Erysimum arenicola var. torulosum

General:
Perennial herb from a taproot; simple or several-stemmed, 10-25 (50) cm tall, sparsely grey-hairy; stem-base often covered with old persistent leaf bases.

Leaves:
Basal leaves tufted, numerous, spoon-shaped to oblanceolate, stalked, entire to dentate, obtuse to sharp-pointed, 2.5-6 (7) cm long, 1.5-8 mm wide, hairy with 2- to 3-branched hairs; stem leaves variable, sometimes reduced but often larger than the basal, usually wavy-toothed.

Flowers:
Inflorescence slender, 3-10 cm long, somewhat ascending; petals lemon yellow, the claw 10-15 mm long, the blade narrowly to broadly egg-shaped, 5-9 mm long; sepals erect, hairy.

Fruits:
Siliques, ascending to erect, 3-12 cm long, 2-2.5 mm wide, compressed parallel to the plane of the partitions, alternately contracted and expanded, glabrous to hairy with 2- to 4-branched hairs; beaks 1-4 mm long; seeds 2-3 mm long, wingless or with a slight apical wing margin.

Source:  The Illustrated Flora of British Columbia

Synonyms and Alternate Names:
Erysimum arenicola var. arenicola
Erysimum arenicola var. torulosum (Piper) C.L. Hitchc.
Erysimum torulosum Piper