E-Flora BC: Electronic Atlas of the Flora of British Columbia

General:
Perennial herb from a stout taproot; stems erect, solitary, unbranched (below the inflorescence), 50-100 cm tall, smooth.

Leaves:
Basal leaves oblong-lanceolate, wedge-shaped to rounded at the base, strongly crisp-margined, the blades 10-30 cm long, the stalks long, pimply and finely hairy; stem leaves alternate, reduced upward, becoming short-stalked.

Flowers:
Inflorescence of numerous flowers in a large, dense, usually greenish, elongate panicle; flower stalks jointed below midlength; outer perianth segments about 1.5 mm long, inner perianth segments mostly 4-6 mm long, each usually with an elliptic-oblong, net-veined, grain-like swelling.

Fruits:
Achenes brown, smooth, shiny, about 2.5 mm long.