70. Rubus leucanthus Hance, Ann. Bot. Syst. 2: 468. 1852.
白花悬钩子 bai hua xuan gou zi
Rubus glaberrimus Champion ex Bentham; R. leucanthus var. paradoxus (S. Moore) F. P. Metcalf; R. leucanthus var. villosulus Cardot; R. paradoxus S. Moore.
Shrubs climbing, 1–3 m tall. Branchlets brown to purplish brown, glabrous, with sparse, curved prickles. Leaves imparipinnate, 3-foliolate, sometimes simple apically on branchlets or basally in inflorescences; petioles 2–6 cm, petiolule of terminal leaflet 1.5–2 cm, lateral leaflets shortly petiolulate, glabrous, with curved minute prickles; stipules subulate, 4–6 mm, glabrous; blade of leaflets ovate or ovate-elliptic, 4–8 × 2–4 cm, terminal leaflet slightly longer than or nearly as long as lateral leaflets, leathery, lateral veins 5–8 pairs, raised abaxially, impressed adaxially, both surfaces glabrous or adaxially slightly soft hairy, base rounded, margin sharply coarsely serrate, apex acuminate to caudate. Inflorescences terminal on lateral short branchlets, corymbose, 3–5 cm, 3–8-flowered, rarely flowers solitary in leaf axils; rachis and pedicels glabrous; bracts subulate, 3–5 mm, glabrous. Pedicel 0.8–1.5 cm. Flowers 1–1.5 cm in diam. Calyx abaxially glabrous; sepals erect, ovate, 4–7 × 3–5 mm, apex acute, shortly pointed, inner sepals with tomentose margin. Petals white, narrowly ovate or suborbicular, nearly as long as or slightly longer than sepals, base puberulous, clawed. Stamens many, somewhat shorter than petals; filaments broadened and flattened. Pistils usually 70–80, sometimes to 100 or more; style and ovary glabrous or pilose only at ovary apex and style base; torus basally subsessile or sessile. Aggregate fruit red, subglobose, 1–1.5 cm in diam., glabrous, enclosed in calyx; pyrenes foveolate. Fl. Apr–May, fr. Jun–Jul.
Sparse forests, waste places; 1000--2500 m. Fujian, Guangdong, Guangxi, Guizhou, Hainan, Hunan, Yunnan [Cambodia, Laos, Thailand, Vietnam].
The edible fruit and roots are used medicinally.