Oogonium Antheridium- showing zygotes

Fungus can reproduce either sexually or asexually. Reproductive structures of fungi are called gametangia, if they are directly involved in the production of gametes, and sporangia, if they are involved in the production of asexual spores. The asexual phase of the life cycle is known as the anamorph, while the sexual stage of the fungus is known as the teleomorph. Sexual reproduction involves the union of two compatible fungal nuclei followed by meiotic division. Nonmotile spores are the characteristic agents of fungal reproduction and are typically dry and very small. This enables them to remain floating in the air for long periods of time thus increasing their chances of being carried to great heights and distances by air currents. Other spores are slimy and stick to the bodies of arthropods, like insects, to aid in their dispersal. Some spores are fired off in a sporangium and may travel distances of up to 2 m, which is a huge distance considering the sporangia are only 80 micrometres in diameter.

Allomyces arbuscula, sporangium with pits.