Description from Flora of China
Spiraea tibetica T. T. Yü & L. T. Lu, Acta Phytotax. Sin. 18: 491. 1980, not S. thibetica Bureau & Franchet (1891).
Shrubs to 1.5 m tall. Branchlets red-brown or gray-brown, terete or sparsely angled, pubescent, glabrous when old; buds ovoid, small, with several scales, pubescent. Leaves fascicled; petiole almost absent; leaf blade glaucous bloomed abaxially, oblong-obovate or narrowly elliptic-lanceolate, 7–15 × 2–5 mm, pubescent on both surfaces, base cuneate, margin entire, apex subobtuse or acute. Racemes pedunculate, umbellate, 15–30-flowered; pedicels 3–6 mm, glabrous; bracts linear, glabrous. Flowers 5–7 mm in diam. Hypanthium campanulate, glabrous abaxially. Sepals triangular or triangular-ovate, erect in fruit, apex obtuse or acute. Petals pinkish to purple-red, suborbicular or obovate, base shortly clawed, apex obtuse. Stamens 15–20, nearly equaling petals; anthers yellowish. Disk 10-lobed. Carpels glabrous or puberulous. Follicles spreading, glabrous or pilose on adaxial suture; styles on abaxial side, suberect. Fl. May–Jun, fr. Aug–Sep.
Thickets on slopes, river banks; 4200--4300 m. Xizang.