Ophioglossaceae

Ophioglossaceae
Ophioglossum vulgatum
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Division:	Polypodiophyta
Class:	Polypodiopsida
Subclass:	Ophioglossidae
Order:	Ophioglossales Link[1]
Family:	Ophioglossaceae Martinov[1]
Subfamilies and genera
See text.
Synonyms
Botrychiaceae Horaninow 1847 Helminthostachyaceae Ching 1941

Ophioglossaceae, the adder's-tongue family, is a small family of ferns. In the Pteridophyte Phylogeny Group classification of 2016 (PPG I), it is the only family in the order Ophioglossales, which together with the Psilotales is placed in the subclass Ophioglossidae.^[1] The Ophioglossidae are one of the groups traditionally known as eusporangiate ferns. Members of the family differ from other ferns in a number of ways. Many have only a single fleshy leaf at a time. Their gametophytes are subterranean and rely on fungi for energy.