Arctium tomentosum Cotton Burdock
Upper Branch, Top Regina 21-July-2017
Upper Branch, Top
Regina 21-July-2017
Tomentosum: Answers to key questions in Budd's Flora and Flora of Alberta leading to this species.
involucre densely arachnoid-tomentose; NOT [involucre glabrous, sometimes slightly woolly]
corolla glandular