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Below are lists of extant fern families and subfamilies using the classification scheme proposed by the Pteridophyte Phylogeny Group in 2016 (PPG I). [1] The scheme is based on molecular phylogenetic studies, and also draws on earlier classifications, [1] particularly those by Smith et al. (2006), [2] Chase and Reveal (2009), [3] and Christenhusz et al. (2011). [4]
Matoniaceae is one of the three families of ferns in the Gleicheniales order of the Polypodiopsida class. [1] [2] Fossil records reveal that Matoniaceae ferns were abundant during the Mesozoic era (about 250-million to 66-million years ago), during which they lived on every continent, including Antarctica, with eight genera and 26 species, with the oldest known specimens being from the Middle ...
Osmundaceae (royal fern family) is a family of ferns containing four to six extant genera and 18–25 known species. It is the only living family of the order Osmundales in the class Polypodiopsida or in some classifications the only order in the class Osmundopsida.
PPG I uses 18 lycopod and 319 fern genera. [1] The earlier system put forward by Smith et al. (2006) had suggested a range of 274 to 312 genera for ferns alone. [2] By contrast, the system of Christenhusz and Chase (2014) used 5 lycopod and about 212 fern genera. [3] The number of fern genera was further reduced to 207 in a subsequent ...
Polypodiales are unique in bearing sporangia with a vertical annulus interrupted by the stalk and stomium. [2] These sporangial characters were used by Johann Jakob Bernhardi to define a group of ferns he called the "Cathetogyratae"; [3] the Pteridophyte Phylogeny Group has suggested reviving this name as the informal term cathetogyrates, to replace the ambiguously circumscribed term "polypods ...
Marattiaceae is the only family of extant (living) ferns in the order Marattiales. [1] [2] In the Pteridophyte Phylogeny Group classification of 2016 (PPG I), Marattiales is the only order in the subclass Marattiidae.
The Hymenophyllaceae, the filmy ferns and bristle ferns, are a family of two to nine genera (depending on classification system) and about 650 known species [1] of ferns, with a subcosmopolitan distribution, but generally restricted to very damp places or to locations where they are wetted by spray from waterfalls or springs.
Equisetidae is one of the four subclasses of Polypodiopsida (ferns), a group of vascular plants with a fossil record going back to the Devonian. They are commonly known as horsetails . [ 2 ] They typically grow in wet areas, with whorls of needle-like branches radiating at regular intervals from a single vertical stem.