Herbs annual or biennial, 3-10 cm tall. Trichomes malpighiaceous mixed with 3(or 4)-forked ones. Stems erect, simple at base. Basal and lowermost cauline leaves subrosulate; petiole 2-7 mm; leaf blade narrowly oblanceolate, flat, 0.7-3 cm × 2-7 mm, base attenuate, margin sinuate-dentate or dentate, apex acute. Upper leaves subsessile, usually smaller than basal, predominantly with 3-forked trichomes adaxially, entire or dentate. Racemes corymbose, densely flowered, ebracteate, elongated in fruit. Fruiting pedicels divaricate, 2-6 mm, stout, narrower than fruit. Sepals linear-oblong, 4-6 × ca. 1 mm. Petals yellow, spatulate, 7-10 × 1.8-2.5 mm, apex rounded; claw subequaling sepals. Filaments yellow, 4.5-6.5 mm; anthers linear-oblong, 1.5-2 mm. Ovules 30-40 per ovary. Fruit narrowly linear, subterete, 2-3.5 cm × ca. 1 mm, somewhat torulose, divaricate-ascending, straight or curved upward; valves pubescent outside with malpighiaceous and 3(or 4)-forked trichomes, glabrous inside; style stout, 1-2 mm, cylindric, sparsely pubescent; stigma entire or slightly 2-lobed. Mature seeds not seen. Fl. Jun-Jul, fr. Jul-Aug.
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