Erysimum arenicola, the Cascade wallflower, is a plant species native to British Columbia, Washington and Oregon. It is found at high elevations from 900 to 2200 m in the Cascade and Olympic Mountains as well as on Vancouver Island.Flora of North America v 7 p 536.
Erysimum arenicola is a perennial herb up to 30 cm tall. Leaves are narrow, up to 8 cm long. Flowers are yellow, borne in a raceme. Fruits are narrow and elongated, up to 10 cm long, straight or twisted, strongly torulose (= much narrower in between seeds) giving a lumpy appearance along the length of the mature fruit (silique). Watson, Sereno. 1891. Proceedings of the American Academy of Arts and Sciences 26: 124photo of isotype of Erysimum arenicola at Missouri Botanical GardenHitchcock, C. H., A.J. Cronquist, F. M. Ownbey & J. W. Thompson. 1984. Salicaceae to Saxifragaceae. Part II: 1–597. In C. L. Hitchcock Vascular Plants of the Pacific Northwest. University of Washington Press, Seattle.
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