Saxifraga chumbiensis Engl. & Irmsch.

Herbs perennial, cespitose, 6.5-10.5 cm tall. Stem brown glandular pilose. Basal leaves with petiole 0.6-2 cm, adaxially and marginally brown pilose; leaf blade elliptic to oblong, 5-12 × 2.5-4.5 mm, adaxially and marginally pilose, base subcuneate, apex acute. Cauline leaves with petiole 0.2-0.8 mm; leaf blade elliptic or oblong to lanceolate, 5-10 × 2.5-4 mm, adaxially and marginally brown pilose, base subcuneate, apex acute. Flower solitary; pedicel 0.5-1.5 cm, brown pilose. Sepals erect to spreading, ovate, 4-5.5 × 2-2.9 mm, both surfaces glabrous, veins 5, confluent at apex, margin brown glandular pilose, apex acute. Petals yellow, obovate, 6-7.5 × 4-4.2 mm, not callose, 5-veined, base with a claw 1-1.3 mm, apex retuse. Stamens ca. 4.5 mm. Ovary broadly ovoid, ca. 2.8 mm; styles divergent, ca. 1.9 mm. Fl. Jul-Aug.

S Xizang (Yadong Xian) [Bhutan, Sikkim].

Rock crevices on slopes; 4600-5800 m.