Brassica L.

Each dry fruit valve with a strong central vein and faint lateral ones; beak slender. Sepals almost erect Brassica
Plants glaucous, occasionally with scattered bristly hairs
Uppermost leaves stem-clasping, auriculate. Sepals 5–6 mm long. Fruit 4–7 cm long, with a slender ± conical seedless beak. Seeds large. Widespread. Weed of cultivation and waste places. Introd. from Europe. Bird Rape or Wild Turnip Brassica rapacampestris
Uppermost leaves never stem-clasping. Sepals 3–4 mm long. Plants glabrous throughout or setose-hispid on lowest part of stem