Brassica ×juncea (L.) Czern.

Indian Mustard

Consp. Pl. Chark. 8 (1859) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Naturalised

Annual. Taproot relatively slight. Stems almost erect, to 1 m high, herbaceous, branched, glabrous. Leaves glaucous; basal leaves to 20 cm long, petiolate, deeply lobed, with a large terminal lobe and 1 or 2 smaller lateral ones, sparsely bristly; upper leaves shortly petiolate, smaller, oblong, oblanceolate or lanceolate; margins toothed or entire, glabrous. Inflorescence with open flowers equalling buds, elongating with age. Sepals inclined, 4–5 mm long; petals 7–9 mm long, pale yellow; stamens erect; ovary sessile. Fruit erect-ascending, 2–6 cm long (including beak), 2–4 mm wide; valves constricted between seeds, midrib prominent, lateral veins forming network; beak narrower than stigma, 4–12 mm long, seedless; pedicel 5–14 mm long; seeds 1–3 mm diam., yellow, brown or grey. Flowers autumn.

*GipP, *Gold, *MuM, *OtP, *VVP, *Wim. Naturalised all States except ACT. Probably derived from a hybrid between Brassica rapa and B. nigra, possibly originating independently in both eastern Africa and Asia. Weed of agricultural land in Australia.

Commercial mustard is mostly made by mixing the crushed seed of Brassica ×juncea (B. nigra was used in the past) with that of Sinapis alba.

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
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 ×juncea in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Brassica ×juncea in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Murray Mallee present naturalised
Wimmera present naturalised
Victorian Volcanic Plain present naturalised
Gippsland Plain present introduced
Otway Plain present naturalised
Goldfields present naturalised