| Noun | 1. | class Filicinae - ferns class - (biology) a taxonomic group containing one or more orders division Pteridophyta, Pteridophyta - containing all the vascular plants that do not bear seeds: ferns, horsetails, club mosses, and whisk ferns; in some classifications considered a subdivision of Tracheophyta fern - any of numerous flowerless and seedless vascular plants having true roots from a rhizome and fronds that uncurl upward; reproduce by spores family Schizaeaceae, Schizaeaceae - small family of mainly tropical ferns family Marsileaceae, Marsileaceae - clover ferns family Salviniaceae, Salviniaceae - water ferns Ophioglossales, order Ophioglossales - coextensive with the family Ophioglossaceae Adiantaceae, family Adiantaceae - used in some classification systems for some genera of the family Polypodiaceae (or Pteridaceae) Cyatheaceae, family Cyatheaceae - tropical tree ferns Davalliaceae, family Davalliaceae - one of a number of families into which Polypodiaceae has been subdivided in some classification systems Dennstaedtiaceae, family Dennstaedtiaceae - one of a number of families into which Polypodiaceae has been subdivided in some classification systems Athyriaceae, Dryopteridaceae, family Athyriaceae, family Dryopteridaceae - alternative names for one of a number of families into which the family Polypodiaceae has been subdivided in some classification systems family Lomariopsidaceae, Lomariopsidaceae - small family of usually scandent ferns family Lophosoriaceae, Lophosoriaceae - very small family of tree ferns family Loxomataceae, Loxomataceae - very small family of New Zealand ferns Marattiales, order Marattiales - lower ferns coextensive with the family Marattiaceae Cryptogrammataceae, family Cryptogrammataceae - one of a number of families into which the family Polypodiaceae has been subdivided in some classification systems family Thelypteridaceae, Thelypteridaceae - genera Thelypteris, Phegopteris, and others |