Two different stages in the sexual reproduction of Monoblepharis.

The left photo shows a young oogonium (cell with rich cytoplasmic contents) with an attached antheridium from which all the sperm have been released. A sperm cell may be out of focus and at the tip of the oogonium. The oogonium will have a single egg.

The right photo shows mature oospores that pop out of the oogonia following fertilization of the eggs. Several empty oogonia with the empty, attached antheridia may be seen. Some of the hyphae illustrate the foamy characteristic of hyphae in the Monoblepharidales.

Both photos courtesy of Marilyn Mollicone, Dept. of Plant Biology, University of Maine.