Sisymbrium orientale L.

Annual herb. Stems erect, softly hairy, to 1 m tall. Lvs sparsely to densely hairy. Rosette and lower stem lvs lyrate-pinnatifid or pinnatifid to almost lyrate-pinnate, 5–10–(30) × (1)–2–8–(15) cm; terminal lobe ovate to triangular to hastate; lateral lobes in 1–5 pairs, narrow-lanceolate or triangular, entire, sinuate or coarsely toothed. Upper stem lvs usually smaller with narrower, but not linear-filiform lobes, or hastate, or ovate and not lobed. Racemes often flexuous, ebracteate, glabrous or sparsely hairy, 20–40–(60) cm long. Pedicels 3–5 mm long, elongating to c. 10 mm long at fruiting, sparsely hairy. Sepals usually hairy, 3–5 mm long, not horned. Petals yellow, 6–10 mm long. Anthers 1–1.5 mm long; filaments > sepals. Silique glabrous or hairy, spreading, linear-cylindric, (40)–60–100 × 1–1.5 mm; style 0.5–2 mm long. Seeds oblong, brown, c. 1 mm long.

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

Flowering: (Jul.)–Oct.–Feb.–(May); Fruiting: (Jul.)–Oct.–Feb.–(May)