1977 (3, 122, 155)
- Setaria parviflora (Poir.) Kerguélen
[also reported as: Setaria geniculata (Lam.) Beauv. ]
- Knot-root grass [Knot root grass]
- 1901 (5, 56)
- Muhlenbergia mexicana (L.) Trin.
- 1890 (68)
- Muhlenbergia racemosa (Michx.) B.S.P.
- Knot-sheath sedge [Knotsheath sedge] Present (50)
- Carex retrorsa Schwein
- Knotted rush
- 1907-Present (3, 5, 50, 72, 93, 156)
- Juncus nodusus L.
- Present (50)
- Juncus nodosus L. var. nodosus
- Knotty brake 1876-1913 (5, 92, 158)
- Dryopteris filix-mas (L.) Schott [also reported as: Aspidium filix mas ]
- Knotty-leaf rush [Knotty-leaved rush] 1923 (156)
- Juncus acuminatus Michx.
- Knotweed [Knot-weed]
- 1900-Present (1, 4, 50, 82, 93, 106, 109, 158)
- Polygonum L. [also reported as: Polygonum (Tourn.) L. ]
- 1986 (4)
- Polygonum achoreum Blake
- 1986 (4)
- Polygonum arenastrum Jord. ex Boreau
- 1894-1986 (4, 125, 129)
- Polygonum aviculare L.
- 1986 (4)
- Polygonum bellardii All. [reported as: Polygonum neglectum Besser ]
- 1986 (4)
- Polygonum buxiforme Small
- 1986 (4)
- Polygonum douglasii Greene
- 1986 (4)
- Polygonum douglasii Greene ssp. johnstonii (Munz) Hickman [reported as: Polygonum sawatchense Small ]
- 1932-1986 (4, 85)
- Polygonum ramosissimum Michx.var. ramosissimum [also reported as: Polygonum exsertum Small ]
- 1986 (4)
- Polygonum tenue Michx.
- 1937 (122) TX
- Polygonum virginianum L.
- Knotweed leaf-flower [Knotweed leafflower] 1942 (155)
- Phyllanthus polygonoides Nutt.
- Knotwort [Knot-wort] 1900 (158)
- Polygonum aviculare L.
- Knutt (Swedish) 1886 (110)
- Spergula arvensis L.
- Knyl-hafre (Swedish) 1879 (46)
- Arrhenatherum elatius (L.) Beauv. ex J. Presl & C. Presl [reported as: Arrhenatherum avenaceum Beauv. ]
- Kochia
- 1936 (93) Neb
- Kochia Roth
- 1913-1986 (3, 4, 5, 93, 97)
- Kochia scoparia (L.) Schrad. [also reported as: Kochia scoparia (L.) Roth ]
- Koeleria
- 1942 (155)
- Koeleria Pers.
- 1901-1907 (56, 72)
- Koeleria macrantha (Ledeb.) J.A. Schultes [also reported as: Koeleria cristata (L.) Pers. ]
- Koeler's grass 1852-1958 (5, 116, 119, 163)
- Koeleria macrantha (Ledeb.) J.A. Schultes [also reported as: Koeleria cristata (L.) Pers. ]
- Koeskatoma nuts 1827 (33)
- Carya alba (L.) Nutt. ex Ell.
- Kohlrabi [Kohl-rabi] 1919 (107)
- Brassica L.
- Kohlsaatsöl (German) 1900 (158) seeds
- Brassica rapa L. var. rapa [reported as: Brassica campestris L. ]
- Kokbenognik keya (Chippewa, willow for making baskets) 1932 (105)
- Salix interior Rowlee [reported as: Salix longifolia Muhl. ]
- Kokum 1882 (48) KS
- Phytolacca americana L. var. americana [reported as: Phytolacca decandra L. ]
- Kolicwurzel (German) 1900 (158)
- Apocynum androsaemifolium L.
- Kombu 1942 (155)
- Euphorbia L. [reported as: Arthrothamnus Klotzsch & Garcke ]
- Königskerze (German) 1892-1900 (6, 158)
- Verbascum thapsus L.
- Konjibik (Chippewa) 1932 (105)
- Ceanothus americanus L.
- Konung Salomons ljusstake (Swedish) 1879 (46)
- Lepidium campestre (L.) Aiton f. [reported as: Lepidium campestre (L.) R. Br. ]
- Kooyah 1850-1896 (28, 76, 103) CA Northwest Indians
- Valeriana edulis Nutt.
- Korean clover 1977-Present (3, 50)
- Kummerowia stipulacea (Maxim.) Makino [also reported as: Lespedeza stipulacea Maxim. ]
- Korean lespedeza 1942-1986 (4, 155)
- Kummerowia stipulacea (Maxim.) Makino [also reported as: Lespedeza stipulacea Maxim. ]
- Korn Rade (German) 1892 (6)
- Agrostemma githago L.
- Kornblume (German) 1900 (158)
- Centaurea cyanus L.
- Kosjaejb (Arabia) 1886 (110)
- Panicum miliaceum L.
- Kourfa kara-or (Arabic and Tartar) 1886 (110)
- Portulaca oleracea L.
- Kouril-skoi-tchai (Siberia "Kurile tea") 1919 (107)
- Dasiphora floribunda (Pursh) Kartesz [reported as: Potentilla fruticosa L., Dasiphora fruticosa (L.) Rydb. ]
- Kouton (Himalayas) 1886 (110)
- Fagopyrum esculentum Moench [reported as: Polygonum fagopyrum L. ]
- Kraftwurzel (German) 1892 (6)
- Possibly, Panax quinquefolius L. [reported as: Aralia quinquefolia Gray ]
- Krameria 1900-1942 (155, 158)
- Krameria L.
- Kranewett (German) 1900 (158)
- Juniperus communis L.
- Krauseminze (German) 1900 (158)
- Mentha ×piperita L. [aquatica × spicata] [reported as: Mentha crispa L. ]
- Krauser Ampfer (German) 1892 (6)
- Rumex crispus L.
- Kraut weed 1893 (74) WV
- Sinapis arvensis L. [reported as: Brassica sinapistrum Boiss. ]
- Krautweed [Kraut weed, Kraut-weed]
- 1913-1923 (5, 156)
- Raphanus raphanistrum L.
- 1900-1929 (5, 157)
- Sinapis arvensis L.
- Kreen 1886 (110)
- Armoracia rusticana P.G. Gaertn., B. Mey. & Scherb. [reported as: Cochlearia armoracia L. ]
- Krenai (Lithuania) 1886 (110)
- Armoracia rusticana P.G. Gaertn., B. Mey. & Scherb. [reported as: Cochlearia armoracia L. ]
- Kreusel (German) 1886 (110)
- Portulaca oleracea L.
- Kreuzdorn (German) 1892-1900 (6, 158)
- Rhamnus cathartica L. [also reported as: Rhamnus catharticus L. ]
- Kreuzkraut (German) 1900 (158)
- Senecio vulgaris L.
- Krommunda (Modern Greek) 1886 (110)
- Allium cepa L.
- Krommuon 300BC (110) Theophrastus
- Allium cepa L.
- Kropfklette (German) 1900 (158)
- Xanthium strumarium L.
- Krunslauk (Esthonian) 1886 (110)
- Allium sativum L.
- Ksapitahako (Pawnee, to whirl in the hand) 1919 (37)
- Echinacea angustifolia DC.
- Ksho-hin (Winnebago, prairie chicken feather) 1830 (37)
- Typha latifolia L.
- Ku (Ancient China) (46)
- Setaria italica (L.) Beauv. [reported as: Panicum italicum L. ]
- Kudzu or Kudzu vine [Kudzu-vine]
- 1986-Present (4, 50)
- Pueraria DC.
- 1949-Present (4, 50, 109)
- Pueraria montana (Lour.) Merr. var. lobata (Willd.) Maesen & S. Almeida
- Kudzu-bean [Kudzubean]
- 1942 (155)
- Pueraria DC.
- 1923 (138)
- Pueraria montana (Lour.) Merr. var. lobata (Willd.) Maesen & S. Almeida [reported as: Pueraria thunbergiana Benth. ]
- Kuhnia 1930 (82) IA
- Brickellia Ell. [reported as: Kuhnia L. ]
- Kumlien aster 1942 (155)
- Symphyotrichum oblongifolium (Nutt.) Nesom [reported as: Aster kumleinii Fries ]
- Kummel 1919 (107)
- Carum carvi L.
- Kummerowia Present (50)
- Kummerowia Schindl.
- Kungû (Sanskrit) (46)
- Setaria italica (L.) Beauv. [reported as: Panicum italicum L. ]
- Kurbs (German) (gourd) 1919 (107)
- Cucurbita pepo L.
- Kurj-noha (Bohemian) 1886 (110)
- Portulaca oleracea L.
- Kurza noka (Polish) 1886 (110)
- Portulaca oleracea L.
- Kus apaaru kaaruts (Pawnee, cherry-sitting-hiding) 1919 (37)
- Prunus pumila L. var. besseyi (Bailey) Gleason [reported as: Prunus besseyi Bailey ]
- Kussander 1828 (7)
- Ipomoea pandurata (L.) G.F.W. Mey. [reported as: Convolvulus panduratus ]
- Ku'-we (Delaware) 1855 (132)
- Pinus L.
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