Family = Brassicaceae, Genus = Brassica, Species = nigra, including synonyms,
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|Brassica nigra (black mustard)
(= Brassica nigra in Flora of the Pacific Northwest)
Tall annual herb; stems 0.4-1.5 meters tall; usually branching; hairy near base. Distinguished from other Brassica spp. mostly by fruit characteristics; see technical keys.
Distribution: Occurring in scattered locations throughout Washington; widely distributed throughout much of North America.
Habitat: Distrubed areas such as roadsides, fields, and waste lots.
Origin: Introduced from Eurasia
WA Native Plant Society