[Sinapis nigra L.]
Etymology: Brassica: Latin name for "cabbage"
Plants: erect, annual, 6"-60" tall forb; stems with rough hairs toward the base, smooth and hairless above
Leaves: stalked, not clasping, oval; lower leaves often lobed, upper leaves toothed
Flowers: yellow, 4-parted, 1/4" wide; inflorescence a rounded cluster (raceme) of stalked flowers; blooms June-Sept.
Fruits: 1/2"-3/4" long, thin, erect, 4-angled pod lying near the stem
Habitat: disturbed sites, fields
Conservation Status: Introduced - naturalized
Flora of North America: Flora of North America USDA Plants Database: Federal Distribution and detailed information including photos Dan Tenaglia's The Missouri Flora: Fabulous photographs; detailed descriptions; color and leave arrangement key. 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" Illinois Wildflowers: Wonderful photographs; detailed descriptions; color and leaf arrangement key