Dense, more or less hemispherical, perennial herb or sub-shrub from a branched, woody caudex, 1-3 dm high; stems and leaves pubescent with appressed, 3-rayed to dendritic trichomes; leaves alternate, succulent, (18-)22-40(-48) mm long, (4-)6-12(-14) mm wide, oblanceolate to spatulate, margins entire or, rarely, obscurely sinuate-dentate; inflorescences compact, ebracteate racemes (1.5-)2-4.5(-6.5) cm long, equaling or slightly exceeding the leaves; pedicels ascending to divaricate, (3-)4-9(-13) mm long; flowers white, conspicuous, 1-1.5 cm wide; sepals 4, green, pubescent, (3-)4-6 mm long, 1-1.5 mm wide, broadly lanceolate; petals 4, white and rarely fading to pale lavender, glabrous, 7-9 mm long, 3.5-4.5 mm wide, obovate to broadly spatulate, attenuate at the base; stamens weakly tetradynamous, 2.5-5.5 mm long, about equaling the sepals; carpels 2, connate, ovary tomentose, 2-4 mm long, style glabrous, 1.3-2.2 mm long; fruit an obcompressed (angustiseptate), oblong silique, crispate (tortulose) and usually incurved, 5-12(-16) mm long, 2.2-3 mm wide, with 20-40 seeds. Flowering late July to early September.