Perennial herb from a strong taproot; stems erect, usually solitary, unbranched (below the inflorescence), 60-100 cm tall, smooth.
Basal and lower stem leaves oblong to oblong-lanceolate, blunt to nearly heart-shaped at the base, smooth, the blades up to 15 cm long, the stalks long; stem leaves alternate, similar, reduced upwards.
Inflorescence of many flowers in an open, much-branched, leafy-bracted panicle; flower stalks jointed below midlength; outer perianth segments 1-1.5 mm long, inner perianths segments 2-3 mm long, with oblong, grain-like swellings half the length of the segment.
Achenes, smooth, about 1.5-2 mm long.
If more than one illustration is available for a species (e.g., separate illustrations were provided for two subspecies) then links to the separate images will be provided below. Note that individual subspecies or varietal illustrations are not always available.
Illustration Source: The Illustrated Flora of British Columbia