Division: Pteridophyta (Filicophyta)
Class: Pteridopsida (Filicopsida)
The order Athyriales is a diverse one, including many types of advanced ferns. They are global in distribution, with a large proportion of temperate-zone representatives. the ancestral chromosome count for the order was apparently n=40, but we see ma ny variations on this. The genus Cystopteris has n=42, while various other families include members with various levels of reduced chromosome counts.
Families of Athyriales:
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This page was last revised on 11-21-1997.