oogonium with the central uninucleate oosphere and the fertilizing tube (a) of the antheridium which introduces the male nucleus.
It is seldom that more than one antheridium applies itself to an oogonium.
Mycelium present, antheridia with antherozoids, oogonium with single oosphere: Monoblepharidaceae.
oogonium o·o·go·ni·um (ō'ə-gō'nē-əm)
n. pl. o·o·go·ni·ums or o·o·go·ni·a (-nē-ə)
The primitive egg mother cell from which the oocytes develop.