This is air layering propagation at work, where the mature tree or plant is cloned from a stem that is still attached to it.

Layering is a simple form of propagation which consists of bending ... but will often root with no special treatment. Air layering works in a very similar way to conventional layering, except ...

Monstera can be propagated three ways—from stem cuttings rooted in water or soil and by air layering. Ahead, horticulturists explain how to propagate monstera the right way. Spring and summer ...