A plant family of the order Polypodiales, class Filicopsida, division Pteridophyta (FERNS).

Seedless nonflowering plants of the class Filicinae. They reproduce by spores that appear as dots on the underside of feathery fronds. In earlier classifications the Pteridophyta included the club mosses, horsetails, ferns, and various fossil groups. In more recent classifications, pteridophytes and spermatophytes (seed-bearing plants) are classified in the Subkingdom Tracheobionta (also known as Tracheophyta).

A transfer RNA which is specific for carrying glycine to sites on the ribosomes in preparation for protein synthesis.

The reproductive cells of plants.