Cakile edentula (Bigelow) Hook.

Stems 30–60 cm tall, much-branched from base, stout, glabrous, sprawling to suberect, forking; main stem often flexuous. Rosette lvs fleshy, obovate to oblanceolate, shallowly pinnatifid, petiolate, 4–6 × 1.5–3 cm; margins serrate; stem lvs narrower and shorter, oblanceolate, obtuse, bluntly serrate. Infl. rachis flexuous, thickening and elongating at fruiting. Pedicels suberect to spreading, 1–3 mm long. Fls 6–8 mm diam., clustered. Petals 4–6 × 1–1.5 mm. Silique erect, (12)–15–22 × 4–7 mm; upper segment ovate, acuminate, tapering to a narrow winged beak, emarginate, 4-angled or 8-ribbed, somewhat flattened, frequently persistent if lower segment seedless, 8–13 mm long; lower segment terete, barrel-shaped, often obconic, (4)–6–9 mm long, without lateral horns.

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

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