Glab. to sparsely hairy herb up to 10 cm. tall, us. less, stock rather stout, branched above. Lvs radical, on slender petioles up to c. 5 cm. long, ± deeply trilobed, sts almost trifoliolate, sts entire, rarely with a further small pair of pinnules. Infl. us. branched; fls few, on slender spreading peduncles up to 2 cm. long; sepals oblong, c. 2 cm. long, margins hyaline; petals white, c. (5)-7-10 mm. long, broad-ovate, claw narrow, c. 2 mm. long. Siliques up to 2.5 cm. long, narrow, spreading; style very slender. Seeds c. 30.

n = 24

Perennial herb with short stout rootstock. Stems erect, glabrous, straight, purplish or green, to 30 cm tall. Lvs glabrous, rarely ciliate on petiole, purplish to dull green, ± coriaceous. Basal lvs long-petiolate, entire or with 1-2 pairs of subsessile or stalked pinnae; terminal leaflet > laterals, entire, broadly ovate, obtuse, subcordate to abruptly cuneate at base; lateral leaflets elliptic, entire. Cauline lvs few or 0, similar to basal but with narrower leaflets and cuneate terminal leaflet. Infl. racemose, glabrous, straight, (3)-10-18 cm long. Pedicels glabrous, erecto-patent, 15-25-(40) mm long at fruiting. Sepals glabrous, usually purplish, 2-4 × 1-1.5 mm. Petals white, spreading, spathulate, 6-10 × 2.5-5.5 mm. Stamens 6. Silique greenish brown to purplish, erecto-patent, (10)-20-35-(40) × 1-1.5 mm; valves glabrous; style 2-3.5 mm long. Seeds oblong, pale brown, c. 1 mm long.