General:
Aromatic annual herb from a taproot; stems erect, solitary, simple or with a few ascending branches, long- to stiff-hairy, yellow stalked-glandular above, 10-95 cm tall.

Leaves:
Basal leaves lacking; stem leaves often with fascicles in their axils, alternate, simple, entire, linear or lance-linear, 2-9 cm long, 1-7 mm wide, glandular, stiff-hairy.

Flowers:
Heads with ray and disk flowers, glomerate in 1-many small clusters or in a more open inflorescence; involucres spindle-shaped, 6-9 mm tall; involucral bracts broadly lanceolate, glandular; ray flowers 1-3, about 2 mm long, sometimes lacking from some heads, greenish-yellow to purplish, 1.5-2.5 mm long; disk flowers 1-10.

Fruits:
Achenes 5-nerved, compressed, glabrous, black, 4-6 mm long; pappus lacking.

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