Checklist » Asteraceae » Cirsium arvense
Last updated 1/9/2008 by David Giblin.
Cirsium arvense (L.) Scop.[FNA19, HC, HC2]
Canadian thistle

Publication: Fl. Carniol. ed. 2. 2: 126. 1772.

Origin: Introduced from Eurasia

selected vouchers: WTU

Notes: Kz99, Cronquist & Chambers and Sundberg (2000) lump the vars., H&C, Stace (1997) & BC recognize them.

References: (none)

Synonyms & Misapplied Names:
Cirsium arvense (L.) Scop. var. arvense[HC]
Cirsium arvense (L.) Scop. var. horridum Wimm. & Grab.[HC]
Cirsium arvense (L.) Scop. var. mite Wimm. & Grab.