105. Rubus assamensis Focke, Abh. Naturwiss. Vereine Bremen. 4: 197. 1874.
西南悬钩子 xi nan xuan gou zi
Rubus bahanensis Handel-Mazzetti; R. qinglongensis Q. H. Chen & T. L. Xu; R. sepalanthus Focke.
Shrubs climbing. Branchlets brownish to purplish brown, terete, yellowish gray villous, with curved minute prickles. Leaves simple; petiole 5–10 mm, gray or yellowish gray villous; stipules caducous, free, broadly obovate or flabellate, 0.9–1.1 cm, palmately laciniate lobed, lobes linear to linear-lanceolate, villous; blade oblong, ovate-oblong, or elliptic, 6–11 × 3.5–6 cm, lateral veins 5 or 6 pairs, abaxially densely gray or yellowish gray tomentose and villous along veins, adaxially villous, more densely so along veins, base rounded, rarely subtruncate, margin unevenly serrate, serrations apiculate, sometimes divided basally, apex acuminate. Inflorescences terminal or axillary, cymose panicles, 10–20 cm, many flowered; rachis and pedicels gray or yellowish gray villous, occasionally with sparse, minute glandular hairs; bracts obovate or subflabellate, 6–9 mm, villous, deeply lobed; lobes linear or lanceolate. Pedicel 7–11 mm. Calyx densely gray or yellowish gray tomentose and villous; sepals erect in fruit, ovate, 4–6 × 3–4 mm, apex long acuminate. Petals usually absent. Stamens many, somewhat shorter than or nearly as long as sepals; filaments linear. Pistils 10–15(–20), shorter than stamens, often glabrous. Aggregate fruit red when immature, black at maturity, subglobose, ca. 8 mm in diam., with several drupelets; pyrenes slightly rugose. Fl. Jun–Jul, fr. Aug–Sep.
Mixed forests, forest margins; 1400--3000 m. Guangxi, Guizhou, Sichuan, Xizang, Yunnan [NE India, NE Myanmar].