Glab. perennial herb up to 1 m. or more tall, with long taproot; stock c. 1 cm. diam.; stems up to 1 cm. diam., erect to spreading, branching at a wide angle. Lvs up to c. 15 cm. long, thin, oblong to lanceolate in outline, subacute to acuminate, cuneately narrowed into amplexicaul base; coarsely and irregularly serrate (rarely subentire) to lyrately pinnatifid. Racemes simple or sparingly branched, up to c. 5 dm. long; pedicels sub- patent, c. 5 mm. long. Sepals ovate-oblong, ± 3 mm. long; petals white, linear-spathulate, ± 3·5 mm. long. Siliques 3 × 1-1·5 cm., spreading; styles stout, c. 2 mm. long. Seeds c. 1 × 0.75 mm., reticulate-papillose, reddish brown.

2n = 48

2n = 48

2n = 48

Glabrous perennial taprooted herb. Stems erect, to 1 m tall. Lf margins shallowly dentate. Lower lvs petiolate; petiole winged and expanded into deflexed amplexicaul lobes at base; lamina pinnatifid, (6)-10-16 × (2)-3-7 cm. Upper lvs smaller, linear to lanceolate, simple, cuneately narrowed to expanded amplexicaul base. Pedicels erecto-patent at flowering, spreading at fruiting, 5-12 mm long. Sepals 2-3 mm long. Petals white, c. = sepals. Siliques patent, linear, ± terete, 15-30 × 1-1.5 mm; valves with a weak median vein, or veins 0; style c. 2 mm long. Seeds reddish brown, c. 1 mm long, coarsely reticulate, in 1 row per locule.