Lepidium bonariense L.

Annual or biennial. Stem erect, branched above, hairy, (10)–20–45–(90) cm tall. Lvs hairy. Basal and lower stem lvs falling at flowering, 2–3-pinnatisect with linear segments, (2)–3–10 × 1–4 cm; petiole expanded at base, < lamina. Upper stem lvs becoming sessile, pinnatifid, 1–3 × 0.5–1.5 cm. Racemes 5–15–(30) cm long; rachis hairy; pedicels hairy, spreading, 2.5–4 mm long at fruiting. Sepals with long tangled hairs or glabrous, 0.5–1 × 0.3–0.5 mm. Petals white, linear, much < sepals or 0. Stamens 2. Silicle circular or broadly elliptic, 2.5–3.5 × 2.5–3.5 mm; style free from the narrow wing, c. 0.1 mm long, not protruding beyond the apical notch; valves glabrous with fine veins when ripe. Seeds brown, ovoid, winged, c. 1.5 mm long.

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

Flowering: (Aug.)–Nov.–May–(Jun.); Fruiting: (Aug.)–Nov.–May–(Jun.)