Gametophore
Gametophores are prominent structures in seedless plants on which the reproductive organs are borne. The word gametophore and ‘-phore’. In mosses, liverworts and ferns, the gametophores support gametangia. If both archegonia and antheridia occur on the same plant, it is called monoicious. If there are separate female and male plants they are called dioicious.
In Bryopsida the leafy moss plant is the haploid gametophyte. It grows from its juvenile form, the protonema, under the influence of phytohormones. Whereas the filamentous protonema grows by apical cell division, the gametophyte grows by division of three-faced apical cells.