[Wallflowers West of the Cascade Mountains of Oregon and Washington]

Prairie Rocket, Rough Wallflower, Douglas' Wallflower, Western Wallflower, Sanddune Wallflower

Erysimum capitatum var. capitatum

Synonyms: Erysimum asperum, Erysimum asperum, Erysimum asperum var. capitatum, Erysimum capitatum ssp. capitatum

Prairie Rocket, Rough Wallflower: Erysimum capitatum var. capitatum (Synonym: Erysimum asperum)

What may be rough wallflower as seen on scree slopes in Olympic National Park.........July 2009. The petals have an orangish cast to them.

Prairie Rocket, Rough Wallflower, Doutlas' Wallflower, Western Wallflower, Sanddune Wallflower: Erysimum capitatum var. capitatum (Synonyms: Erysimum asperum, Erysimum asperum, Erysimum asperum var. capitatum, Erysimum capitatum ssp. capitatum)

Prairie rocket as seen on Saddle Mountain in the Coast Range of northwestern Oregon..........May 2, 2016. The petals have an orangish cast to them.


Prairie Rocket, Rough Wallflower, Doutlas' Wallflower, Western Wallflower, Sanddune Wallflower: Erysimum capitatum var. capitatum (Synonyms: Erysimum asperum, Erysimum asperum, Erysimum asperum var. capitatum, Erysimum capitatum ssp. capitatum) - Close-up of the flower of Prairie Rocket, Rough Wallflower, Doutlas' Wallflower, Western Wallflower, Sanddune Wallflower: Erysimum capitatum var. capitatum (Synonyms: Erysimum asperum, Erysimum asperum, Erysimum asperum var. capitatum, Erysimum capitatum ssp. capitatum) - Close-up sideview of the flower of Prairie Rocket, Rough Wallflower, Doutlas' Wallflower, Western Wallflower, Sanddune Wallflower: Erysimum capitatum var. capitatum (Synonyms: Erysimum asperum, Erysimum asperum, Erysimum asperum var. capitatum, Erysimum capitatum ssp. capitatum)

Rough wallflower as seen at Rough and Ready Botanical Wayside in southwestern Oregon............April 29, 2012. Note the orangish flowers which indicates Erysimum capitatum rather than Erysimum arenicola.

Synonyms: Erysimum asperum, Erysimum asperum, Erysimum asperum var. capitatum, Erysimum capitatum ssp. capitatum - Synonyms: Erysimum asperum, Erysimum asperum, Erysimum asperum var. capitatum, Erysimum capitatum ssp. capitatum - Synonyms: Erysimum asperum, Erysimum asperum, Erysimum asperum var. capitatum, Erysimum capitatum ssp. capitatum

Close-ups of what may be prairie rocket as seen on Saddle Mt. in the northern Oregon Coast Range. The photo at left was taken June 14, 2009 while the two at right were taken on May 21, 2009. These could possibly be E. arenicola since there are no mature fruits and the petals are a medium yellow.

Prairie Rocket, Rough Wallflower, Doutlas' Wallflower, Western Wallflower, Sanddune Wallflower: Erysimum capitatum var. capitatum (Synonym: Erysimum asperum)

The cluster of lower stem leaves and terminal flower buds of rough wallflower as seen at Rough and Ready Wayside in southwestern Oregon...........April 5, 2009. Note the grayish hairy surfaces of the leaves and stem, a way to distinguish this from the similar Erysimum arenicola.

Inflorescence of Prairie Rocket, Rough Wallflower, Doutlas' Wallflower, Western Wallflower, Sanddune Wallflower: Erysimum capitatum var. capitatum (Synonyms: Erysimum asperum, Erysimum asperum, Erysimum asperum var. capitatum, Erysimum capitatum ssp. capitatum)

Rough wallflower as seen at the King Mountain Rock Garden ACEC in northeastern Josephine County, OR........June 11, 2017.

Paul Slichter