Canada Thistle, Creeping Thistle
Cirsium arvense
Synonyms: Cirsium arvense var. arvense, Cirsium arvense var. horridum, Cirsium arvense var. mite
The photo above shows a close-up side-view
of the inflorescence of Canada thistle as seen along Road #23 at the Mt. Adams
viewpoint at the southwestern corner of Mt. Adams........August 6, 2005.
The photo above shows a close-up view from
above of the inflorescence of Canada thistle as seen along Road #23 at the Mt.
Adams viewpoint at the southwestern corner of Mt. Adams........August
6, 2005.
The photo above shows a close-up of a stem
leaf of Canada thistle as seen along Road #23 at the Mt. Adams viewpoint at
the southwestern corner of Mt. Adams........August 6, 2005. The
stem leaves of Canada thistle are not as deepllly lobed as those of bull
thistle (Cirsium vulgare).
Paul Slichter