496 ID wild climber: 24 high res. images.
Please ID wild climber,
Location: bloomed near Vannappuram Thodupuzha Idukki Kerala INDIA
Altitude: 1500fsl
Flower date: 09SEP2023, 03.20pm
Habitat: wild moisture evergreen misty sloppy alpine
Plant habit: climbing herb, branches, weak cylindrical stem 07mm base circumference, velvety sprouts, perennial
Height: 02 meters
Leaves: opposite heart shaped acute soft smooth leathery glossy, size upto: 10×7cm
Flower: extra axillary umbel inflorescence, clustered, globular petal, diameter:22mm, greenish yellow, strange smell
Fruit: lengthy cone shaped paired, green into purple to brown
Camera: CANON EOS1500D +FL10x

Please note flower opened manually.
Fruit size:20×1.2cm.
Sharing more images.

Apocyanaceae member !

The plant having white sticky latex also. As I mentioned earlier, if it manually open the flower to see the inside, petal will wilt immediately.

My first impression is leaning towards Heterostemma sp. [Apocynaceae].

Heterostemma beddomei (Hook.fil.) Swarupan. & Mangaly Syn: Oianthus beddomei Hook.fil.

Rediscovery of Heterostemma beddomei (Apocynaceae, Asclepiadoideae) after its type collection in India over more than 150 years ago

Yes, it is Heterostemma sp.  Thank you very much dear … for Genus id of my plant,

Yes, it is very close to Heterostemma beddomei  thank you very much for ID my plant

Exact match or just close ?

I think it’s matching, only colour variation, thank you very much for providing ID link

Also known to occur in Idukki district is Heterostemma vasudevanii.
Hope somebody more familiar with this genus in Kerala can ascertain the species.

Checklist and typification of Heterostemma (Apocynaceae, Asclepiadoideae, Ceropegieae)- Rheedea Vol. 33(1): 17–21 (2023)

Sharing clear images.
3 images.

Sharing more images.
Base stem rough silverish puffed ridges 01 inch base diameter.
3 images.

Any relationship with Erythropalum……….?

It is Heterostemma spp.

I have not seen this species but it seems to match quite well with the illustration of Heterostemma beddomei (except the corona),  which is designated as lectotype in the Phytotaxa paper mentioned in one of the emails in this thread.