Although the sporophyte is very long-lived, the fern gametophyte is normally ephemeral. It develops in a very microenvironment characterized by minor competition from other vegetation (which include even mosses and algae); uncovered humus, decomposing plant supplies, or fresh mineral surfaces; deep to average shade; in addition to a humid atmosphere. https://balloon-arch-frame87420.tnpwiki.com/7011177/detailed_notes_on_ballon_arch