Wiktionary
branch off
vb. (context idiomatic intransitive English) to diverge into two or more separate paths.
Usage examples of "branch off".
Spiral vessels, accompanied by simple vascular tissue, branch off from the vascular bundles in the blade of the leaf, and run up all the tentacles into the glands.
The programs were too narrow-minded to branch off into other plot lines, too stupid to stop and wait if you got up to change your personality or check your portfolio.
He cast a glance over his shoulder to keep track of Uulamets while he jerked and broke the thorn branch off Sasha's pack, tearing his hand again, but Uulamets was only a fading grayness in the dark, paying him no heed.