Crawfurdia angustata

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Pink Gentian Vine; 
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Stems twining, terete, glabrous, internodes 6-17 cm. Petiole 0.5-1 cm, slender; leaf blade elliptic to ovate, 4-7 cm long, 2-4 cm wide, leathery, base rounded, margin entire, apex acuminate and caudate, veins 3-5. Inflorescences 1-flowered or cymes. Pedicel 1-15 cm; bractlets 1-3 pairs, lanceolate. Calyx sometimes pale purple, tubular; tube 2-2.5 cm, entire or rarely split on 1 side, apex with intracalycular membranes; lobes spreading to recurved, ovate-triangular to triangular, 3-4 mm long, 2-3 mm wide. Corolla pale purple, funnelform, 6-8.5 cm; lobes ovate-triangular, 1-1.7 cm long, 6-12 mm wide, apex acuminate; plicae broadly triangular, 2-4 mm long, ca. 5 mm wide, oblique, margin irregularly crenulate. Stamens inserted at middle of corolla tube; filaments linear-subulate, 1.5-1.8 cm; anthers ellipsoid, 5-7 mm. Nectaries ovate. Style linear, 2.5-3 cm; stigma lobes linear. Capsules ellipsoid, ca. 3 cm; gynophore less than 5 mm. Seeds light brown, triquetrous, 2-2.5 mm, broadly winged along edges.

Flowering and fruiting from October to December.
Crawfurdia angustata is occurring in SE Xizang, NW Yunnan of China, India, Myanmar.
Growing in meadow slopes, scrub, scattered forests in valleys; 1500-2800 m.
(Author(s): Wen, Jun
Rights holder(s): Wen, Jun)
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Image by Kiran Srivastava, Inserted by Gurcharan Singh (Click link to see details). 

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Crawfurdia sps. : 5 posts by 5 authors. Attachments (1).
A Photograph of Crawfurdia, possibly Crawfurdia angustata, as suggested by … of Flowersofindia. These flowers were found in an open patch in Upper Dibang Valley, Arunachal Pradesh.

Beautiful vine. I’ve not seen it before. Thanks for posting.

I checked Crawfurdia and it appears more common in parts of China etc.
It is possible that the flora of Arunachal has a lot in common with the flora of China?

During the last ice age (1,10000 yrs before present to 12,000 yrs bp) many plants from China, Siberia and Japan descended south to the S.E.Asian countries. After the ice age with global warming they moved northward once again, and many of then got shelter in the Eastern Himalayas in that course. most prominent are Primula, Rhododendron species. So no wonder you will find many chinese elements in A.P., It has no significance and relevance of China’s claim on A.P.

/wp-content/uploads/2020/10/P1060057-6.JPG/wp-content/uploads/2020/10/P1060053-5.JPGSome flowers from Arunachal Pradesh-1 : 5 posts by 2 authors.
Some flowers from Upper Dibang Valley, Arunachal Pradesh:-
1060053 & 1060057 : tubular, light purple flowers.

1060053 & 1060057 : tubular, light purple flowers.- may be Crawfurdia speciosa from Gentianaceae, see the links:
http://www.dungevalley.Crawfurdia%20speciosa.jpg (a picture),
http://flickr.com/photos/25530142@N08/2447754379/ (a picture),
http://www.kew.org/mng/gallery/249.shtml (a painting),
http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=200017872 (detailed description)

I think close to images at Crawfurdia angustata C.B.Clarke rather than those of Crawfurdia speciosa Wallich