Vine-like plant that eventually melds with others of its kind?

Question

Is there any crawling plant that, when it's crawling among others of its species, will actually grow into one another and eventually share veins?

Unrelated: this is for a project to provide a living shade canopy over a suburban street.

Answer 1

Most trees have fungi that share nutrients with them. Trees can share nutrients through these underground networks of mycelia or can do so in a more direct manner by grafting branches together.

If you had a vine with a woody stem structure you could probably graft together different plants or they might naturally grow together in a process called inosculation which is often found when you pleach trees together.

I don't know of any crawling plant that you could use but many trees and some vines are potential candidates.