Cirsium P. Miller. Thistle.
A genus of about 250 species, herbs, north temperate.
Key adapted in part from Cronquist (1980); portions of key based on Keil (2006f).
Ref: Cronquist (1980); Keil (2006f) In Flora of North America Editorial Committee (2006a); Nesom (2021i); Nesom (2022a). Show full citations.
Hover over a shape, letter, icon, or arrow on the map for definition or see the legend. Data for arrows not developed for genera and families which may have species only occurring outside the flora area.
© Keith Bradley | Cirsium altissimum | Original Image ⭷
© John Gwaltney | Cirsium arvense | Original Image ⭷
© Floyd A. Griffith | Cirsium altissimum | Original Image ⭷
© Scott Ward | Cirsium muticum | Original Image ⭷
© Sonnia Hill | Cirsium engelmannii | Original Image ⭷
© Gary P. Fleming | Cirsium pumilum | Original Image ⭷
© Bruce A. Sorrie | Cirsium repandum | Original Image ⭷
© Gary P. Fleming | Cirsium virginianum | Original Image ⭷
© Scott Ward | Cirsium muticum | Original Image ⭷
© J.W. Hardin | Cirsium vulgare | Original Image ⭷
© Scott Ward | Cirsium carolinianum | Original Image ⭷Feedback
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