General:
Perennial herb from a branched stem-base with fibrous roots; stems erect, clump-forming, fleshy, 60-100 cm tall.

Leaves:
Basal leaves lanceolate, pinnately divided into 8-21 leaflets with pointed tips, stalked, lower leaf surfaces hairy; stem leaves opposite, similar, not much reduced upwards, becoming short stalked upwards.

Flowers:
Inflorescence a corymbose, open cyme with numerous flowers; corollas pinkish-white, 4 mm long, lobed, the lobes 1 mm long; calyces with feathery segments.

Fruits:
Achenes, lance-oblong, 4.5-5 mm long, smooth.

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