E-Flora BC: Electronic Atlas of the Flora of British Columbia

Erysimum arenicola S. Watson
sand-dwelling wallflower (cascade wallflower)
Brassicaceae (Mustard family)

Introduction to Vascular Plants

© Hans Roemer  Email the photographer   (Photo ID #22983)

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Distribution of Erysimum arenicola
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Erysimum arenicola var. torulosum

Species Information

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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.
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.
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.
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

Habitat / Range

Moist to mesic rocky slopes or talus slopes in the alpine zone; infrequent in SW BC, known only from Vancouver Island; S to OR.

Source: The Illustrated Flora of British Columbia


The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is not evaluated, unknown or variable.

Synonyms and Alternate Names

Erysimum arenicola var. arenicola
Erysimum arenicola var. torulosum (Piper) C.L. Hitchc.
Erysimum torulosum Piper

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References