Perennial herb, not cespitose; caudex few to several branched. Stems (2-) 4-10(-12) cm, erect to ascending or rarely subdecumbent. Basal leaves rosulate; petiole 2-5 mm, leaf blade narrowly oblanceolate, 5-12 ? 1-2 mm, both surfaces moderately pubescent with stalked, 4(-7)-rayed trichomes, cauline leaves (8-)10-16(-20), overlapping, lanceolate to oblong or narrowly ovate, entire or rarely denticulate. Racemes 6-15-flowered, corymbose, elongated in fruit. Sepals green with white margin, ovate, 1.5-2 mm, ascending, pubescent. Petals white, oblanceolate, 3-3.5 ? 1-1.5 mm; filaments white, 1.5-2 mm. Fruit (immature) narrowly oblong, 6-8 ? ca. 1.5 mm, slightly twisted, sessile, divaricate-ascending, not appressed to rachis; valves puberulent with simple and 2(-4)-rayed trichomes. Flowers in July to early August.