Basal Leaf Top
East of Glenavon on Highway # 48
Note that the key to the species in Budd's Flora requires that the plant have a taproot. The key in Flora of Alberta requires that there be NO branching rootstocks or basal tufts developed from a caudex. In fact, the stem arises from a shortened, densely fibrous-rooted caudex as described in Flora of the Great Plains.
Note also that the key to the species in Flora of Alberta requires that the leaves be mostly entire or coarsely toothed; NOT mostly pinnatifid. Yet the flora admits in the species description that the leaves may be shallowly pinnatifid. The basal leaves in my specimen appear to be border-line pinnatifid.
Congestus: Answers to key questions in Budd's Flora and Flora of Alberta leading to this species.
Senecio: Answers to key questions in Budd's Flora and Flora of Alberta leading to this genus.