Annual or short-lived perennial herb with taproot, glabrous, 30-150 cm high. Stems erect, usually solitary, unbranched or with few erecto-patent branches. Basal and lower cauline leaves originally numerous (in older specimens lacking), 40-150 by 10-30 mm, petiolate, lyrato-pinnate with 1-4 pairs of oblong 5-12 by 2-10 mm lateral lobes; terminal lobe elliptic to ovate, 20-35 by 9-30 mm; cauline leaves numerous, 3-10 by 0.7-2 cm, lyrato-pinnatifid with long petioles, auriculate, with usually one pair of side-lobes; terminal lobe 1.5-5 by 0.7-2 cm; margins serrate to distantly crenate. Racemes ebracteate, terminal, sometimes numerous from upper branches, in flower much condensed with 30-70 flowers, in fruit up to 80 cm long; pedicels divaricate at ± 90°, straight, stout, 5-8 mm long. Sepals oblong, 2.5-4 mm long. Petals white, broadly spathulate, 3.5-7 mm long. Stamens 6; anthers 0.6-0.8 mm long. Ovary narrowly cylindrical with c. 0.5 mm long style. Siliquae linear, straight or fairly curved, 30-50 by 1.7-2.2 mm; valves rather firm; style 0.8-1.2 by c. 0.4 mm; stigma flat, slightly broader than style. Seeds dark brown, broadly oblong to subspheroid in outline, 1.2-1.4 by 0.9-1.1 mm, regularly reticulate-foveolate.
Home