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Taxonomic exploration
Forbs & herbs
Forb-form herbaceous plants — wildflowers, broadleaved herbs, everything between grasses and shrubs.
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Showing 3,951–4,000 of 18,712.
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Circaea alpina L. CIALsmall enchanter's nightshade · Onagraceae - Circaea alpina L. ssp. alpina CIALAsmall enchanter's nightshade · Onagraceae
- Circaea alpina L. ssp. pacifica (Asch. & Magnus) P.H. Raven CIALP2small enchanter's nightshade · Onagraceae
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Circaea lutetiana L. CILUbroadleaf enchanter's nightshade · Onagraceae - Circaea lutetiana L. ssp. canadensis (L.) Asch. & Magnus CILUCbroadleaf enchanter's nightshade · Onagraceae
- Circaea ×intermedia Ehrh. (pro sp.) [alpina × lutetiana] CIIN4enchanter's nightshade · Onagraceae
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Cirsium altissimum (L.) Hill CIAL2tall thistle · Asteraceae -
Cirsium andersonii (A. Gray) Petr. CIANrose thistle · Asteraceae -
Cirsium andrewsii (A. Gray) Jeps. CIAN2Franciscan thistle · Asteraceae -
Cirsium arizonicum (A. Gray) Petr. CIAR3Arizona thistle · Asteraceae -
Cirsium arvense (L.) Scop. CIAR4Canada thistle · Asteraceae -
Cirsium barnebyi S.L. Welsh & Neese CIBABarneby's thistle · Asteraceae -
Cirsium brevifolium Nutt. CIBRPalouse thistle · Asteraceae -
Cirsium brevistylum Cronquist CIBR2clustered thistle · Asteraceae -
Cirsium calcareum (M.E. Jones) Wooton & Standl. CICA10Cainville thistle · Asteraceae -
Cirsium canescens Nutt. CICA11prairie thistle · Asteraceae - Cirsium canovirens (Rydb.) Petr. CICA6graygreen thistle · Asteraceae
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Cirsium carolinianum (Walter) Fernald & B.G. Schub. CICA7soft thistle · Asteraceae -
Cirsium centaureae (Rydb.) K. Schum. CICEfringed thistle · Asteraceae -
Cirsium chellyense J.W. Moore & Frankton CICH2queen thistle · Asteraceae - Cirsium chuskaense J.W. Moore & Frankton CICH3monarch thistle · Asteraceae
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Cirsium ciliolatum (L.F. Hend.) J.T. Howell CICIAshland thistle · Asteraceae -
Cirsium clavatum (M.E. Jones) Petr. CICLFish Lake thistle · Asteraceae -
Cirsium clokeyi S.F. Blake CICL2whitespine thistle · Asteraceae -
Cirsium crassicaule (Greene) Jeps. CICRslough thistle · Asteraceae -
Cirsium cymosum (Greene) J.T. Howell CICYperegrine thistle · Asteraceae -
Cirsium discolor (Muhl. ex Willd.) Spreng. CIDIfield thistle · Asteraceae -
Cirsium douglasii DC. CIDO2Douglas' thistle · Asteraceae - Cirsium douglasii DC. var. breweri (A. Gray) D.J. Keil & C.E. Turner CIDOB2Douglas' thistle · Asteraceae
- Cirsium douglasii DC. var. douglasii CIDODDouglas' thistle · Asteraceae
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Cirsium drummondii Torr. & A. Gray CIDR2dwarf thistle · Asteraceae -
Cirsium eatonii (A. Gray) B.L. Rob. CIEAEaton's thistle · Asteraceae -
Cirsium edule Nutt. CIEDedible thistle · Asteraceae -
Cirsium engelmannii Rydb. CIEN2Engelmann's thistle · Asteraceae -
Cirsium flodmanii (Rydb.) Arthur CIFLFlodman's thistle · Asteraceae -
Cirsium foliosum (Hook.) DC. CIFOelk thistle · Asteraceae -
Cirsium fontinale (Greene) Jeps. CIFO2fountain thistle · Asteraceae - Cirsium fontinale (Greene) Jeps. var. campylon (H. Sharsm.) Pilz ex Keil & C. Turner CIFOCMt. Hamilton thistle · Asteraceae
- Cirsium fontinale (Greene) Jeps. var. fontinale CIFOFfountain thistle · Asteraceae
- Cirsium fontinale (Greene) Jeps. var. obispoense J.T. Howell CIFOOChorro Creek Bog thistle · Asteraceae
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Cirsium gilense Wooton & Standl. CIGIGila thistle · Asteraceae -
Cirsium grahamii A. Gray CIGR2Graham's thistle · Asteraceae - Cirsium hillii (Canby) Fernald CIHIHill's thistle · Asteraceae
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Cirsium hookerianum Nutt. CIHOwhite thistle · Asteraceae -
Cirsium horridulum Michx. CIHO2yellow thistle · Asteraceae - Cirsium horridulum Michx. var. horridulum CIHOHyellow thistle · Asteraceae
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Cirsium hydrophilum (Greene) Jeps. CIHYSuisun thistle · Asteraceae - Cirsium hydrophilum (Greene) Jeps. var. hydrophilum CIHYHSuisun thistle · Asteraceae
- Cirsium hydrophilum (Greene) Jeps. var. vaseyi (A. Gray) J.T. Howell CIHYVVasey's thistle · Asteraceae
- Cirsium inornatum Wooton & Standl. CIIN5cloudcroft thistle · Asteraceae