灰叶悬钩子 hui ye xuan gou zi

Rubus nagasawanus Koidzumi var. arachnoideus (Y. C. Liu & F. Y. Lu) S. S. Ying.

Subshrubs. Branchlets densely grayish appressed tomentose, with few small prickles. Leaves simple; petiole 1.5–2 cm, grayish tomentose; stipules 4–6 mm, much lacerate, grayish tomentose; blade ovate to broadly ovate, 5–7 × 4–6 cm, palmately 5-veined, veins raised abaxially, slightly impressed adaxially, abaxially densely grayish appressed tomentose, adaxially dark brownish, glabrous or slightly pubescent along veins, base broadly cordate, margin unevenly dentate, 3–5-lobed, terminal lobe 3–4 × 3–3.5 cm, lateral lobes smaller, apex obtuse or acute. Inflorescences terminal, cymose panicles, much branched, to 17 × 13 cm; rachis and pedicels grayish tomentose. Pedicel 0.8–2 cm, bracts linear or linear-lanceolate, slightly lacerate, grayish tomentose. Calyx cupular, 5–6 mm in diam., abaxially grayish tomentose; sepals triangular or triangular-ovate, 4–6 × 2–3 mm, apex acute. Petals white, broadly obovate or obovate-spatulate, 4–5 × 3–4 mm, both surfaces sparsely pubescent, base shortly clawed; torus densely villous. Stamens many; filaments free or connate at base, ca. 3 mm, glabrous. Pistils glabrous; styles 3–4 mm. Fruit not seen. Fl. Jul–Sep(–Dec).

Broad-leaved forests; (300--)1500--1800 m. E Taiwan.

No specimens have been seen by the present authors. Specimens under this name at HAST have been annotated by Naohiro Naruhashi as Rubus tephrodes (Ching-I Peng, pers. comm.).