Etymology: Brassica: Latin name for "cabbage"
Plants: erect, annual, to 24" tall forb; bulbous, reddish, edible root
Leaves: lower leaves stalked, more or less pinnately lobed; upper leaves stalkless and clasping the stem
Flowers: yellow, 4-parted, 1/4" wide; inflorescence a loose clusters (raceme) of stalked flowers
Fruits: long, thin pod, round in cross section, mostly pointing upward and widely spaced
USDA Plants Database: Federal Distribution and detailed information including photos USDA Agricultural Research Service (ARS): Images of seeds, fruits, embryos, etc. Southwest School of Botanical Medicine: Britton & Brown Illustrated Flora - 2nd Edition (1913) "An Illustrated Flora of the Northern United States and Canada" David G. Smith's "Delaware Wilflowers": Beautiful photographs; descriptions