Draba heilii (Heil's Alpine Whitlowgrass)
Densely caespitose perennial; caudex few-branched, compact, with persistent, thickened leaves; basal leaves imbricate, undifferentiated into blade and petiole, linear-lanceolate, 5-8 mm long, 1-1.5 mm wide, surfaces glabrous or rarely pilose, margins...