鄂西绣线菊 e xi xiu xian ju

Spiraea atemnophylla H. Léveillé.

Shrubs to 4 m tall. Branchlets arching, red-brown to gray-brown, slender, terete, slightly angled, pubescent when young, later glabrous; buds ovoid, small, with several scales, pubescent, apex acute or obtuse. Petiole 2–3 mm, thinly pubescent; leaf blade abaxially gray-green, glaucescent, adaxially green, oblong, elliptic, or obovate, 1.5–3 × 0.7–1 cm, abaxially sometimes thinly pubescent, adaxially glabrous, inconspicuously pinnately veined, base cuneate, margin entire, apex obtuse or mucronulate. Corymbs terminal on lateral branchlets, compound, dense, 4–8 × 4.5–7 cm, numerous flowered; rachis and pedicels densely thinly pubescent; pedicels 3–4 mm. Flowers 4–5 mm in diam. Hypanthium campanulate, puberulous abaxially. Sepals triangular, 1–1.5 mm, erect in fruit, apex acute. Petals white, ovate or suborbicular, 1.5–2 × 1–2 mm, glabrous, base shortly clawed, apex obtuse. Stamens ca. 20, somewhat longer than petals. Disk annular, 10-lobed; lobes shallow, apex usually slightly emarginate. Carpels subglabrous; styles shorter than stamens. Follicles spreading, small, glabrous; styles terminal on abaxial side, divergent. Fl. May–Jul, fr. Jul–Oct.

Thickets, grasslands; 2000--3600 m. Gansu, Guizhou, Henan, Hubei, Shaanxi, Sichuan, Yunnan.