You’ve caught these two in the act of inosculation. Botanically, it means that two trees have grown together, or grafted, one to the other.

Living bridges. Technical University of Munich (TUM) Journal Scientific Reports DOI 10.1038/s41598-019-48652-w ...

SWD work brings inosculation to light on East Coast Road Self-grafted, a banyan tree and two Indian ash trees stand as one and look upon State Highways’ infrastructural work ...