Zoidogamy

Zoidogamy is a type of plant reproduction in which male gametes (antherozoids) swim in a film of water to the female gametes. Zoidogamy is found in algae, bryophytes, pteridophytes, and some gymnosperms (others use siphonogamy). Zoidogamy is interesting evolutionary, as it provides a pathway from wind-borne and similar mechanisms to fluid-based mechanisms used in most animals. [ [http://www.pnas.org/cgi/reprint/93/21/11713.pdf Zoidogamy in fossil gymnosperms: The centenary of a concept, with special reference to prepollen of late Paleozoic conifers] ]

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