Clematis zemuensis

Clematis zemuensis W.W.Sm., Rec. Bot. Surv. India 4: 166 1911. ;
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Sikkim, Nepal, Bhutan as per Catalogue of Life;
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Similar to C.gouriana but leaves bipinnate, leaflets ovate, smaller, 1.5-3 x 1-2.5cm, acute or acuminate, base rounded, margins coarsely toothed or lobed, sparsely and finely pubescent on both surfaces; panicles branching into 5-7 straight, erect pedicels 5-6cm; sepals 4-6, elliptic, 1.5 x 0.3-0.5cm, acute, yellowish-white, sparsely pubescent; filaments glabrous; achenes pubescent.

Fl. July-August
General habitat- Juniper/Rhododendron scrub
(Attributions- A.C.J Grierson & D.G Long. Flora of Bhutan. Published by RBGE. 1984 from Bhutan Biodiversity Portal)
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/wp-content/uploads/2020/10/DSC_0873-9-6.JPGSK2071 24 July 2019 : 4 posts by 2 authors. Attachments (9)- around 700 kb each.

Location:  Phulchoki, Lalitpur
Date:  3 July 2019
Elevation:  2657 m.
Habit : Wild
Which Clematis? 
Leaflet size is smaller and thinner compared to others.
I could find the keys as below from the thesis Systematics of Clematis in Nepal, the evolution of tribe Anemoneae … by Alan C Elliott:
1a Stamens completely glabrous…….2
1b Stamens hairy at least in part….……..10
2a Flowers in axillary or terminal inflorescences………..3
2b. Flowers solitary in leaf axils….………..8
3a Connective not protruding beyond tip of anther…….. 15. C. puberula
3b Connective protruding beyond tip of anther…………..4
4a Staminodes present. Leaves pinnate, with apical leaflets modified into tendrils………..21.C. zeylanica
4b Staminodes absent. Leaves simple, ternate, pinnate, bipinnate but lacking tendrils……..5
5a Leaves simple. Flowers brown. …………17. C. smilacifolia
5b Leaves ternate, pinnate or bipinnate. Flowers white, creamy white, whitish yellow…….6
6a Inflorescence 3–7-flowered cyme. Sepals narrowly ovate or oblong, 10–20 X 5–6 mm ……….20. C. zemuensis
Pl. check the features as given in the Bold for your suggested species.
Also check with high resolution specimen in GBIF
You may be right, but I am not sure. 

Also check your other postings with this pdf document, which also gives images of some 5 or 6 species found in Nepal.

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Clematis zemuensis W.W.Sm.: 7 high res. images.

Location: Phulchoki, Kathmandu
Date:  08 July 2023
Elevation:  2483 m.
Habit : Wild