Erysimum capitatum var. capitatumSynonyms: Erysimum arkansanum, Erysimum asperum, Erysimum asperum var. arkansanum, Erysimum asperum var. capitatum, Erysimum capitatum ssp. capitatum, Erysimum capitatum var. stellatum, Erysimum capitatum var. washoense, Erysimum elatum, Erysimum moniliforme, Erysimum wheeleri
Rough wallflower as seen from the southern slopes of Mt. Adams..............May 2005.
Rough wallflower like other cousins of the same name, is an attractive wildflower with a sweet fragrance. It is a biennial or short-live perennial usually found with a single erect stem which is most often unbranched and ranges from 20-100 cm tall. The basal leaves are numerous, in a rosette with entire to toothed margins. The basal leaves range from 3-12 cm long and 2-10 mm wide. The stem leaves may be entire to toothed margined too, and are reduced in size.
The petals are yellow or deep orange and range from 15-25 mm long The seed pods are slightly flattened siliques from 3-10 cm long and about 1-1.5 mm wide. The siliques ascend or are erect, and may be straight or slightly arched.
Rough wallflower would make an excellent addition to the naturalized garden!
Rough wallflower is found on open to lightly wooded slopes.
Rough wallflower is found from southern British Columbia eastward to Minnesota, and southwards to Oklahoma and California. It is generally found east of the Cascade Mts., but is found westward through the Columbia Gorge into the Willamette Valley.
In the Columbia River Gorge, it may be found throughout the breadth of the gorge and from 100'-4900'.