, Family Mustard (Brassicaceae) Height 6' Color Yellow Flowers Tiny, 4-petaled Blooms February - July Leaves Basal leaves pinnately lobed, coarsely toothed Habitat Grassy open areas. Fields. Orchards. Roadsides. Disturbed places.     Non native. Invasive. Introduced from Europe. Many varieties. Black mustard, Brassica nigra, is cultivated for seeds to make table mustard. caption: file: x - square 0" x 0" at 300 dpi - release: contact us regarding image add image to lightbox References Alden, Peter, and Fred Heath. National Audubon Society Field Guide to California. New York: Knopf, 1998. Beidleman, Linda H., and Eugene N. Kozloff. Plants of the San Francisco Bay Region: Mendocino to Monterey. Berekeley, CA: University of California, 2003. Munz, Philip A. Introduction to California Spring Wildflowers of the Foothills, Valleys, and Coast. Eds. Dianne Lake and Phyllis M. Faber. Berekeley, CA: University of California, 2004.