Streptanthus tortuosus: From the Greek streptas, "twisted," and anthos, "flower." Tortuosus: winding, very twisted.

[Wikipedia] Range, Habitat, Growth Pattern: Range and habitat It is native to the mountains of northern and central California, its distribution extending just into Oregon and Nevada. It grows in rocky and sandy areas in forests and woodland habitat. Growth pattern It is highly variable in appearance and some authors divide it into many subtaxa. In general, it is a biennial or perennial herb growing a few centimeters to over a meter tall. It is hairless and often waxy in texture. (link added by Mary Ann Machi)