Erysimum
wallflower
7 species
1 subspecies and varieties
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Erysimum arenicolasand-dwelling wallflower
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.
Origin: Native
Flowers: June-September
Erysimum capitatum
Distribution: On both sides of the Cascades in Washington; Alaska south to California, east to Ohio and Texas.
Habitat: Often in sandy soil, plains to moderate elevations in the mountains.
Origin: Native
Flowers: May-July
var. capitatum – prairie rocket, rough wallflower
Erysimum cheiranthoidestreacle mustard, wormseed wallflower
Distribution: Occurring chiefly east of the Cascades crest in Washington; widely distributed throughout much of North America.
Habitat: Disturbed areas including fields, roadsides and wastelots, often where moist.
Origin: Introduced from Eurasia
Flowers: June-August
Erysimum cheiriAegean wallflower
Distribution: West of the Cascades in Washington; scattered locations in western and eastern North America.
Habitat: Disturbed areas, often escaped from cultivation.
Origin: Introduced
Flowers: April-June
Erysimum inconspicuumprairie rocket, small-flowered rocket, small-flowered rocket rocket, small wallflower
Distribution: Known from the northeast region in Washington; Alaska south to Oregon and Nevada, east across much of the U.S. and Canada to the Atlantic Coast.
Habitat: Rock outcroppings and roadsides where calcareous, also tolerant of alkaline soils.
Origin: Native
Flowers: June-July
Erysimum occidentalepale wallflower, western wallflower
Distribution: East of the Cascades in Washington; Washington to Nevada, east to Idaho.
Habitat: Sagebrush hills and valleys.
Origin: Native
Flowers: March-May
Erysimum repandumspreading wallflower
Distribution: East of the Cascades in Washington; distributed throughout much of North America.
Habitat: Wasteland in dry areas, plains and lower mountains.
Origin: Introduced from Eurasia
Flowers: April-June