Herbs annual, 2-10 cm tall. Trichomes short-stalked and subdendritic or forked, subsessile and submalpighiaceous-stellate on leaves, stems, pedicels and fruit, rarely simple along leaf margin. Basal leaves rosulate, smaller than and somewhat similar to cauline ones, dry by flowering time. Cauline leaves few to many, often densely grouped below inflorescence; petiole 3-10(-25) mm, ciliate with simple subsetose trichomes; leaf blade spatulate or oblanceolate, 3-12 × 2-7 mm, base attenuate, margin dentate or pinnatifid and with 1-4, oblong or linear lateral lobes 1-5 × 0.5-1 mm on each side, apex obtuse. Racemes 8- to many flowered, ebracteate or sometimes lowermost pedicels with adnate bracts, not elongated in fruit. Fruiting pedicels divaricate, straight, 1-3.5 cm. Sepals oblong, 2-3.5 × 1-1.5 mm, spreading, sparsely pubescent, persistent. Petals yellow, broadly obovate or spatulate, 3-5.5 × 1.5-4 mm, persistent, apex emarginate or rounded; claw 1-2 mm. Filaments 2-3 mm, persistent; median pairs with oblong or obovate wing 0.5-0.9 mm wide, unexpanded portion of filament to 0.6 mm; lateral pair entire or winged; anthers reniform, 0.3-0.5 mm. Nectar glands ovate, to 0.2 mm. Ovules 12-28 per ovary. Fruit narrowly linear, 1.5-2.5 cm × ca. 1 mm, terete; valves torulose, densely covered with submalpighiaceous trichomes; septum complete; style 0.5-2 mm; stigma ca. as wide as style, entire. Seeds oblong, 1-1.4 × 0.5-0.6 mm; cotyledons accumbent. Fl. Jun-Jul, fr. Jul-Aug.