西藏溲疏 xi zang sou shu

Deutzia corymbosa R. Brown ex G. Don var. hookeriana C. K. Schneider, Mitt. Deutsch. Dendrol. Ges. 13: 184. 1904; D. compacta Craib var. multiradiata J. T. Pan; D. corymbosa var. purpurascens C. K. Schneider; D. corymbosa var. yunnanensis Franchet ex Rehder; D. hookeriana var. macrophylla S. M. Hwang; D. hookeriana var. ovatifolia S. M. Hwang.

Shrubs ca. 2 m tall. Flowering branchlets reddish brown, 5-15 cm, 6-8-leaved, stellate hairy, hairs with conical, papilliform base. Petiole 1-4 mm; leaf blade ovate- or oblong-lanceolate, elliptic- or oblong-ovate, or ovate, or 2-8 × 1-4 cm, papery, abaxially densely 8-10(-15)-rayed stellate hairy, adaxially densely 4-6(-8)-rayed stellate hairy, indumentum continuous and grayish, base rounded or broadly cuneate, margin serrulate, apex acuminate or acute. Inflorescences corymbose, 6-12 cm in diam., 20-80-flowered, stellate hairy, hairs with papilliform base; pedicels 3-10 mm. Calyx tube ca. 2 × 2.5 mm; lobes broadly ovate, ca. 2 × 2 mm. Petals imbricate, white, broadly ovate, 6-7 × 5-6 mm. Outer stamens 6-7 mm; filaments 2-dentate at apex; anthers globose, stalks 1-1.5 mm. Inner stamens shorter than outer ones; filaments 2-lobed or truncate at apex; anthers borne near middle of filaments abaxially. Styles 3 or 4, ca. 4 mm. Capsule ca. 4 mm in diam. Fl. May-Aug, fr. Jul-Sep.

Mixed forest margins, thickets; 2000-3500 m. S Xizang, NW Yunnan [Bhutan, ?Myanmar, Sikkim].