Page author: David Giblin
Erysimum arenicola
sand-dwelling wallflower
WTU specimens
Other herbaria

Distribution: In the Olympics, Cascades, and Blue mountains of Washington; British Columbia south to Oregon.

Habitat: Open ridges and rock crevices, moderate to high elevations in the mountains.

Flowers: June-September

Origin: Native

Conservation Status: Not of concern

Description:
General:

Herbaceous perennial, grayish with fine, appressed, aligned hairs, usually with several stems 1-2.5 dm. tall from a branched crown.

Leaves:

Basal leaves numerous in a rosette, linear-oblanceolate to oblanceolate, 2.5-6 cm. long and 1.5-8 mm. wide, entire to deeply wavy-dentate; cauline leaves alternate, several, variable, reduced or larger than the basal, usually deeply wavy-dentate.

Flowers:

Flowers rather showy, in crowded, bractless racemes; pedicles slender, 3-10 mm. long, somewhat ascending; sepals 4, erect, the outer pair somewhat saccate at the base; petals 4, lemon yellow, the claw 10-15 mm. long, the blade obovate, 5-9 mm. long; stamens 6; style beaklike, 2-3.5 mm. long, stigma bi-lobed.

Fruits:

Siliques ascending to erect, flattened, lumpy, 3-12 cm. long and 2-2.5 mm. wide, the valves strongly nerved; seeds in 1 series, wingless.

Accepted Name:
Erysimum arenicola S. Watson
Publication: Proc. Amer. Acad. Arts. 26: 124. 1891. 1891.

Synonyms & Misapplications:
Cheiranthus arenicola (S. Watson) Greene
Erysimum arenicola S. Watson var. arenicola [HC]
Erysimum arenicola S. Watson var. torulosum (Piper) C.L. Hitchc. [HC]
Erysimum torulosum Piper
Additional Resources:

PNW Herbaria: Specimen records of Erysimum arenicola in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Erysimum arenicola checklist entry.

E-Flora BC: Erysimum arenicola atlas page.

CalPhotos: Erysimum arenicola photos.

USDA Plants: Erysimum arenicola information.

43 photographs:
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