Sisymbrium officinale (L.) Scop.

Annual herb. Stem erect, hairy, to 1 m tall. Lvs and petioles with fine stiff hairs. Rosette lvs deeply lyrate-pinnatifid to lyrate-pinnate, (3)–7–25–(30) × (1.5)–2–9–(12) cm; terminal leaflet not lobed or 2–3-lobed, broadly toothed, ovate to reniform; lateral leaflets in 2–6 pairs, ± deflexed, triangular. Upper stem lvs smaller, deeply lyrate-pinnatifid to lyrate-pinnate; terminal leaflet narrow-oblong; lateral leaflets in 1–2 pairs, spreading or ± deflexed. Uppermost stem lvs becoming simple and hastate to narrow-triangular. Racemes ebracteate, suberect to spreading, hairy, (10)–20–30–(40) cm long. Pedicels c. 3 mm long, hairy. Sepals hairy, c. 2 mm long, not horned. Petals yellow, 3–4 mm long. Anthers c. 0.5 mm long; filaments > sepals. Silique hairy or glabrous, appressed to stem, tapering evenly from base, 10–15–(20) × 1–2 mm; style c. 0.5 mm long. Seeds oblong, brown, c. 1 mm long.

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

Flowering: (Sep.)–Oct.–Jan.–(Jun.); Fruiting: (Sep.)–Oct.–Jan.–(Jun.)