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General:
Perennial herb from a large taproot; stems erect, solitary, simple (below the inflorescence), 60-120 cm tall, pimply and finely hairy.
Leaves:
Basal leaves widely oblong or widely egg-shaped, heart-shaped at the base, the margins often crisped, the blades 10-30 cm long, the stalks long; stem leaves alternate, several, similar to basal leaves but reduced upward.
Flowers:
Inflorescence of numerous flowers in a large, many-flowered panicle, 30-50 cm long; perianths greenish-brown, the segments with short, stout teeth on each margin; outer segments about 3 mm long, the ascending inner segments about 5 mm long, net-veined, the margins with 2-4 teeth and usually 1 of the 3 segments with a prominent, grain-like swelling.
Fruits:
Achenes, brown, smooth, shiny, about 2 mm long.
Source: The Illustrated Flora of British Columbia
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