Plants of South Eastern New South Wales

Brassica x juncea

Flowers. Photographer Bart Wursten, Zimbabwe

Plant. Photographer JC Schou, Denmark

Line drawings. USDA NRCS PLANTS database. Britton, N.L., and A. Brown. 1913. An illustrated flora of the northern United States, Canada and the British Possessions. Vol. 2: 193.

Common name

Indian Mustard, Brown Mustard, Chinese Mustard, Mustard Greens, Gai Choy

Family

Brassicaceae

Where found

Weed of cultivation and waste places. Mostly Sydney area. Occasional elsewhere.

Notes

Introduced annual herb to 1 m high. Stems almost erect, hairless. Leaves to 20 cm long; glaucous, basal leaves deeply lobed with 1 or 2 pairs of lobes, the terminal lobe larger than the lateral lobes. Stem leaves alternating up the stems, becoming smaller higher up the stems, eventually almost entire. Flowers with 4 petals each 7–9 mm long, pale yellow. Inflorescence elongating from a flat cluster. Flowers autumn. Seed cases erect or spreading, 2–6 cm long (including the beak), 2–4 mm wide, more or less 4-angled, constricted between the seeds, midrib prominent. Beak 4–12 mm long, seedless. Stalk 5–20 mm long. Seeds yellow, brown or grey.

PlantNET description:  https://plantnet.rbgsyd.nsw.gov.au/cgi-bin/NSWfl.pl?page=nswfl&lvl=sp&name=Brassica~x+juncea (accessed 13 April 2021)