sahayven, the term is inosculation. It's when branches, trunks, or even roots of woody plants become conjoined, self grafting. It happens in nature readily when plants of the same species grow very close to each other. Ornamental grafting is also practiced as a hobby and art form.

I was also going to say Inukshuk. It's an Inuit term and was originally used to describe stacked rocks used as directional signs across the Canadian north.

I imagine a local handyman could help you.

Thanks