Draba parviflora (Regel) O. E. Schulz

The illustration of Draba stylaris J. Gay ex E. A. Thomas in Fl. Xinjiang. (2(2): 124. 1995) is based on misidentified plants of D. parviflora.

Herbs perennial, (3-)6-20(-25) cm tall, compactly cespitose. Caudex few branched, ultimate branches terminated in rosettes, covered with leaf remains of previous years. Stems erect, simple, hirsute throughout with simple and coarse, forked trichomes. Basal leaves rosulate, persistent; petiole to 7 mm, ciliate; leaf blade oblong or oblanceolate, (0.3-)0.7-2(-2.5) cm × (1-)2-5 mm, abaxially hirsute with sessile or subsessile, 3- or 4-rayed stellate trichomes with unbranched rays, adaxially and ciliate margin with simple, stoutish trichomes to 1 mm, base attenuate to cuneate, margin entire or 1-3-denticulate, apex acute. Cauline leaves 2-4(-8), sessile; leaf blade ovate or oblong, 0.4-1.8 cm × 1-6 mm, pubescent as basal leaves, margin entire or 1-3-toothed on each side, apex subacute. Racemes 4-20-flowered, ebracteate, elongated in fruit. Fruiting pedicels 2-4 mm, erect, often appressed to rachis, straight, hirsute all around with simple trichomes. Sepals oblong-ovate, 1.5-2 × 0.5-0.8 mm, erect, abaxially pilose, base of lateral pair not saccate, margin not membranous. Petals white, spatulate, 2-3.5 × 1-1.5 mm, apex subemarginate or rounded; claw absent. Filaments 1-1.5 mm; anthers ovate, 0.2-0.3 mm. Ovules 24-30 per ovary. Fruit oblong-elliptic to oblong, 6-11 × 1.5-2(-2.5) mm, erect, often appressed to rachis, latiseptate, not twisted; valves glabrous, obscurely veined, base and apex subobtuse; style 0.1-0.3 mm. Seeds brown, ovate, 0.9-1.1 × 0.5-0.6 mm. Fl. and fr. Jun-Aug.

Gansu, Qinghai, Xinjiang [Kazakhstan, Kyrgyzstan, Russia, Tajikistan].

Stony meadows of alpine areas, streamsides; 2700-4100 m.

Draba hirta Linnaeus var. leiocarpa Regel f. parviflora Regel, Nouv. Mém. Soc. Imp. Naturalistes Moscou 11: 51. 1859; D. subamplexicaulis C. A. Meyer var. hirsutifolia Pohle.