Rapistrum rugosum
(L.) All. Giant MustardStems erect, 15–90 cm high, somewhat glaucous, hairs scattered to frequent, coarse. Lower leaves to 25 cm long, lateral lobes usually of 3 pairs, margins irregularly toothed. Sepals c. 3 mm long; petals 5–10 mm long. Fruit erect to appressed or slightly spreading, 5–10 mm long (including beak), breaking between the upper and lower segments, variably hairy; lower segment c. 3 mm long, less than 1 mm wide if sterile or to 1.5 mm if fertile; upper segment 3–6 mm long, 3–4 mm wide, wrinkled, ribbed; beak narrow, conical, 1–3 mm long; pedicel 2–5 mm long; upper seed c. 2 mm diam., light brown. Flowers mainly summer–autumn.
LoM, MuM, VVP, VRiv, RobP, MuF, GipP, OtP, WaP, CVU, GGr, NIS, EGL, HSF, Strz. Also naturalised SA, Qld, NSW, Tas., much of Europe. Native from Mediterranean to the Black Sea. Scattered in mostly western Victoria, usually on disturbed soils.
Fruit shape is extremely variable but always characteristic with its two differently shaped segments.
Entwisle, T.J. (1996). Brassicaceae. In: Walsh, N.G.; Entwisle, T.J., Flora of Victoria Vol. 3, Dicotyledons Winteraceae to Myrtaceae, pp. 399–459. Inkata Press, Melbourne.
Spinning
