It’s leaves at the base has dark fibres

Its a mutant pyrrosia petiolosa, A type of small epiphytic fern

I have this fern that is taking over, think it’s a plumosa, not sure. Will letting the branches that are climbing super high kill the rest of the plant?

Some Korean ferns I saw on my trip to Gangwon province.

Selaginella tamariscina, rossii, and lepisorus ussuriensis