Many thanks, Saroj ji for the check on ID.
I found one difference among the two high altitude species that are found in the Nilgiris; it may be decisive for changing our ID to Gomphandra coriacea Wight.
I found the difference in Digital Flora of Peninsular India by Herbarium JCB:
Gomphandra coriacea Wight - inflorescence is leaf opposed
Gomphandra tetrandra (Wall.) Sleumer - inflorescence is axillary
Also, some other facts from the internet:
Gomphandra coriacea Wight - fruiting seen often on older, "naked" parts of the twig.
Gomphandra tetrandra (Wall.) Sleumer - fruiting typically found among active, green leaves.
Thus I strongly feel that the posted plant is
Gomphandra coriacea Wight
Regards.
Dinesh