Rotundifolia:  Answers to key questions in Budd's Flora and Flora of Alberta leading to this species.   basal leaves ovate or cordate; NOT linear, NOT narrowly lanceolate basal leaves soon withering stem leaves narrow, linear to filiform; NOT broad, NOT [ovate  to ovate-lanceolate] stem leaves less than 1 cm wide stem usually bearing many flowers; NOT [simple, bearing a solitary terminal flower] flowers NOT crowded into a head inflorescence NOT secund calyx glabrous flowers more than 12 mm long corolla 1-2 cm long; NOT 2-3 cm long

 

Campanulaceae: Answers to key questions in Budd's Flora leading to this family.  herbs; NOT shrubs, NOT trees plants green or with some chlorophyll NOT climbing plants plants often with milky juice leaves basal or alternate; NOT opposite flowers NOT in heads, NOT in form resembling a head; NOT [in long or short spikes] flowers with two floral rings, but with the petals wholly or partly united forming a tube or bell corolla regular corolla bell-shaped; NOT split down one side anthers free; NOT united into a tube ovary inferior