Brassica nigra (L.) W.Koch

Black Mustard

Deutschl. Fl., edn 3, 4: 713 (1833) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Naturalised

Annual. Taproot slender. Stems erect, to 1 m high, herbaceous, branched, thin, usually with a bluish spot in axil, bristly at base to glabrous above. Leaves petiolate; basal leaves with 1–3 pairs of irregularly-toothed lateral lobes, bristly on both sides; upper leaves lanceolate, entire, glabrous, often glaucous. Inflorescence crowded. Sepals inclined, 4–5 mm long; petals 7–9 mm long, bright yellow; stamens erect; ovary sessile. Fruit erect-appressed, 1–2 cm long (including beak), 1–2 mm wide, quadrangular; valves slightly constricted between seeds, midrib prominent; beak 1–3 mm long, seedless; pedicel 3–8 mm long; seeds c. 2 mm wide, dark red-brown.

*CVU, *GipP, *Gold, *MuM, *Strz, *VVP. WA, SA, Qld, NSW, Tas. Native to Europe. Flowers Nov.-Jan.

In the past, the seeds were used in mustard (Brassica ×juncea and Sinapis alba are now used) and as a source of oil for soap and medicine.

Source: Entwisle, T.J. (1996). Brassicaceae. In: Walsh, N.G.; Entwisle, T.J. (eds), Flora of Victoria Vol. 3, Dicotyledons Winteraceae to Myrtaceae. Inkata Press, Melbourne.
Updated by: Val Stajsic, 2018-10-01
Hero image
Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
superorder Rosanae
order Brassicales
family Brassicaceae
genus Brassica
Higher taxa


Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <>. Find Brassica nigra in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Brassica nigra in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Murray Mallee present naturalised
Victorian Volcanic Plain present naturalised
Gippsland Plain present naturalised
Goldfields present naturalised
Central Victorian Uplands present naturalised
Strzelecki Ranges present naturalised

State distribution

Distribution map
Western Australia
South Australia
New South Wales
Australian Capital Territory