Didymochlaena

Didymochlaena is a genus of ferns. In the Pteridophyte Phylogeny Group classification of 2016 (PPG I), it is the only genus in the family Didymochlaenaceae.^[2] Alternatively, the family may be placed in a very broadly defined family Polypodiaceae sensu lato as the subfamily Didymochlaenoideae.^[3]

Didymochlaena
Didymochlaena truncatula
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Division:	Polypodiophyta
Class:	Polypodiopsida
Order:	Polypodiales
Suborder:	Polypodiineae
Family:	Didymochlaenaceae Ching ex Li Bing Zhang & Liang Zhang
Genus:	Didymochlaena Desv.
Type species
Didymochlaena sinuosa Desv.
Species
See text
Synonyms[1]
Hippodium Gaudich. Hysterocarpus Langsd. ex Fée Monochlaena Gaudich. non de Cassini Tegularia Reinw.

Description

Members of this genus are terrestrial, evergreen plants growing 0.8–3 m (2 ft 7 in – 9 ft 10 in) tall. The fronds arise from upright, scaly rhizomes. The leaves are bipinnate and imparipinnate.^[4]

Phylogeny

This genus includes the following species:^[1]

External phylogeny from PPG I 2016 [2]	Internal phylogeny from Fern Tree of Life[5][6]
Polypodiineae Didymochlaenaceae Hypodematiaceae Dryopteridaceae Nephrolepidaceae Lomariopsidaceae Tectariaceae Oleandraceae Davalliaceae Polypodiaceae (eupolypods I)	Didymochlaena D. truncatula (Sw.) J.Sm. section D. mesoamericana Li Bing Zhang & H.Shang D. alpina Li Bing Zhang & H.Shang D. amazonica Li Bing Zhang & H.Shang Amazonicae section D. sinuosa Desv. D. philippensis Li Bing Zhang & H.Shang D. punctata Li Bing Zhang & H.Shang D. oceanica Li Bing Zhang & H.Shang D. fijiensis Li Bing Zhang & H.Shang D. solomonensis Li Bing Zhang & H.Shang Didymochlaena section D. cameroonensis Li Bing Zhang & H.Shang D. dimidiata Kunze D. spinulosa (Brause) Li Bing Zhang & H.Shang D. attenuata (Bonap.) Li Bing Zhang & H.Shang D. madagascariensis Li Bing Zhang & H.Shang D. deltoidea Li Bing Zhang & H.Shang D. bipinnatipartita (Bonap.) Li Bing Zhang & H.Shang D. microphylla (Bonap.) C.Chr. Spinulosae

Other species include:^{[citation needed]}

• D. comorensis Li Bing Zhang & H.Shang
• D. cubensis Li Bing Zhang & H.Shang
• D. pulcherrima Herter
• D. squamata (Willd.) Desv.