Reference:Rossbach1958a
Verbatim text: Rossbach, G. B. 1958. The genus Erysimum (Cruciferae) in North America north of Mexico—A key to the species and varieties. Madroño 14: 261–267.
Author: Rossbach, G.B.
Year: 1958
Title: The genus Erysimum (Cruciferae) in North America north of Mexico—A key to the species and varieties
Journal: Madroño
Volume: 14
Pages: 261–267