[Wikipedia] Range, Description: Streptanthus cordatus is a species of flowering plant in the mustard family known by the common name heartleaf twistflower.[1][2] It is native to the western United States, where it can be found in many types of sagebrush, woodland, and forest habitat. The fruit is a thin, narrow silique which may reach 14 centimeters in length or longer. (link added by Mary Ann Machi)