Brassica tournefortii Gouan

Annual herb with laxly caespitose rosette. Stems erect, hairy below, to 1 m tall. Rosette and lower stem lvs pinnate to lyrate pinnatifid, rarely simple in weak plants or seedlings, hairy or bristly especially on midrib beneath, (5)–10–15–(30) × (1)–3–5–(9) cm; margins toothed; terminal lobe small, usually ternate; lateral lobes in (4)–5–8 pairs, subacute. Upper stem lvs sessile, becoming simple, toothed to entire, lanceolate to linear, bristly especially on margins, 10–20 × 2–6 mm. Racemes to 40 cm long; open fls overtopping or about level with buds. Sepals oblong, 2–3 × 0.5–1 mm. Petals pale yellow, becoming whitish, veined with yellow or sometimes violet, 4–5–(7) × 1–1.5–(2) mm. All stamens erect. Silique terete, glabrous, linear, constricted between seeds, (30)–40–50–(70) × 1.5–2.5 mm; gynophore 0; valves with prominent median vein; beak linear, usually 1-seeded, 8–14–(20) mm long, (⅓)-1/2× length of valves. Seeds dark brown, 1–1.5 mm diam.

[From: Webb et al. (1988) Flora of New Zealand. Volume 4.]

Flowering: (Jul.)–Oct.–Mar.–(Jun.); Fruiting: (Jul.)–Oct.–Mar.–(Jun.)