Fields of introduced mustard were common in the bottomlands along the east side of the park. These photos were taken behind the Visitors Center.
I am just beginning to appreciate the diversity of introduced yellow-flowerd mustards in California and am having a great deal of trouble identifying this plant. I have it narrowed down to two similar species, the Black Mustard (Brassica nigra) and the Shortpod Mustard (Hirschfeldia incana), but any advice or insights would be greatly appreciated. @gbentall , @grnleaf are either of you familiar with this identification challenge?
in mowed area near campground
Hirschfeldia incana (formerly Brassica geniculata) is a species of flowering plant in the mustard family known by many common names, including shortpod mustard, buchanweed, hoary mustard and Mediterranean mustard. It is the only species in the monotypic genus Hirschfeldia, which is closely related to Brassica. The species is native to the Mediterranean Basin but it can be found in many parts of the world as an introduced species and often a very abundant noxious weed. This...