The Pteridopsida is a class of plants in the Division Pteridophyta that includes the "modern" ferns. The Pteridopsida is sub-divided into four subclasses to reflect likely cladistics. These classes (and their included orders) are:
PteridopsidaFern, or pteridophyte, is any one of a group of some twenty thousand species of plants classified in the Division Pteridophyta, formerly known by some as ''Filicophyta''.
A fern is defined as a vascular_plant that lacks seeds, and that reproduces by shedding spores to initiate an alternation_of_generations.
Pteridopsida The last group includes most plants familiarly known as ferns.
PteridopsidaPteridopsida "Fern", or "pteridophyte", is any one of a group of some twenty thousand species of plants classified in the "Division Pteridophyta", formerly known by some as "Filicophyta".
A fern is defined as a vascular plantvascular plant that lacks seed seeds, and that reproduces by shedding sporespores to initiate an alternation of generations alternation of generations.
PteridopsidaPteridopsida The last group includes most plants familiarly known as ferns.
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