Streptanlhus vernalis is a newly described species inhabiting serpentine rock outcrops in the Three Peaks area in Lake County, California. Morphological and allozyme data indicate that this taxon is related to the S. morrisonit complex.
Dolan, Rebecca W. and O'Donnell, Richard, "A new species of Streptanthus (Brassicaceae) from Three Peaks in Lake County, California" (2005). Scholarship and Professional Work - LAS. Paper 46.