General:
Perennial herb from a vertical or ascending rhizome; stems erect, 1 or more, 10-35 cm tall.

Leaves:
Basal, 1 or 2 or absent, ascending, 3-parted, the leaflets 2.5-6 cm long, coarsely toothed on the upper 1/2 to 2/3, tips pointed, lateral leaflets sometimes lobed, soft-hairy or smooth; stalks 10-20 cm long.

Flowers:
Inflorescence a solitary, terminal flower; flower stalks soft-hairy above; involucral bracts 3, leaf-like, stalked, similar to basal leaves; petals absent; sepals 5 to 7, petal-like, white, rarely pinkish, elliptic egg-shaped to egg-shaped, 8-20 mm long, 6-8 mm wide, smooth; stamens 35-55 (90).

Fruits:
Achenes, several in a nearly spheric head on stalks 2-5 cm long, the achenes ellipsoid to egg-shaped, 3-4 mm long, 1.5-2 mm wide, not winged, soft-hairy; beaks straight or slightly curved, 0.5-1 mm long, smooth or minutely-hairy near attachment.

Source:  The Illustrated Flora of British Columbia

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