| Family Asteraceae (click for list of genera only) | |
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Cirsium Mill.
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plume thistle, thistle (DISTRIBUTION MAP GALLERY of SPECIES) | |
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Cirsium altissimum (L.) Spreng.
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tall thistle, wood thistle Carduus altissimus L. Cirsium altissimum (L.) Spreng. var. biltmoreanum Petr. Cirsium iowense (Pammel) Fernald Cirsium X iowense (Pammel) Fernald (pro sp.) Cnicus iowensis Pammel |
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Cirsium altissimum (L.) Spreng. X C. discolor (Muhl. ex Willd.) Spreng.
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Cirsium discolor (Muhl. ex Willd.) Spreng. X C. altissimum (L.) Spreng. | |
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Cirsium arvense (L.) Scop.
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Canada thistle, creeping thistle, field thistle Carduus arvensis (L.) Robson Cirsium arvense (L.) Scop. f. albiflorum (E.L.Rand & Redfield) Ralph Hoffm. Cirsium arvense (L.) Scop. var. argenteum (Vest) Fiori Cirsium arvense (L.) Scop. var. horridum Wimm. & Grab. Cirsium arvense (L.) Scop. var. integrifolium Wimm. & Grab. Cirsium arvense (L.) Scop. var. mite Wimm. & Grab. Cirsium arvense (L.) Scop. var. vestitum Wimm. & Grab. Cirsium incanum (Gmel.) Fisch. Cirsium setosum (Willd.) Besser ex M.Bieb. Cnicus arvensis (L.) Roth Cnicus arvensis (L.) Roth f. albiflorum E.L.Rand & Redfield Serratula arvensis L. |
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Cirsium canescens Nutt.
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[Excluded] Platte thistle, prairie thistle Carduus undulatus Nutt. var. canescens (Nutt.) Porter Cirsium nebraskense (Britton) Lunell Cirsium nelsonii (Pammel) Petr. Cirsium plattense (Rydb.) Cockerell ex Daniels |
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Cirsium discolor (Muhl. ex Willd.) Spreng.
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field thistle, pasture thistle, prairie thistle Carduus discolor (Muhl. ex Willd.) Nutt. Cirsium discolor (Muhl. ex Willd.) Spreng. f. albiflorum (Britton) House |
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Cirsium discolor (Muhl. ex Willd.) Spreng. X C. muticum Michx.
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Cirsium muticum Michx. X C. discolor (Muhl. ex Willd.) Spreng. | |
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Cirsium flodmanii (Rydb.) Arthur
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Flodman's thistle, prairie thistle Carduus oblanceolatus Rydb. Cirsium nebraskense (Britton) Lunell var. discissum Lunell Cirsium oblanceolatum (Rydb.) K.Schum. |
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Cirsium hillii (Canby) Fernald
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Hill's thistle, hollow-rooted thistle, prairie thistle Cirsium pumilum (Nutt.) Spreng. subsp. hillii (Canby) R.J.Moore & Frankton Cirsium pumilum (Nutt.) Spreng. var. hillii (Canby) B.Boivin Cnicus hillii Canby |
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Cirsium muticum Michx.
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swamp thistle Carduus muticus (Michx.) Pers. Cirsium bigelovii DC. Cirsium muticum Michx. f. lactiflorum Fernald Cirsium muticum Michx. var. monticola Fernald Cirsium muticum Michx. var. subpinnatifidum (Britton) Fernald |
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Cirsium ochrocentrum A.Gray
[Excluded] yellow-spine thistle Cnicus ochrocentrus (A.Gray) A.Gray | |
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Cirsium palustre (L.) Scop.
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European swamp thistle, marsh thistle Cnicus palustris (L.) Willd. |
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Cirsium pitcheri (Torr. ex Eaton) Torr. & A.Gray
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dune thistle, sand dune thistle Cnicus pitcheri Torr. ex Eaton |
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Cirsium undulatum (Nutt.) Spreng.
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wavy-leaved thistle Carduus helleri Small Carduus megacephalus (A.Gray) Nutt. Carduus undulatus Nutt. Cirsium helleri (Small) Cory Cirsium megacephalum (A.Gray) Cockerell Cirsium ochrocentrum A.Gray var. helleri (Small) Petr. Cirsium undulatum (Nutt.) Spreng. var. megacephalum (A.Gray) Fernald Cirsium undulatum (Nutt.) Spreng. var. undulatum Cnicus undulatus (Nutt.) A.Gray Cnicus undulatus (Nutt.) A.Gray var. megacephalus A.Gray |
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Cirsium vulgare (Savi) Ten.
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bull thistle Carduus lanceolatus L. Carduus vulgaris Savi Cirsium lanceolatum (L.) Scop., non Hill Cirsium lanceolatum (L.) Scop. var. hypoleucum DC. |
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