Oedogonium
Oedogonium reproduces asexually by fragmentation and by producing large, wallless zoospores with an eyespot, contractile vacuoles, and a ring of flagella. The motile zoospores are released from the parent cells and move to a suitable substrate. The flagella break down and secure the developing zoospore so that a new filament is able to develop by cell division.
 
 
Oedogonium reproduces sexually by producing oogonia, which each contain a single large nonflagellate egg cell, and antheridia, which
contain small sperm with multiple flagella.
Some species are monoecious and can self-
fertilize. Dioecious species produce either the
egg or the sperm and thus require two filaments
for fertilization to occur, which increases genetic diversity. Some species produce dwarf male
plants that grow near the oogonia.