The elusive plant

I have a website, www.greencoverinitiative.com, a Covid-time initiative, which is a catalog of plants and trees around us. I currently have around 500 species listed there, and it continues to grow:)

There is this one plant I noticed first in Goa, growing in the wild. I have 4 plant identification apps on my phone, and none of them gave a good answer as to the botanical name of this plant. Also, noticed the same plant growing in the wild EVERYWHERE, in Thrissur, Kerala.

I am part of a Google group, which has many experts in botany, who help with identifying plants. I posted there too, and the answer I got was Ampelocissus latifolia or Wild grapes.

Reached out to a couple of personal contacts, and I got the name Merremia vitifolia or Grape-leaf wood rose.

Now, Ampelocissus latifolia produces small purple grape-like fruits, and Merremia vitifolia produces yellow flowers. I have been observing this plant from June to Dec 2024, and it has not, so far, produced any flower, fruit, or seed.

When I went to Kerala this Christmas holidays (Dec 2024), my husband Seby and I went for morning or evening walks on most days. And I kept seeing this plant, mocking me with it nameless-ness.

I have also asked my relatives to keep a lookout for this plant, whether it will flower, or fruit, or reveal any other signs that would help me identify it. Anybody here who can help me ID the plant? HELP!!