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FOC | Family List | FOC Vol. 6 | Ranunculaceae | Clematis

105. Clematis siamensis J. R. Drummond & Craib, Bull. Misc. Inform. Kew. 1915: 420. 1915.

锡金铁线莲 xi jin tie xian lian

Vines woody. Branches shallowly 8-grooved, glabrous or sparsely puberulous. Leaves all ternate or distal ones simple; petiole 5--7 cm, base sparsely puberulous; leaflet blades ovate to narrowly ovate, 5.5--13 × 2.2--6.5 cm, papery, abaxially glabrous, adaxially sparsely puberulous near base, both surfaces reticulate, base rounded, margin entire, apex acuminate; basal veins abaxially prominent. Cymes axillary, often paniclelike, 1- to many flowered, glabrous; peduncle 4--5.5 cm; bracts linear, 4--7 mm. Flowers ca. 1 cm in diam. Pedicel 1.5--3.2 cm, glabrous or puberulous. Sepals 4, white, erect, oblong-lanceolate, ca. 15 × 4--5 mm, abaxially puberulous or densely so, or glabrous except for velutinous margin, adaxially puberulous only near obtuse and recurved apex. Stamens ca. 1.4 cm; filaments densely villous; anthers narrowly oblong, 2.5--3 mm, glabrous, apex obtuse. Ovaries pubescent. Style ca. 1 cm, densely villous. Fl. Oct--Dec, fr. Mar.

Forests, along streams; 1000--2400 m. SE Xizang, C and W Yunnan [Bhutan, NE India, N Myanmar, E Nepal, Sikkim, N Thailand].

1 Proximal leaves ternate, distal ones simple; cymes 1-flowered   105c var. monantha
+ All leaves ternate; cymes 3- to many flowered.   (2)
2 (1) Sepals abaxially glabrous except for velutinous margin; cymes (3--)7- to many flowered   105a var. siamensis
+ Sepals abaxially densely puberu-lous; cymes 3--9-flowered   105b var. clarkei


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