UW Burke Herbarium species comparison

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Erysimum cheiri

Erysimum occidentale

Aegean wallflower

pale wallflower, western wallflower
Habit Grayish biennial from a simple crown, the simple, single stem 2-4.5 dm. tall.
Leaves

Basal leaves many, rosette-forming, linear-oblanceolate, 4-8 cm. long and 2-4 mm. broad, mostly entire;

cauline leaves many, linear to linear-lanceolate, 1-3 mm. broad, not much reduced upward, usually entire.
Flowers

Flowers rather showy, in crowded, bractless racemes; pedicles stout, ascending;

sepals 4, 8-10 mm. long, the outer 2 saccate at the base;

petals 4, bright yellow, the claw slightly exceeding the sepals, the obovate blade 6-10 mm. long;

stamens 6;

style 3-4 mm. long, stigma bi-lobed.
Fruits

Siliques ascending-erect, strongly flattened, 7-9 cm. long and about 2.5 mm. broad, the valves strongly nerved;

seeds in 1 series, narrowly wing-margined all the way around.

Erysimum cheiri

Erysimum occidentale
Flowering time April-June March-May
Habitat Disturbed areas, often escaped from cultivation. Sagebrush hills and valleys.
Distribution
Occurring west of the Cascades crest in Washington; Yukon Territory to California, and in scattered locations in eastern North America.
[WildflowerSearch map]
[BONAP county map]
Occurring east of the Cascades crest in Washington; northern Washington to eastern Oregon.
[WildflowerSearch map]
[BONAP county map]
Origin Introduced Native
Conservation status Not of concern Not of concern
Sibling taxa
E. arenicola, E. capitatum, E. cheiranthoides, E. inconspicuum, E. occidentale, E. repandum
E. arenicola, E. capitatum, E. cheiranthoides, E. cheiri, E. inconspicuum, E. repandum
Web links 
Unless otherwise noted, all data comes from the University of Washington's Burke Herbarium.



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