Clematis acuminata

Clematis acuminata DC., Syst. Nat. 1: 148 1817. (syn: Clematis acuminata var. sikkimensis Hook. fil. & Thomson; Clematis acuminata var. wallichii Hook. fil. & Thoms.; Clematis trinervis Buch.-Ham. ex DC.);
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Pakistan to Assam: Assam, China South-Central, East Himalaya, India, Myanmar, Nepal, Pakistan, West Himalaya as per POWO;
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India (Himachal Pradesh, Uttar Pradesh, Garhwal, West Bengal, Arunachal Pradesh, Nagaland, Assam, Meghalaya), Sikkim, Nepal, Bhutan, Myanmar [Burma] (Kachin, Sagaing) as per CoL;
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A Slender woody climber. Branches Purplish red, ribbed, glabrous, with a few scattered hair. Leaves opposite, pinnately 3-foliolate; petioles ribbed, ca. 5-7 cm long; petiolules ca. 5-10 mm long; lateral leaflets ca. 5-9 x 2.5-4 cm, terminal leaflets 8-11×3.5-7.5 cm, ovate- lanceolate or oblong -lanceolate, subcuneate, rounded or subcordate at base, acute to acuminate at apex, glossy, glabrous or sparsely pubescent; palmately 5-nerved. Inflorescences axillary, trichotomously branched panicles, few to many- flowered, glabrous or sparsely pubescent; peduncles ca. 3-4 cm long, puberculous; bracts linear- lanceolate, ca. 3-5 mm long; pedicels ca. 2-3 cm long, puberulous; flowers completely tomentose in bud, ca. 2-3 cm across when fully open, pale yellow; Sepals 4, ovate or oblong- lanceolate, acute, erect or recurved at tip, ca. 10-17 x 4-7 mm, completely pubescent or only along the margins outside, puberulous inside; filaments linear, up to 1 cm long, densely hairy; anthers straight, ca. 3mm long. Fruit: Achenes, ovate, compressed, ca. 3 cm long, silky hairy: style up to 2 cm long, feathery-plumose, longer towards base.
Flowering: October- February. Fruiting: November- April
(Attributions: Ayyappan. N & V. Kokilavani, French Institute of Pondicherry, Compiled from various sources listed in the reference as per India Biodiversity Portal)
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Clematis acuminata DC.: 5 very high res. images.