Herbs perennial, 5-25 cm tall, scapose. Caudex with many, slender, creeping branches, sparsely covered with petiolar remains of previous years. Sterile stems subdecumbent, sparsely to densely hispid with malpighiaceous trichomes; flowering scapes sparsely pilose proximally with simple trichomes, often glabrous along distal half. Basal leaves subrosulate or not rosulate; petiole to 1 cm, persistent; leaf blade oblong-lanceolate or oblanceolate, 0.4-2.2 cm × 1-5(-10) mm, sparsely or densely hispid or strigose with appressed, malpighiaceous trichomes, these sometimes with 1 or 2, shorter lateral branches and appearing 3-fid or cross-shaped, sometimes adaxially or both surfaces glabrous except for margin, base attenuate, margin entire, always with malpighiaceous trichomes, apex acute. Cauline leaves of flowering stems absent, those of sterile shoots similar to basal ones. Racemes 7-20-flowered, ebracteate, glabrous, elongated considerably in fruit. Fruiting pedicels 0.5-1.8(-2.3) cm, divaricate, straight or curved, often filiform, glabrous. Sepals oblong or ovate, 2-2.7 × 0.9-1.2 mm, erect, glabrous or abaxially sparsely pilose with simple trichomes, base of lateral pair subsaccate, margin not membranous. Petals yellow, narrowly obovate, 4-6 × 2-3 mm, apex emarginate. Filaments 2-2.5 mm; anthers ovate-subcordate, 0.4-0.5 mm. Ovules 24-30 per ovary. Fruit oblong to elliptic, rarely sublinear, 4-8 × 1.5-2.2 mm, latiseptate, not twisted; valves glabrous, obscurely veined, base and apex subobtuse; style 0.5-1 mm. Seeds brown, ovate, 0.9-1.2 × 0.5-0.6 mm. Fl. May-Jul, fr. Jun-Aug. 2n = 16.
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Perennials; (stoloniferous); caudex branched (sparsely covered with persistent petiole remains, branches slender, creeping); scapose. Stems (subdecumbent when sterile), unbranched, 0.5-2.5 dm, sparsely to densely hispid, trichomes malpighiaceous, (flowering scapes sparsely pilose proximally with simple trichomes, often glabrous on distal 1/2). Basal leaves rosulate; petiolate; blade oblong-lanceolate or oblanceolate, 0.4-2.2 cm × 1-5(-10) mm, margins entire, surfaces often pubescent, sometimes glabrous (except margins), with appressed, malpighiaceous trichomes (these sometimes with 1 or 2 shorter, lateral branches, appearing 3-fid or cross-shaped). Cauline leaves 0. Racemes 7-20-flowered, ebracteate, considerably elongated in fruit; rachis not flexuous (straight), glabrous. Fruiting pedicels divaricate, straight or curved, (often filiform), 5-18 (-23) mm, glabrous. Flowers: sepals (erect), oblong or ovate, 2-2.7 mm (lateral pair subsaccate basally), glabrous or abaxially sparsely pilose, (trichomes simple); petals yellow, narrowly obovate, 4-6 × 2-3 mm, (apex emarginate); anthers ovate-subcordate, 0.4-0.5 mm. Fruits usually oblong to elliptic, rarely sublinear, plane, flattened, 4-8 × 1.5-2.2 mm; valves glabrous, (obscurely veined); ovules 24-30 per ovary; style 0.5-1 mm. Seeds (brown), ovoid, 0.9-1.2 × 0.5-0.6 mm. 2n = 16.
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