General:
Perennial herb from a thick scaly rhizome and stout stem-base covered with remains of old leaves; stems erect, 5-30 cm tall, simple, tufted, sparsely spreading-hairy to long-soft-hairy.

Leaves:
Basal leaves numerous, short-stalked, erect to spreading, interruptedly pinnately divided, 4-12 cm long, the blades elliptic-oblong in outline, with 9 to 31 entire to 3- to 5-toothed main segments, the terminal segment similar to the lateral ones, from nearly smooth and greenish to silvery-silky or silvery-long-hairy; stem leaves alternate, several, much reduced.

Flowers:
Inflorescence of 1 or 2 (to 4) terminal, erect flowers; corollas yellow, wheel-shaped, the petals 5, nearly circular, spreading, 6-12 mm long; calyces often purplish, 5-lobed, the lobes narrowly egg-shaped, 5-10 mm long, alternating with lanceolate bractlets 3-7 mm long; ovaries superior; stamens numerous, about 60.

Fruits:
Achenes, several to many in hemispheric heads; achenes narrowly spindle-shaped, coarse-hairy, the styles persistent, not much elongated, about as long as the achenes, straight, 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

Synonyms and Alternate Names:
Acomastylis rossii (R. Br.) Greene