| Since the asexual gametophyte does not form antheridia or archegonia, crosses to confirm its genotype could not be performed. |
| In the rotting tissues branches of the older mycelium similarly swell up and form antheridia and oogonia. |
| Fern gametes are free-swimming and a thin film of water is required for the male gametes to travel from the antheridia into the neck of the archcgonia to fertilize the eggs. |
| Studies on development of antheridia and antheridial dehiscence have been conducted by Davie and Hartman. |
| The parent also contains antheridia which produce sperm and an oogonium which produces the egg. |
| Notwithstanding their general similarity, the archegonia of mosses differ externally from antheridia in having a longer neck and longer stalk. |
