Sisymbrium officinale

Annual or biennial, to 90 cm high, with coarse hairs on lower leaves and stems. Stems usually stiffly branched, often purplish. Basal leaves in rosette, to 25 cm long but often much shorter, deeply pinnately dissected with 3–5 pairs of lateral lobes, margins toothed; stem leaves smaller towards inflorescence. Sepals 2–3 mm long; petals 2–4 mm long. Fruit erect, narrow-conical, straight, 1–2 cm long, c. 2 mm wide at base, often purplish; style indistinct, 0.5–1 mm long; pedicels appressed, 1–3 mm long. Flowers mostly spring.