Herbs perennial, 5-15 cm tall, densely cespitose, scapose. Caudex often many branched, ultimate branches terminated in rosettes and covered with papery leaf remains of previous years. Stems erect, slender, simple, glabrous throughout or distally, often sparsely pubescent proximally with minute, forked or stellate trichomes. Basal leaves densely rosulate, persistent, sessile; leaf blade linear or linear-oblong, (2-)4-15 × (0.5-)0.7-1.8(-2.5) mm, sparsely to densely pubescent with subsessile, forked or stellate trichomes, often glabrous adaxially, rarely so on both surfaces, always ciliate with setose or subsetose simple trichomes to 1 mm, base subobtuse, margin entire, apex obtuse to acute; midvein prominent abaxially almost to apex, narrower than blade on each side. Cauline leaves absent, if 1 then sessile, oblong. Racemes 3-10(-15)-flowered, ebracteate, elongated in fruit. Fruiting pedicels 2-7 mm, divaricate-ascending, straight or slightly curved, glabrous or rarely sparsely pilose all around. Sepals oblong, 1.5-2 × 0.7-1 mm, erect, glabrous or abaxially pubescent with simple and forked trichomes, base of lateral pair not saccate, margin narrowly membranous. Petals yellow, narrowly obovate, 3-4 × 1-1.5 mm, apex emarginate. Filaments 1.5-2 mm; anthers ovate, 0.2-0.3 mm. Ovules 12-16 per ovary. Fruit elliptic-ovate, rarely oblong-lanceolate, 6-10 × (1.5-)2.5-3.5 mm, latiseptate, sometimes slightly twisted; valves glabrous or rarely puberulent, obscurely veined, base obtuse, apex acute; style 0.4-0.7 mm. Seeds brown, ovate, 1-1.4 × 0.6-0.7 mm. Fl. Jun-Jul, fr. Jul-Aug.
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