Common name: Black Mustard
Brassica nigra (L.) Kohl ex Koch APNI* 
Description: Annual herb to 1 m high, with slender taproot.
Lower leaves to 16 cm long, lyrate-pinnatisect with 1–3 pairs of lobes, bristly; upper leaves lanceolate, entire, glabrous, glaucescent.
Inflorescence subcorymbose. Petals 7–9 mm long, bright yellow. Siliqua appressed on pedicel, 10–20 mm long, c. 2 mm wide, 4-angled; beak 1.5–3 mm long; pedicel 2–5 mm long.
Distribution and occurrence: Widespread weed. Native of Eur.
NSW subdivisions: *NC
Other Australian states: *Qld *Vic. *Tas. *W.A. *S.A.
Text by L. Retter & G. J. Harden
Taxon concept: Flora of NSW 1 (1990)
APNI* Provides a link to the Australian Plant Name Index (hosted by the Australian National Botanic Gardens) for comprehensive bibliographic data
***The AVH map option provides a detailed interactive Australia wide distribution map drawn from collections held by all major Australian herbaria participating in the Australian Virtual Herbarium project.
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