Pteridales

Synonym: Dennstaedtiales; Polypodiales, starting families.
Clades: Pterididae; Polypodopsida; Pteridophyta; Plants.
Members: 53 genera; 1211 species.
Region: cosmopolitan.
Habitat: swamps, mangroves, high elevations, rain forests to deserts. TaxonomyThe PPG1 classification this order was reduced the family Pteridaceae under the Smith classification of 2006. The Pteridophyte Phylogeny Group classification of 2016 (PPG I) places Pteridaceae, Dennstaedtiaceae and Lindsaeaceae with a few smaller families in the leptosporangiate ferns.
Related is a monophyletic clade around Lindsaeaceae with the related monogeneric families Saccolomataceae, Cystodiaceaea and Lonchitidaceae.Plant theoryIn the Plant theory Pteridales is made the only Order in Pterididae. Lindsaeaceae is extended with families Saccolomataceae, Cystodiaceaea and Lonchitidaceae, and is placed in Subphase 1 of Pteridales.
Dennstaedtiaceae is placed in Subphase 7.
Pteridaceae is split in five subfamilies and placed in Subphase 2 to Subphase 5.BotanyFern.
Chromosome number: X=30.
Leaves: edge of the lamina reflexed over.
Sori: in linear strips under the edge of the leaf tissue.
Sporangia: formed along veins; lack of true indusium.Subphases FamiliesPhase Remedy code Family
1. 3-442.11.00 Lindsaeaceae
2. 3-442.00.00 Cryptogrammoideae
3. 3-443.00.00 Cheilanthoideae
4. 3-444.00.00 Adiantoideae
5. 3-441.00.00 Vittarioideae
6. 3-442.00.00 Pteridoideae
7. 3-443.00.00 DennstaedtiaceaeFamiliesSub Family Family Genera Species
1 Lindsaeaceae 10
2 Cryptogrammoideae Pteridaceae 3 23
3 Cheilanthoideae Pteridaceae 28
4 Adiantoideae Pteridaceae 1 250
5 Vittarioideae Pteridaceae 15
6 Pteridoideae Pteridaceae 14
7 Dennstaedtiaceae 11 LiteratureSchuettpelz, Eric; A molecular phylogeny of the fern family Pteridaceae: Assessing overall relationships and the affinities of previously unsampled genera; Molecular Phylogenetics and Evolution 44, 1172–1185; 2007.
Zhang, Liang & others; A global plastid phylogeny of the brake fern genus Pteris (Pteridaceae) and related genera in the Pteridoideae; Wiley Blackwee; 2015.