216. Saxifraga coarctata W. W. Smith, Rec. Bot. Surv. India. 4: 194. 1911.
矮虎耳草 ai hu er cao
Saxifraga humilis Engler & Irmscher.
Herbs perennial, cespitose, 1.4-4 cm tall. Flowering stem very short at anthesis, embedded among rosette leaves and not visible, gradually elongating to 3 cm after anthesis and in fruit, densely glandular hairy. Basal leaves aggregated into a rosette, subspatulate, 0.6-1.6 cm × 1.3-4 mm, both surfaces usually glabrous, margin entire or 2- or 3-dentate, glandular pilose, apex acute. Cauline leaves 5.6-12 × 1.5-3.4 mm, abaxially and marginally usually glandular pilose, base sometimes gemmiferous in leaf axil, apex acute. Flower solitary or cyme 2-flowered; bracts oblong, 3-6.5 × 0.7-2.4 mm, abaxially and marginally glandular pilose, apex acute; pedicels initially 1.3-2 mm, elongating to 1.2 cm in fruit, glandular pubescent. Sepals erect, ovate or broadly so to subelliptic, 1.5-2.7 × 1-2 mm, abaxially and marginally glandular hairy, veins 3, not, partly, or fully confluent at apex, apex obtuse. Petals white, broadly to narrowly obovate to subelliptic, 3-5.6 × 1-3.4 mm, not callose, 3-6-veined, base clawless, apex obtuse. Stamens 1.5-3 mm. Ovary subinferior, 2-2.2 mm; styles 1.1-1.5 mm. Fl. and fr. Jun-Sep.
Alpine scrub meadows, rock crevices; 3800-4700 m. Sichuan, Xizang, NW Yunnan [Bhutan, Nepal, Sikkim].