Gleicheniales

Gleicheniales Temporal range: Permian–Recent PreꞒ Ꞓ O S D C P T J K Pg N
Dipteris conjugata of the Dipteridaceae
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Division:	Polypodiophyta
Class:	Polypodiopsida
Subclass:	Polypodiidae
Order:	Gleicheniales Schimp.
Families
Dipteridaceae Gleicheniaceae Matoniaceae
Synonyms
Gleicheniatae Gleicheniopsida (but see text)

Gleicheniales is an order of ferns in the subclass Polypodiidae (the leptosporangiate ferns). The Gleicheniales have records potentially as early as the Carboniferous, but the oldest unambiguous records date to the Permian.