Pottsia laxiflora (BI.) O. Kuntze, Revis. Gen. Pl. 2: 416 1891. (Syn: Euthodon paniculata Griff.; Parapottsia hookeriana (Wight) Miq.; Parapottsia laxiflora (Blume) Miq.; Parsonsia ovata Wall. ex G.Don; Pottsia cantonensis Hook. & Arn.; Pottsia hookeriana Wight; Pottsia inodora Pit.; Pottsia laxiflora var. pubescens (Tsiang) P.T.Li; Pottsia ovata (Wall. ex G.Don) A.DC.; Pottsia pubescens Tsiang; Teysmannia hookeriana (Wight) Miq.; Teysmannia laxiflora (Blume) Miq.; Vallaris laxiflora Blume);
Assam to S. China and Lesser Sunda Islands (Bali): Assam, Bangladesh, Cambodia, China South-Central, China Southeast, Hainan, Jawa, Laos, Lesser Sunda Is., Malaya, Myanmar, Sumatera, Thailand, Vietnam as per POWO;

Hook. & Arn. Bot. Beech. Voy. 199, t. 43 ; Benth. Fl. Hongk. 222 ; Kurz For. Fl. ii. 190. P. Hookeriana, Wight Ic. t. 1306 bis. P. ovata, A. DC. Prodr. viii. 442. Parsonsia ovata, Wall. Cat. 1630. Teysmannia laxiflora and Hookeriana, Miquel Fl. Ind. Bat. ii. 455, 456, and Parapottsia, Addenda, 1080. Vallaris laxiflora, Blume Bijd. 1043. Euthodon paniculata, Griff. Notul. iv. 84 ; Ic. Pl. Asiat, t. 458, fig. 2.

SILHET ; De Silva. ASSAM ; Jenkins. CACHAR ; Keenan, TENASSERIM ; Kurz. MALACCA ; Maingay.—DISTRIB. Java, S. China.

Branches slender, smooth, cylindric ; twigs puberulous. Leaves 3-4 by 1.1/2-2 in., elliptic-ovate or ovate, acuminate, base rounded or subcordate, nerves 4-6 pairs ; petiole slender, 1-1.1/2 in. Cymes drooping, long-peduncled, very many-fld. ; branches slender, ultimate with racemose flowers ; pedicels slender, 1/2 in. ; bracts minute, ovate. Sepals broadly ovate, obtuse. Corolla 1/4-1/3 in., glabrous, rose-coloured, tube broad obtusely angled, lobes short ovate. Follicles 1 ft., flexuous, smooth, thinly coriaceous. Seeds 1 in., very slender, glabrous, coma as long.—Griffith in his generic character of Euthodon describes the throat of the corolla as without scales ; in the specific he mentions 5 glands in the sinus of the lobes ; these I do not find in his specimens.

(Attributions- IBIS Flora (Flora of British India))

ID plz_RKC09_180811 : Attachments (3). 4 posts by 4 authors.

ID plz.
Habit: Climber
Loc.: Itanagar, Arunachal Pradesh (ca 280msl)
Date: March, 2009

Looks like a Cynanchum sp., not sure but.

Pl confirm whether mily latex was there ?? and is there any foetid smell ?

Flowers remembering Tylophora Genus,

If you post high resolution images, maybe we are able to nail it.

Vincetoxicum longifolium (Wight) Kuntze ??

I do not think matches with GBIF specimens – onetwo and three

Please, check probability of Gymnema inodorum –

There is a negative point, though – as per Flora of China – corolla yellow.

I apologize, wrong id, we have  G. inodorum – https://sites.google.com/site/efloraofindia/species/a—l/a/apocynaceae/marsdenia/marsdenia-tingens

Flower may not match !

Will try again, Sir.

Meanwhile, what about this? –
  1. flower – GBIF image
  2. bud(s) – GBIF
  3. located at – https://www.gbif.org/species/9338228

I do not think it matches.

Agreed, Sir ji, and I do not have an alternative!

…, this upload gave me a lesson – for the past few days I thoroughly checked, multiple times, the Asclepiads of FBI !!!

It’s not a member of Asclepiadaceae!
It is Pottsia cantonensis Hook. & Arn., accepted name Pottsia laxiflora (Blume) Kuntze. Please check –