长花铁线莲 chang hua tie xian lian

Clematis nutans Royle var. thyrsoidea Rehder & E. H. Wilson; C. veitchiana Craib.

Vines woody. Branches shallowly 5--8-grooved, sparsely puberulous. Leaves usually 2-pinnate, sometimes 1-pinnate; petiole 2.8--6 cm; leaflet blades ovate to pentagonal-ovate, (2--)3.5--7 × (1.6--)3--5.8 cm, papery, 3-lobed or parted, both surfaces appressed sericeous-puberulous, base cordate, truncate, or broadly cuneate, margin dentate, apex acuminate to caudate-acuminate; basal veins abaxially ± prominent. Cymes axillary, 4- to many flowered, often paniclelike; peduncle 7--13 cm; bracts ovate to rhombic, 0.5--3.5 cm, often 3-lobed. Flowers 1.4--1.8 cm in diam. Pedicel 0.3--2.8 cm, densely puberulous. Sepals 4, yellowish, erect, oblong to narrowly oblong, 1.4--1.9 × 0.5--0.7 cm, abaxially densely appressed sericeous-puberulous, adaxially glabrous or sparsely puberulous, margin abaxially velutinous, apex ± acute and recurved. Stamens 1--1.3 cm; filaments pubescent; anthers narrowly oblong to oblong, 1.8--3 mm, glabrous or only abaxially puberulous on connective, apex obtuse. Ovaries puberulous. Style 1--1.3 cm, densely villous. Achenes ovate to suborbicular, 3--4 × 2.5--3 mm, puberulous; persistent style 2--2.5 cm, plumose. Fl. Jul--Aug, fr. Sep.

Slopes, scrub, along streams; 2000--2500 m. E Qinghai, W Sichuan, Xizang, NW Yunnan [Nepal].