Polypodiopsida Polypodiophyta Plantae Flora and Fauna

This is much the largest order of ferns with about 35 families, 320 genera and 10,500 species. Members are homosporous, meaning the spores they produce are all alike. These spores are borne in sporangia, which are ofter clustered together in heaps called sori. The spores germinate to produce free-living gametophytes which are inconspicuous and grow in moist places. These then produce male and female reproductive structures. When they have been fertilized, new plants grow from the female gametophytes.

• Alternation of Generations in Ferns - Photographic study by Anne Bruce of fern reproduction polypodiophyta with fine macroscopic and microscopic images.
• Treeferns Down Under - Photographs of treefern species (mainly Cyathea and Dicksonia) polypodiopsida of Australia, polypodiopsida New Zealand, and neighbouring regions.

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