Perennial herb from a rhizome; stems erect, simple or branched above, smooth below, 20-70 cm tall.
Alternate, lanceolate to narrowly elliptic, 5-10 cm long, sharply toothed, long-pointed, not succulent.
Inflorescence a terminal cyme, with glandular-stalked hairs, 2-8 cm long, the flowers borne on 1 side of the axis, greenish; petals usually absent; sepals 5, broadly-lanceolate.
Follicles, strongly beaked, flattened, circular, 5-6 mm wide, spreading at maturity, the base formed by the expanded hypanthium, eventually circumcissile just above the placentae; seeds spindle-shaped, covered with minute papillae, usually reddish-brown.
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
Source: The USDA