Lepidium coronopus

Annual or biennial herb, prostrate, without hairs; stems 5–30 cm long. Basal leaves petiolate, to 10 cm long, deeply pinnately divided with pinnately incised lobes; stem leaves becoming less divided. Inflorescence shorter than leaves at maturity. Sepals c. 1 mm long, persistent; petals c. 1 mm long, white; stamens usually 6; style c. 0.5 mm long. Fruit reniform, 2–3 mm long, 3.5–4 mm wide, base notched, apex acute, somewhat constricted at septum, not separating into 2 portions; valve surface with prominent ridges and peaks; pedicels 1.5–2 mm long, thick. Flowers spring–summer.