Historical Common Names of Great Plains Plants: O

O pepon 1919 (107) Latin Cucumis melo L. Oak 1814-Present (1, 4, 7, 10, 40, 50, 82, 92, 93, 106, 109, 155, 158, 167) Quercus L. [also reported as: Quercus (Tourn.) L.] Oak fern [Oak-fern, Oakfern] 1932 (1) Dryopteris Adans. [reported as: Phegopteris (Presl) Fee] 1942-1949 (109, 155) Gymnocarpium disjunctum (Rupr.) Ching [also reported as: Dryopteris disjuncta (Lebed.) Morton] 1879-1977 (3, 5, 46, 72, 131, 138, 156) Gymnocarpium dryopteris (L.) Newman [also reported as: Dryopteris dryopteris (L.) Britton, Dryopteris linnaeana C. Christens., Polypodium dryopteris] Oak mistletoe Present (50) Phoradendron leucarpum (Raf.) Reveal & M.C. Johnston Oak-leaf datura [Oakleaf datura] 1942 (155) Datura quercifolia Kunth Oak-leaf goosefoot [Oakleaf goosefoot, Oak-leaved goosefoot] 1899-Present (3, 4, 5, 50, 72, 93, 131, 155, 156) Chenopodium glaucum L. Oak-leaf thorn-apple [Oak leaf thorn apple] 1937-1986 (4, 124) TX Datura quercifolia Kunth Oakleech 1942 (155) Aureolaria Raf. Oak-of-Cappadocia [Oak of Cappadocia] 1671 (46) Josselyn Ambrosia artemisiifolia L. [reported as: Ambrosia artemisaefolia L.] Oak-of-Jerusalem [Oak of Jerusalem, Oak of Hierusalem] 1876 (92) Chenopodium ambrosioides L. var. ambrosioides [reported as: Chenopodium anthelminticum L.] 1671-1840 (46) deliberately introduced by colonists by 1671, Josselyn Chenopodium botrys L. Oak-thistle [Oakthistle] 1923 (156) Onopordum acanthium L. [reported as: Onopordon acanthium L.] Oat [Oats] 1885-Present (50, 87, 93, 138, 155, 158) Avena L. [also reported as: Avena (Tourn.) L.] 1671-1949 (5, 19, 46, 52, 53, 54, 67, 85, 92, 107, 109, 119, 138, 152) Avena sativa L. Oat grass [Oatgrass, Oat-grass] 1923-Present (50, 93, 138, 155) Arrhenatherum Beauv. 1901-1932 (5, 56, 68, 85, 92) Arrhenatherum elatius (L.) Beauv. ex J. Presl & C. Presl [also reported as: Arrhenatherum avenaceum Beauv.] 1907 (72) IA Possibly,Arrhenatherum elatius (L.) Beauv. ex J.& K. Presl var. elatius [reported as: Avena elatius (L.) Beauv.] 1818-1884 (10, 87) Avena L. 1876 (92) Avena sativa L. Present (50) Danthonia DC. Present (50) Trisetum Pers. Oat-thistle [Oat thistle] 1900?-1913 (5, 158) Onopordum acanthium L. [also reported as: Onopordon acanthium L.] Obedient plant [Obedient-plant] 1923-1986 (4, 156) Physostegia Benth. 1933-1986 (3, 4, 127) Physostegia parviflora Nutt. ex Gray 1900-Present (5, 50, 156, 158) Physostegia parviflora Nutt. ex Gray [also reported as: Dracocephalum virginianum L.] Present (50) Physostegia virginiana (L.) Benth. ssp. praemorsa (Shinners) Cantino Present (50) Physostegia virginiana (L.) Benth. ssp. virginiana Obier (French) 1900(158) Viburnum opulus L. Oblong bluebells Present (50) Mertensia oblongifolia (Nutt.) G. Don Oblong woodsia 1913 (5) Woodsia ilvensis (L.) R. Br. Oblong-leaf aster [Oblong-leaved aster] 1930 (82) IA Symphyotrichum oblongifolium (Nutt.) Nesom [reported as: Aster oblongifolius Nutt.] Oblong-leaf bluebells [Oblongleaf bluebells] 1942 (155) Mertensia oblongifolia (Nutt.) G. Don Oblong-leaf bumelia [Oblong-leaved bumelia] 1857 (20) Sideroxylon lanuginosum Michx.ssp. oblongifolium (Nutt.) T.D. Pennington [reported as: Bumelia oblongifolia Nutt.] Oblong-leaf chenopod [Oblong-leaved chenopod] 1899 (131) SD Chenopodium desiccatum A. Nels. [reported as: Chenopodium leptophyllum oblongifolium S. Wats.] Oblong-leaf milkweed [Oblong-leaved milkweed] 1913-1937 (5, 97) Asclepias viridis Walt. [also reported as: Asclepiodora viridis (Walt.) Gray] Oblong-leaf orach [Oblongleaf orache] Present (50) Atriplex oblongifolia Waldst. & Kit. Oblong-leaf primrose [Oblong-leaved primrose] 1913-1937 (5, 97) Calylophus hartwegii (Benth.) Raven ssp. pubescens (Gray) Towner & Raven [also reported as: Galpinsia interior Small.] Oblong-leaved gentian 1913 (5) Gentiana affinis Griesb. [reported as: Dasystephana affinis (Griseb.) Rydb.] Obolaria 1879 (46) Linnaea borealis L. Obovate beakgrain Present (50) Diarrhena obovata (Gleason) Brandenburg Obtuse field-cress [Obtuse fieldcress] 1942 (155) Rorippa teres (Michx.) R. Stuckey [reported as: Rorippa obtusa (Nutt.) Britton] Obtuse sedge Present (50) Carex obtusata Lilj. Obtuse spike-rush 1903 (66) Eleocharis obtusa (Willd.) J.A. Schultes Obtuse-flower panicum [Obtuse-flowered panicum] 1884 (87) Panicum obtusum H.B.K. Occident frogbit [Occident-frogbit] 1942 (155) Limnobium Rich. Occidental plane tree 1820 (38) Platanus occidentalis L. Ocimoides noctiflorum 1541 (46) Camerarius Silene noctiflora L. O'ckinigi'kweäni'bic (Chippewa, young woman's leaf) 1928 (40) Tanacetum vulgare L. October beauty 1878 (86) common name suggested by Thomas Meehan Stenosiphon linifolius (Nutt. ex James) Heynh. [reported as: Stenosiphon virgatus Spach] October ladies'-tresses [October ladies' tresses] Present (50) Spiranthes ovalis Lindl. Oda'tagago'minaga'wûnj (Chippewa) 1928 (40) Rubus occidentalis L. Ode'iminidji'bik (Chippewa, heart berry root) 1928 (40) Fragaria virginiana Duchesne Odessa tamarix 1923 (138) Tamarix ramosissima Ledeb. [reported as: Tamarix odessana] Odiga'dimanido (Chippewa) 1928 (40) Possibly,Ceanothus herbaceus Raf. [reported as: Ceanothus ovatus Desf. ] Odji'biknamûn' (Chippewa) 1928 (40) Lithospermum caroliniense (Walt. ex J.F. Gmel.) MacM. [reported as: Lithospermum carolinense (Walt.) MacM. ] Odjici'gomi n (Chippewa) 1928 (40) Lactuca canadensis L. Odoriferous grape 1840 (19) Vitis riparia Michx. Officinal marshmallow [Officinal marsh-mallow] 1768 (165) Althaea officinalis L. Ofizy 1879 (46) Zea mays L. Ogal or ogla (Himalayas) 1886 (110) Fagopyrum esculentum Moench [reported as: Polygonum fagopyrum L.] Ogaressa (Huron) 1919 (107) Phaseolus vulgaris L. O'gima'wûck (Chippewa, chief medicine) 1928 (40) Artemisia dracunculus L. [reported as: Artemisia dracunculoides Pursh] Ogini'minaga'wûnj (Chippewa, rose berries) 1928 (40) Rosa L.[reported as: Rosa (Tourn.) L.] O'gite'bug 1928 (40) Caltha palustris L. Ogwis'simaün (Chippewa) 1928 (40) Cucurbita pepo L. Ohio buckeye 1857-Present (2, 5, 13, 15, 20, 49, 50, 53, 57, 58, 65, 71, 72, 95, 97, 106, 109, 113, 138, 155, 156, 157, 158) Aesculus glabra Willd. [reported as: Pavia ohioensis] Present (50) Aesculus glabra Willd. var. arguta (Buckl.) B.L. Robins. Ohio horsemint [Ohio horse-mint] 1900(158) Blephilia Raf. 1913-1986 (4, 5, 156) Blephilia ciliata (L.) Benth. [also reported as: Blephilia ciliata (L.) Raf.] 1929 (157) Blephilia hirsuta (Pursh) Benth. Ohio spiderwort 1918-1970 (121) Tradescantia ohiensis Raf. Oignon commun (French) 1900(158) Allium cepa L. Oilnut [Oil nut, Oil-nut] or Oilnut tree [Oil nut tree, Oil-nut tree] 1892-1929 (5, 6, 49, 78, 92, 156, 157, 158) Juglans cinerea L. Oilseed [Oil seed, Oil-seed] or Oilseed plant [Oil-seed plant] 1913-1923 (5, 156) Camelina sativa (L.) Crantz Oja'cidji'bik (Chippewa, slippery root) 1928 (40) Chamerion angustifolium (L.) Holub ssp. angustifolium [reported as: Epilobium angustifolium L.] Ojig'imin (Chippewa, fisher berry) 1928 (40) Polygonum punctatum Ell. O'kadak' (Chippewa) 1928 (40) Aralia racemosa L. Okarini pisten (Sioux) 1905 (101) MT Monarda fistulosa L. ssp. fistulosa var. mollis (L.) Benth. [reported as: Monarda scabra Beck] Okindgier (Roanoke) 1919 (107) Phaseolus vulgaris L. Oklahoma beardtongue Present (50) Penstemon oklahomensis Pennell Oklahoma evening-primrose [Oklahoma evening primrose] 1986-Present (4, 50) Oenothera macrocarpa Nutt. ssp. oklahomensis (J.B.S. Norton) Wagner Oklahoma hackberry 1942 (155) Celtis laevigata Willd. var. reticulata (Torr.) L. Benson [reported as: Celtis reticulata Torr. var. vestita Sargent] Oklahoma persimmon 1942 (155) Diospyros virginiana L. [reported as: Diospyros virginiana L. var. platycarpa, Dioscorea batatas Sargent] Oklahoma phlox Present (50) Phlox oklahomensis Wherry Oklahoma plum 1942-Present (3, 4, 50, 155) Prunus gracilis Engelm. & Gray Oklahoma primrose 1913-1937 (5, 97) Oenothera macrocarpa Nutt. ssp. oklahomensis (J.B.S. Norton) Wagner [also reported as: Megapterium oklahomense Norton] Oklahoma sedge 1942-Present (50, 155) Carex oklahomensis Mack Olba or oloa (Basque) 1886 (110) Avena sativa L. Old Amy root 1892 (6) Apocynum cannabinum L. Old English poplar 1900-1923 (5, 156, 158) Populus nigra L. Old fog 1894 (75) Bromus ciliatus L. 1885-1903 (66, 75, 90) Danthonia spicata (L.) Beauv. ex Roemer & J.A. Schultes Old lady's bonnet 1923 (156) Possibly, Mertensia virginica (L.) Pers. ex Link [reported as: Mertensia virginica (L.) DC.] Old man's flannel [Old-man's flannel] 1900?-1929 (5, 69, 157, 158) Verbascum thapsus L. Old plainsmen 1977-1986 (3, 4) Hymenopappus scabiosaeus L'Her. var. corymbosus (Torr. & Gray) B.L. Turner Old Robert's root 1876 (92) Packera obovata (Muhl. ex Willd.) W.A. Weber & A. Löve [reported as: Senecio obovatus] Old Virginia 1913-1923 (5, 156) Symphyotrichum lateriflorum (L.) A.& D. Löve var. lateriflorum [also reported as: Aster hirsuticaulis Lindl., Aster lateriflorus (L.) Britton] Old Virginia stickweed [Old Virginia stick-weed] 1900(158) Symphyotrichum lateriflorum (L.) A.& D. Löve var. lateriflorum [reported as: Aster hirsuticaulis Lindl.] Old white top 1894-1913 (5, 75) Holcus lanatus L. [also reported as: Nothoholcus lanatus (L.) Nash] Old witch grass [Old witch-grass, Old-witch-grass] 1852-1938 (2, 5, 11, 45, 56, 62, 80, 87, 90, 92, 94, 111, 119, 129, 143, 163) Panicum capillare L. Old-field balsam [Old field balsam] 1892-1923 (5, 6, 49, 73, 92, 156, 157) Pseudognaphalium obtusifolium (L.) Hilliard & Burtt ssp. obtusifolium [also reported as: Gnaphalium polycephalum Michx., Gnaphalium obtusifolium L.] Old-field cinquefoil 1977-1986 (3, 4) Potentilla simplex Michx. Old-field clover [Old field clover] 1900-1923 (5, 156, 158) Trifolium arvense L. Old-field common juniper [Oldfield common juniper]1942 (155) Juniperus communis L. var. depressa Pursh Old-field goldenrod [Oldfield goldenrod] 1923 (138) Solidago nemoralis Aiton Old-field milkvine [Oldfield milkvine] Present (50) Matelea decipiens (Alex.) Woods. Old-field sweet 1900-1913 (5, 158) Symphyotrichum lateriflorum (L.) A.& D. Löve var. lateriflorum [also reported as: Aster hirsuticaulis Lindl.] Old-field toadflax [Oldfield toadflax] 1942-1986 (4, 155) Nuttallanthus canadensis (L.) D.A. Sutton [also reported as: Linaria canadensis (L.) Dumort, Linaria canadensis (L.) Dumort var. canadensis] 1977 (3) Nuttallanthus texanus (Scheele) D.A. Sutton [reported as: Linaria canadensis (L.) Dumort var. texana (Scheele) Pennell] Old-field wheat [Old field wheat] 1923 (156) Symphyotrichum lateriflorum (L.) A.& D. Löve var. lateriflorum [reported as: Aster lateriflorus (L.) Britton] Old-ladies'-clothes-pins [Old ladies' clothes-pin, Old-ladies clothes pins] 1896-1923 (5, 76, 156) Bidens frondosa L. Old-maid's pink [Old maid's pink] 1892-1929 (5, 64, 73, 92, 157, 158) Saponaria officinalis L. Old-maid's-bonnets 1900(158) Lupinus L. Old-maid's-breastpin [Old maid's breastpin] 1894 (75) Plymouth O Coreopsis L. Old-maid's-nightcap [Old maid's nightcap, Old maid's night-caps, Old-maid's night-cap, Old-maid's-night-cap] 1896-1929 (64, 76, 156, 157, 158) Geranium maculatum L. Old-maid's-pink [Old maid's pink, Old maid pink, Old-maid's pink] 1892-1929 (5, 71, 73, 156, 157, 158) Agrostemma githago L. [also reported as: Lychnis githago] Old-maid's-root [Old maid's root] 1913-1923 (5, 156) Aralia racemosa L. Old-man [Old man] 1892-1929 (5, 57, 73, 92, 107, 156, 157, 158) IL OH, for aphrodisiac qualitites or use in love divinations Artemisia abrotanum L. Old-man wormwood [Oldman wormwood] 1942 (155) Artemisia abrotanum L. Old-man-in-the-Spring Present (50) Senecio vulgaris L. Old-man's-pepper [Old man's pepper] 1900-1929 (69, 156, 157, 158) Achillea millefolium L. Old-man's-root [Old man's root] 1896-1929 (64, 75, 76, 156, 157, 158) Aralia racemosa L. Old-man's-whiskers [Old man's whiskers] 1932 (1) Clematis L. [reported as: Viorna Reichnb.] 1932 (1) Geum L. [reported as: Sieversia Willd.] Present (50) Geum triflorum Pursh Old-pasture blue grass [Oldpasture bluegrass] Present (50) Poa saltuensis Fern. & Wieg. Old-sow 1900(158) Anaphalis margaritacea (L.) Benth. & Hook Old-woman [Old woman] 1892 (73) Artemisia L. 1900-1929 (156, 157, 158) Artemisia absinthium L. Oleaster 1818-1986 (2, 4, 10) Elaeagnus L. 1910-1949 (82, 106, 107, 109, 135) Elaeagnus angustifolia L. [also reported as: Elaeagnus hortensis L.] Ollick 1900(158) Allium porrum L. Olney's bulrush [Olney bulrush] 1913-1942 (5, 155) Fimbristylis annua (All.) R. & S. [also reported as: Scirpus olneyi Gray] Olney's rush 1903 (66) Fimbristylis annua (All.) R. & S. [reported as: Scirpus olneyi Gray] Omnica (Lakota) 1918?-1970? (121) Phaseolus vulgaris L. Omnica hu (Lakota) 1918?-1970? (121) Strophostyles leiosperma (Torr. & Gray) Piper O'mûkiki'bûg (Chippewa, frog leaf) 1928 (40) Plantago major L. Onagre (French) 1892-1900(6, 158) Oenothera biennis L. [also reported as: Onagra biennis (L.) Scop.] Oneberry [One berry, One-berry] 1900-1923 (5, 156, 158) Celtis occidentalis L. One-blade [One blade] 1900-1913 (5, 158) Maianthemum canadense Desf. [also reported as: Unifolium canadense (Desf.) Greene] One-flower 1937 (122) TX Orobanche uniflora L. [reported as: Orobanche uniflora L. var. purpurea (Heller) Munz] One-flower broomrape [One-flowered broom-rape Oneflowered broomrape] 1878-Present (50, 5, 86, 93, 97, 156, 157, 158) Orobanche uniflora L. [also reported as: Aphyllon uniflorum (L.) Torr. & Gray, Thalesia uniflora (L.) Britton] One-flower cancer-root [One-flowered cancerroot, one-flowered cancer-root] 1923-1977 (3, 156) Orobanche uniflora L. One-flower flatsedge [Oneflower flatsedge] 1942-Present (50, 155) Cyperus retroflexus Buckl. [also reported as: Cyperus uniflorus T. & H.] One-flower horehound [One flower horehound] 1986 (4) Lycopus uniflorus Michx. One-flower pipsissewa [One-flowered pipsissewa] 1870 (103) Moneses uniflora (L.) Gray One-flower pyrola [One-flowered pyrola] 1900-1923 (156, 158) Moneses uniflora (L.) Gray One-flower wintergreen [One-flowered wintergreen] 1900?-1986 (4, 5, 85, 156, 158) Moneses uniflora (L.) Gray [also reported as: Moneses uniflora (L.) Gray, Pyrola uniflora L.] One-glume grass [One glumed grass] 1876 (92) Panicum L. [reported as: Monachne] One-leaf [One leaf] 1900-1913 (5, 158) Maianthemum canadense Desf. [also reported as: Unifolium canadense (Desf.) Greene] One-o'clock 1900-1929 (64, 69, 156, 157, 158) Taraxacum officinale G.H. Weber ex Wiggers One-row yellow-cress [Onerow yellowcress] Present (50) Rorippa microphylla (Boenn. ex Reichenb.) Hyl. ex A.& D. Löve One-scale spike-rush [Onescale spikerush] Present (50) Eleocharis uniglumis (Link) J.A. Schultes One-seed bur-cucumber [Oneseed burr-cucumber, One-seeded bur cucumber, One-seeded bur-cucumber] 1904 (149) NM Sicyos L. 1899-Present (5, 46, 50, 63, 72, 92, 93, 97, 106, 122, 156, 157, 158) Sicyos angulatus L. One-seed croton [One-seeded croton] 1977-1986 (3, 4) Croton monanthogynus Michx. One-seed cucumber [One-seeded cucumber] 1900?-1930 (82, 158) Sicyos L. 1876-1879 (46, 92) Sicyos angulatus L. One-seed honey locust [One-seeded honey locust] 1821 (12) Gleditsia aquatica Marsh. [reported as: Gleditsia monosperma] One-seed juniper [Oneseed juniper, One-seeded juniper] 1937-Present (3, 4, 50, 112, 155) Juniperus monosperma (Engelm.) Sarg. One-sided penstemon 1878 (86) Penstemon secundiflorus Benth. One-sided wintergreen 1840-1986 (3, 4, 5, 19, 72, 85, 95, 131, 156) Orthilia secunda (L.) House [also reported as: Pyrola secunda L.] One-spike danthonia [Onespike danthonia] Present (50) Danthonia unispicata (Thurb.) Munro ex Macoun Onion, common name from union because bulb never throws off any offsets 1814-Present (1, 50, 93, 106, 109, 121, 148, 138, 155, 156, 167) Allium L. [also reported as: Allium (Tourn.) L.] 1886-1949 (49, 53, 92, 109, 110, 138, 158) Allium cepa L. 1919 (52) Allium sativum L. Onion dodder 1912 (62) IN Cuscuta gronovii Willd. ex J.A. Schultes Onion grass [Oniongrass, Onion-grass] 1913 (5) Arrhenatherum elatius (L.) Beauv. ex J. Presl & C. Presl 1942 (155) Melica L. 1852-Present (50, 122, 155, 163) TX Melica bulbosa Geyer ex Porter & Coult. Onion twitch 1913 (5) Arrhenatherum elatius (L.) Beauv. ex J. Presl & C. Presl Onmnicha (Dakota) 1919 (37) Phaseolus vulgaris L. Onobrychis 100 AD (110) Dioscorides & Pliny Onobrychis viciifolia Scop. [reported as: Hedysarum onobrychis L.] Ontario aster 1942 (155) Symphyotrichum ontarione (Wiegand) Nesom [reported as: Aster ontarionis Wiegand] Ontario lobelia 1923-Present (50, 138, 155) Lobelia kalmii L. [also reported as: Lobelia kalmi] Ontario poplar 1913-1923 (5, 156) Populus balsamifera L. Ontario violet 1942 (155) Viola sororia Willd. [reported as: Viola septentrionalis Greene] Onzhinzhintka (Dakota) 1919 (37) Onzhinzhintka-hu (Rose bush) Rosa arkansana Porter var. suffulta (Greene) Cockerell [reported as: Rosa pratincola Greene] Onsunkoju spapi (Lakota, possibly meaning dog-catcher) 1918?-1970? (121) Gaura coccinea Nutt. ex Pursh Onwahinjuntonpi (Lakota, tanning substance) 1918?-1970? (121) Erigeron annuus (L.) Pers. Ooma (Sanskrit) 1886 (110) Linum usitatissimum L. Oonopsis 1900(158) Oonopsis Nutt. [reported as: Oonopsis Greene] Oo-oon (Pima) 1855 (132) Zea mays L. Opelousas persicaria 1907-1913 (5, 72) IA Polygonum hydropiperoides Michx. [also reported as: Persicaria opelousana (Riddell) Small, Riddell ex Small] Openawk 1879 (46) Apios americana Medik. [reported as: Apios tuberosa Moench] Open-gowan [Open gowan] 1913-1929 (5, 157) Caltha palustris L. Open-woods ragwort [Openwoods ragwort] Present (50) Senecio rapifolius Nutt. Ople tree [Ople-tree] 1923? (156) obsolete by 1923 Viburnum opulus L. Opposite-leaf bahia [Oppositeleaf bahia] Present (50) Picradeniopsis oppositifolia (Nutt.) Rydb. ex Britton Opposite-leaf pondweed [Opposite-leaved pondweed] 1913 (5) Potamogeton pusillus L. ssp. pusillus [reported as: Potamogeton lateralis Morong p.p.] Opuntia 1900(158) Opuntia P. Mill. Orabauke 1610 (46) Cuscuta pentagona Engelm. var. pentagona [reported as: Cuscuta arvensis Beyrich.] Orach [Orache] 1828-1936 (1, 2, 4, 7, 93, 156) Neb, Old World annuals are known as orach Atriplex L. [also reported as: Atriplex (Tourn.) L.] 1919-1986 (4, 107, 109) Atriplex hortensis L. 1913 (80) IA Atriplex prostrata Bouchér ex DC. [reported as: Atriplex patula L. var. hastata (L.) Gray, Atriplex hastata sensu Aellen, non L.] 1923 (156) Atriplex subspicata (Nutt.) Rydb. [reported as: Atriplex patula L.] Orache-caraway [Orache caraway] 1840 (19) Arnoglossum atriplicifolium (L.) H.E. Robins. [reported as: Cacalia atriplicifolia L.] Orage 1900(158) Atriplex hortensis L. Orange apocynum 1892 (6) Asclepias tuberosa L. Orange arnica 1942 (155) Arnica fulgens Pursh Orange California poppy [Orange California-poppy] 1923 (138) Eschscholzia californica Cham. ssp. californica [reported as: Eschscholzia californica crocea] Orange day-lily [Orange daylily] 1923-Present (50, 156) Hemerocallis fulva (L.) L. Orange fameflower 1942-Present (50, 155) Talinum aurantiacum Engelm. Orange horse-gentian [Orange horsegentian, Orange horse gentian] 1923-1942 (155, 156) Triosteum aurantiacum Bickn. 1977 (3) Triosteum aurantiacum Bickn. var. aurantiacum Orange jewelweed 1900-1929 (157, 158) Impatiens capensis Meerb. [also reported as: Impatiens biflora Walt.] Orange milkweed [Orange milkweed] 1892-1929 (6, 64, 156, 157, 158) Asclepias tuberosa L. Orange mustard 1896-1923 (5, 76, 156, 158) CA Erysimum capitatum (Dougl. ex Hook.) Greene var. capitatum [also reported as: Cheirinia aspera (DC..) Britton, Erysimum asperum (Nutt.) DC.] Orange peppermint 1942 (155) Mentha aquatica L. [reported as: Mentha piperita L. ssp. citrata (Ehrh.) Briq.] Orange puccoon 1923 (156) Lithospermum canescens (Michx.) Lehm. Orange sunflower 1923 (156) Heliopsis helianthoides (L.) Sweet var. scabra (Dunal) Fern. [reported as: Heliopsis scabra Dunal.] Orange swallow-wort [Orange swallowwort] 1828-1923 (5, 6, 7, 49, 53, 64, 92, 156, 158) Asclepias tuberosa L. Orange vine 1828-1876 (7, 92) Cucurbita pepo L. [also reported as: Cucurbita aurantia] Orange-cup lily [Orangecup lily] 1923-1949 (109, 138) Lilium philadelphicum L. Orange-flower horse-gentian [Orange-flowered horse gentian] 1986 (4) Triosteum aurantiacum Bickn. var. aurantiacum Orange-fruit horse-gentian [Orangefruit horse-gentian] Present (50) Triosteum aurantiacum Bickn. Present (50) Triosteum aurantiacum Bickn. var. aurantiacum Orange-grass 1900?-1936 (1, 93, 158) Hypericum L. [also reported as: Sarothra L.] Orange-lily pernel 1929 (157) Anagallis arvensis L. Orangeroot [Orange root, Orange-root] 1900-1923 (5, 64, 156, 158) Asclepias tuberosa L. Oranges 1879 (46) Diospyros virginiana L. Orchard barley 1901 (94) Possibly Elymus elymoides (Raf.) Swezey [reported as: Sitanion glaber J.G. Smith, Elymus glaber (J.G. Sm.) Burtt Davy, Sitanion glabrum J. G. Smith] Orchard grass [Orchard-grass, Orchardgrass] 1923-Present (50, 93, 138, 155) Dactylis L. 1818-Present (3, 5, 10, 11, 21, 45, 46, 50, 56, 66, 67, 68, 72, 85, 87, 88, 90, 92, 94, 109, 111, 119, 125, 129, 138, 140, 143, 155, 163) Dactylis glomerata L. Present (50) Dactylis glomerata L. ssp. glomerata 1913 (80) IA, misapplied Muhlenbergia mexicana (L.) Trin. 1913 (80) IA Muhlenbergia racemosa (Michx.) B.S.P. Orchis 1937 (124) TX Spiranthes L.C. Rich. Oregon American vetch 1942 (155) Vicia americana Muhl. ex Willd. ssp. americana [reported as: Vicia americana Muhl. ex Willd. var. oregana (Nutt.) A. Nels.] Oregon aster 1942 (155) Symphyotrichum eatonii (Gray) Nesom [reported as: Aster oregonus (Nutt.) Torr. & Gray] Oregon blue grass 1913 (5) Poa secunda J. Presl [reported as: Poa buckleyana Nash] Oregon cliff fern Present (50) Woodsia oregana D.C. Eat. Present (50) Woodsia oregana D.C. Eat. ssp. cathcartiana (B.L. Robins.) Windham Oregon fleabane 1923-1942 (138, 155) Erigeron speciosus (Lindl.) DC. Oregon gentian 1942 (155) Gentiana affinis Griesb. [reported as: Gentiana oregana Engelm. ex Gray] Oregon grape 1932 (1) Mahonia Nutt. 1905-1986 (3, 4, 101, 135, 153) Mahonia repens (Lindl.) G. Don [also reported as: Berberis repens Lindl., Odostemon repens (Lindl.) Cockerell] Oregon sunflower 1919 (107) Balsamorhiza sagittata (Pursh) Nutt. Oregon tobacco 1900?-1923 (5, 156, 158) Valeriana edulis Nutt. Oregon woodsia 1840-1986 (3, 4, 5, 19, 97, 131, 155) Woodsia oregana D.C. Eat. Orgre (French) 1900(158) Hordeum vulgare L. Oriental asperula Present (50) Asperula orientalis Boiss. & Hohen. Oriental cocklebur 1942 (155) Xanthium strumarium L. var. glabratum (DC.) Cronq. [reported as: Xanthium orientale L.] Oriental lady's-thumb [Oriental ladysthumb] Present (50) Polygonum buxiforme Small Present (50) Polygonum caespitosum Blume var. longisetum (de Bruyn) A.N. Steward Oriental oak 1937 (112) Neb Quercus muehlenbergii Engelm. [reported as: Quercus acuminata (Michx.) Houba] Oriental woodruff 1923-1942 (138, 155) Asperula orientalis Boiss. & Hohen. Origanum fistulosum Canadense 1629 (46) Cornuti Monarda fistulosa L. Orme (French) 1785 (8) Ulmus L. [reported as: Ulmus (Tourn.) L.] Orme à feuilles douces (French) 1785 (8) Ulmus americana L. [reported as: Ulmus mollifolia] Orme à grappe (French) 1857 (20) Ulmus thomasii Sargent [reported as: Ulmus racemosa D. Thomas] Orme à trois feuilles (French) 1785-1900(8, 158) Ptelea trifoliata L. Orme d'Amérique (French) 1785 (8) Ulmus americana L. Orme de Samaire a Trois Feuilles (French) 1892 (6) Ptelea trifoliata L. Orme fauve (French) 1900(158) Ulmus rubra Muhl. [reported as: Ulmus fulva Michx] Orme gras (Upper Louisiana) 1857 (20) Ulmus rubra Muhl. Ormes blans 1879 (46) Ulmus americana L. Orpine 1895-1932 (1, 2, 109) Sedum L. Orthilia Present (50) Orthilia Raf. Orthocarpus 1900(158) Orthocarpus Nutt. Ortie brulante (French) 1900(158) Urtica dioica L. Ortigo (French) 1900(158) Urtica dioica L. Orwisburg grape 1828 (7) Vitis riparia Michx. [reported as: Vitis dimidiata Raf.] Osaga'tigom' (Chippewa, tangled branches) 1928 (40) Osmorhiza claytonii (Michx.) C.B. Clarke Osage 1900(158) Maclura pomifera (Raf.) Schneid. [reported as: Toxylon pomiferum Raf.] Osage apple [Osage-apple] 1806-1923 (5, 33, 35, 92, 156, 158) William Clark Maclura pomifera (Raf.) Schneid. [also reported as: Maclura aurantiaca Nutt., Toxylon pomiferum Raf.] Osage false foxglove Present (50) Agalinis densiflora (Benth.) Blake Osage plumb 1806 (35) William Clark Prunus angustifolia Marsh. Osage-orange [Osage orange, Osageorange] 1900-1986 (4, 93, 109, 138, 155, 156, 158) Maclura Nutt. [also reported as: Toxylon Raf.] 1834-Present (1, 3, 4, 5, 14, 20, 34, 37, 38, 44, 50, 72, 78, 85, 92, 93, 97, 112, 121, 145, 138, 155, 158, 164) Maclura pomifera (Raf.) Schneid. [also reported as: Maclura aurantiaca Nutt., Toxylon pomiferum Raf.] Ósako (Pawnee) 1919 (37) Acer negundo L. Oschbe 1879 (46) Smilax glauca Walt. [reported as: Smilax sarsaparilla L.] Osidiwa (Pawnee) 1830 (37) Allium canadense L. var. mobilense (Regal) Ownbey [reported as: Allium mutabile Michx.] Osidiwa tsitschiks (Pawnee) 1830 (37) Allium canadense L. var. mobilense (Regal) Ownbey [reported as: Allium mutabile Michx.] Osier 1895-1949 (2, 109) Salix L. Osier willow [Osier-willow] 1900?-1923 (5, 156, 158) Salix interior Rowlee [also reported as: Salix fluviatilis Nutt., Salix longifolia Muhl.] Osmunda Present (50) Osmunda L. Osmund-the-waterman 1929 (157) Osmunda regalis L. Ostrich fern [Ostrich-fern, Ostrichfern] 1932-Present (1, 50, 109) Matteuccia Todaro [also reported as: Pteretis Raf.] 1840-Present (1, 2, 3, 4, 19, 50, 72, 131, 138, 155, 158) Matteuccia struthiopteris (L.) Todaro [also reported as: Onoclea struthiopteris (L.) Hoffmann, Pteretis nodulosa (Michx.) Nieuwl., Struthiopteris pennsylvanica W.] Ostrich-plume mustard [Ostrich plume mustard] 1949 (109) Brassica juncea (L.) Czern. [reported as: Brassica juncea (L.) Czern. var. crispifolia Bailey] Oswego tea 1834 (34) Monarda L. 1900-1929 (5, 93, 156, 157) misapplied Monarda fistulosa L. Otaheite mulberry 1913-1923 (5, 156) Broussonetia papyrifera (L.) L'Hér. ex Vent. [also reported as: Broussonetia papyrifera Vent., Papyrius papyrifera (L.) Kuntze] Othake 1942 (155) Gaillardia Foug. [reported as: Othake Raf.] 1977-Present (3, 50) Palafoxia sphacelata (Nutt. ex Torr.) Cory Othonna 1923-1942 (138, 155) Senecio L. [also reported as: Othonna L.] Ou Bonnet de Pretre (French) 1892 (6) Euonymus atropurpurea Jacq. [reported as: Euonymus atropurpureus Jacq.] Ougoufle (Louisiana) 1879-1919 (46, 107) Diospyros virginiana L. Ougoust (Western tribes) 1828 (7) Diospyros L. Ou'-in (Pima) 1855 (132) Zea mays L. Oui-pun'-go'k (Delaware) 1855 (132) Quercus L. Our Lady's bedstraw 1900 (158) Galium verum L. Our Lady's mint 1900-1923 (5, 62, 156, 158) Mentha spicata L. Our Lord's candles 1923 (156) Yucca filamentosa L. Oval-head sedge [Ovalhead sedge, Oval-headed sedge] 1903-1913 (5, 66) Carex cephalophora Muhl. ex Willd. 1942-1944 (139, 155) Carex microptera Mackenzie [also reported as: Carex festivella Mack.] Oval-leaf bladderpod [Oval leaved bladder pod, Oval-leaved bladder-pod] 1913-1986 (3, 4, 5, 93, 97) Lesquerella ovalifolia Rydb. ex Britton 1977 (3) Lesquerella ovalifolia Rydb. ex Britton ssp. ovalifolia Oval-leaf knotweed Present (50) Polygonum arenastrum Jord. ex Boreau Oval-leaf milkweed [Ovalleaf milkweed, Oval-leaved milkweed] 1899-Present (4, 5, 50, 72, 82, 131) Asclepias ovalifolia Dcne. Oval-leaf sedge Present (50) Carex cephalophora Muhl. ex Willd. Oval-shaped sedge 1907 (72) IA Carex cephalophora Muhl. ex Willd. Ova-ova 1876-1900(92, 158) Monotropa uniflora L. Ovate spike-rush [Ovate spike rush, Ovate spikerush] 1907-Present (5, 50, 72) Eleocharis ovata (Roth) Roemer & J.A. Schultes Ovate-leaf sagittaria [Ovate-leaved sagittaria] 1913-1937 (5, 97) Sagittaria platyphylla (Engelm.) J.G. Smith Overcup or Overcup oak [Over-cup oak] 1811-1923 (2, 10, 12, 19, 27, 156, 158, 164) Quercus macrocarpa Michx. Overcup white oak 1796-1857 (17, 12, 18, 20, 33) Quercus macrocarpa Michx. Ovesu (Russian) 1886 (110) Avena sativa L. Ovisu, ovesu, or ovsa (Ancient Slavic) 1886 (110) Avena sativa L. Owl-clover [Owl's-clover, Owl's clover, Owl clover, Owlclover] 1936-Present (50, 93, 155) Orthocarpus Nutt. 1932-1986 (1, 3, 4, 85) Orthocarpus luteus Nutt. Owl-fruit sedge [Owlfruit sedge] Present (50) Carex stipata Muhl. ex Willd. Present (50) Carex stipata Muhl. ex Willd. var. stipata Oxadaddy or Oxadoddy 1876-1929 (5, 92, 157, 158) Veronicastrum virginicum (L.) Farw. [also reported as: Leptandra virginica (L.) Nutt.] Oxalis 1923-1942 (138, 155) Oxalis L. Ox-eye [Oxeye] or Oxeye daisy [Oxeye daisy, Oxeyedaisy, Ox-eyed daisy] 1828-1929 (5, 7, 92, 156, 157, 158) Helenium autumnale L. 1923-1932 (1, 2, 80, 82, 156) Heliopsis Pers. 1923-1986 (4, 5, 156) Heliopsis helianthoides (L.) Sweet 1928 (40, 82) Heliopsis helianthoides (L.) Sweet var. scabra (Dunal) Fern. [also reported as: Heliopsis scabra Dunal.] 1932 (1) Leucanthemum P. Mill. [reported as: Leucanthemum (Tourn.) P. Mill.] 1840-Present (3, 4, 5, 19, 45, 49, 50, 53, 58, 62, 63, 72, 80, 82, 85, 92, 97, 106, 107, 109, 114, 122, 124, 138, 145, 155, 156, 158) Leucanthemum vulgare Lam.[also reported as: Chrysanthemum leucanthemum L., Chrysanthemum leucanthemum L. var. pinnatifidum Lecoq & Lamotte, Leucanthemum leucanthemum (L.) Rydb.] 1894-1900(75, 76, 158) MA, ME misapplied Rudbeckia hirta L. Oxeye chamomile [Ox-eye chamomile Oxeye camomile Ox-eye camomile] 1913-1923 (5, 156) Anthemis tinctoria L. Oxford weed 1913-1923 (5, 156) Cymbalaria muralis P.G. Gaertn., B. Mey. & Scherb. [also reported as: Cymbalaria cymbalaria (L.) Wettst., Linaria cymbalaria (L.) P. Mill.] Ox-tongue 1919-1986 (3, 4, 107, 156) Picris echioides L. Oyster plant [Oyster-plant, Oysterplant] 1932 (1) Tragopogon L. [reported as: Tragopogon (Tourn.) L.] 1899-1949 (5, 63, 72, 95, 97, 107, 109, 155, 158) Tragopogon porrifolius L. 1939 (146) MT Tragopogon pratensis L. Oyster-root [Oyster root] 1828 (7) Tragopogon L. [reported as: Tragopogon (Tourn.) L.] 1876-1923 (5, 92, 156, 158) Tragopogon porrifolius L. Ozaha 1879 (46) Vitis vulpina L. [reported as: Vitis cordifolia Michx.] Ozark bluestar Present (50) Amsonia illustris Woods. Ozark downy phlox 1942 (155) Phlox pilosa L. ssp. ozarkana (Wherry) Wherry Ozark dropseed Present (50) Sporobolus vaginiflorus (Torr. Gray) Wood var. ozarkanus (Fern.) Shinners Ozark grass [Ozarkgrass] 1942-Present (50, 155) Limnodea arkansana (Nutt.) L.H. Dewey Ozark milkvetch [Ozark milk vetch] 1986-Present (4, 50) Astragalus distortus Torr. & Gray Ozark phlox Present (50) Phlox pilosa L. ssp. ozarkana (Wherry) Wherry Ozark sundrops 1923-1942 (138, 155) Oenothera macrocarpa Nutt. ssp. macrocarpa [also reported as: Oenothera missouriensis Sims] Ozark violet 1942 (155) Viola viarum Pollard O'zawa'bigwûn (Chippewa, yellow flower) 1928 (40) Erysimum cheiranthoides L. O'zawa'bigwûn (Chippewa, yellow flower) 1928 (40) Solidago speciosa Nutt. var. rigidiuscula Torr. & Gray [reported as: Solidago rigidiuscula (Torr. & Gray) Porter] Oza'widji'bik (Chippewa, yellow root) 1928 (40) Rumex acetosella L. 1928 (40) Rumex crispus L. Ozi'sigo'bimic (Chippewa) 1928 (40) Salix L.

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