Gametophore

Gametophores are prominent structures in seedless plants on which the reproductive organs are borne.

[citation needed][1] The word gametophore (more accurately gametangiophore) is composed of the greek ‘gamete-,’ referring (loosely) to gametangia[citation needed] and ‘-phore’ (Greek Φορά, "to be carried").

[2] In mosses, liverworts and ferns (Archegoniata), the gametophores support gametangia (sex organs, female archegonia and male antheridia).

In Bryopsida the leafy moss plant (q. v. "Thallus") is the haploid gametophyte.

[3] It grows from its juvenile form, the protonema, under the influence of phytohormones (mainly cytokinins).