Herbs annual, 1-4 cm tall. Trichomes short-stalked and subdendritic or forked, simple ones to 1 mm on petioles and fruit. Basal leaves rosulate, smaller than cauline ones, entire, dry by flowering time. Cauline leaves several to many, often densely grouped below inflorescence; petiole 5-14 mm, ciliate with simple trichomes; leaf blade spatulate, oblanceolate, or ovate, 3-10 × 2-6 mm, sparsely pubescent, base cuneate, margin with 1-4 teeth on each side, apex obtuse. Racemes 10-to many flowered, ebracteate or rarely lowermost pedicels with adnate bracts, not elongated in fruit. Fruiting pedicels divaricate, straight, 0.5-2 cm. Sepals oblong, 2-3.5 × 1-1.5 mm, spreading, pubescent, persistent. Petals white, broadly obovate, 3-5 × 2-3 mm, persistent, apex rounded; claw 1-2 mm. Filaments 2-2.5 mm, persistent; median pairs narrowly lanceolate, winged, 0.4-0.5 mm wide; lateral pair slender, wingless; anthers reniform, 0.4-0.5 mm. Ovules 12-16 per ovary. Fruit oblong-linear, 1-2 cm × 2.5-3 mm, flattened; valves with obscure midvein and prominent marginal veins, somewhat indurated at margin and connate at base, dechiscing basipetally, not torulose, pilose with forked and/or simple trichomes; septum complete; style 0.5-1.5 mm; stigma subentire or 2-lobed. Seeds ovate, 1.2-1.6 × 0.8-1 mm; cotyledons accumbent. Fl. Jun-Jul, fr. Jul-Aug.
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