X
MOV File
Online Collections

fern


Details
Term Type

Art & Architecture Thesaurus

Preferred Term

fern

Details

A large group of around 20,000 species of flowerless, seedless vascular plants having true roots from a rhizome and fronds that uncurl upward, reproducing by spores. The ferns are an ancient lineage of plants, dating back to at least the Devonian; during the Palaeozoic, tree-ferns grew several meters tall. The ferns include three living groups (Marattiales, Ophioglossales, and leptosporangiate ferns) and two or more extinct groups. An additional group, the Psilotales, is tentatively included in the ferns, although the group is vastly different from living ferns and its relationships are uncertain. The ferns group is also referred to as Polypodiophyta or Polypodiopsida when classified as a subdivision of tracheophyta (vascular plants).

Variations

Pteridophyta

ferns

Division Pterophyta

Division Pteridophyta

Polypodiophyta

Polypodiopsida

Pteridopsida

helechos

helecho

Division Filicophyta

Broader Term

Plantae

Related Events
Related People
Related Literature
Related Terms
Related Artworks
Media
IMLS logoNEA logoNEH logo

The Portland Art Museum’s Online Collections site is brought to you thanks to support provided by the State of Oregon through its second Culture, History, Arts, Movies, and Preservation funding program and generous awards from the Institute of Museum and Library Services, the National Endowment for the Humanities, and the National Endowment for the Arts.

This Portland Art Museum's Online Collections site is powered by MWeb.