Erysimum insulare is a species of wallflower known by the common name island wallflower. It is endemic to coast of southern California, including the Channel Islands. Erysimum insulare grows on coastal bluffs and sand dunes. 
Erysimum insulare is a perennial herb or subshrub producing a branching, erect stem 5 to 60 centimeters tall. It is lined with many hairy leaves which are linear to widely lance-shaped. The longest leaves near the base of the stem may be up to 15 centimeters long.
There are two subspecies of this plant:
- Erysimum insulare ssp. suffrutescens — most individuals belonging in this one.
- Erysimum insulare ssp. insulare — rare and limited to three of the northern Channel Islands in Channel Islands National Park. 
- Calflora database: Erysimum insulare . accessed 2.14.2013
- California Native Plant Society—CNPS Inventory Plant Detail: Erysimum insulare ssp. insulare . accessed 2.14.2013
- Jepson Manual Treatment - Erysimum insulare
- USDA Plants Profile; Erysimum insulare
- Erysimum insulare - Photo gallery
|This Brassicales article is a stub. You can help Wikipedia by expanding it.|