This climber in garden? Planted or natural?
Because on Vetal Tekdi and other elevated regions around Pune. This grows rampantly uncontrolled.
A climber from Aesclepediaceae
Indicative features of this family seen here are...........
Milkweed.. if you cut small branch milky sap flows.
Flowers : Pentamerous( 5 Petals), Actinomorphic, A typical pentagonous corona( for the insects to land)seen in the flower.
Seeds falttened with a tuft of hairs(See attached picture)