Pteridaceae

Pteridaceae is a family of ferns in the order Polypodiales,[2] including some 1150 known species in ca 45 genera[3] (depending on taxonomic opinions), divided over five subfamilies.[4] The family includes four groups of genera that are sometimes recognized as separate families: the adiantoid, cheilanthoid, pteridoid, and hemionitidoid ferns. Relationships among these groups remain unclear, and although some recent genetic analyses of the Pteridales suggest that neither the family Pteridaceae nor the major groups within it are all monophyletic, as yet these analyses are insufficiently comprehensive and robust to provide good support for a revision of the order at the family level.

Pteridaceae
Pityrogramma austroamericana
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Class: Polypodiopsida
Order: Polypodiales
Suborder: Pteridineae
J.Prado & Schuettp.
Family: Pteridaceae
E.D.M.Kirchn.[1]
Subfamilies
Synonyms
  • Acrostichaceae A.B.Frank
  • Actiniopteridaceae Pic. Serm.
  • Adiantaceae Newman nom. cons.
  • Anopteraceae Doweld
  • Antrophyaceae Ching
  • Ceratopteridaceae Underw.
  • Cheilanthaceae M.P.Nayar
  • Cryptogrammaceae Pic.Serm.
  • Hemionitidaceae Pic.Serm.
  • Negripteridaceae Pic.Serm.
  • Parkeriaceae Hook.
  • Platyzomataceae Nakai
  • Sinopteridaceae Koidz.
  • Taenitidaceae Pic.Serm.
  • Vittariaceae Ching[1]
Adiantum lunulatum

Description

Members of Pteridaceae have creeping or erect rhizomes. The leaves are almost always compound and have linear sori that are typically on the margins of the leaves and lack a true indusium, typically being protected by a false indusium formed from the reflexed margin of the leaf.

Taxonomy

Smith et al. (2006) carried out the first higher-level pteridophyte classification published in the molecular phylogenetic era.[5] Smith referred to the ferns as monilophytes, dividing them into four groups. The vast majority of ferns were placed in the Polypodiopsida.

In 2016, the Pteridophyte Phylogeny Group divided order Polypodiales into six suborders. Pteridaceae is the sole family in suborder Pteridiineae, with 52 genera. The suborder has the same circumscription as Smith et al. used for the family. The phylogenetic relationship between these six suborders is shown in this cladogram:[2]

Polypodiales
 
 

Saccolomatineae

 
 

Lindsaeineae

 
 
 
 

Pteridiineae

 
 
 

Dennstaedtiineae

 
 
 

Aspleniineae

 
 

Polypodiineae

 
 
 
 
 

Traditional groups
Curtis's botanical magazine, Argyrochosma nivea var. tenera

As traditionally defined, the groups within Pteridaceae are as follows:

  • Adiantoid ferns (tribe Adianteae Gaudich. 1829[6]); epipetric, terrestrial or epiphytic in moist habitats, rachis often dichotomously branching; sori relatively small and discrete with sporangia born on the false indusium rather than the leaf blade proper; only one genus:
  • Cheilanthoid ferns; primarily epipetric in semiarid habitats; leaves mostly with well-developed scales or trichomes, often bipinnate or otherwise highly compound; sporangia mostly born in marginal sori with false indusia that are +/- continuous around the leaf margins; several genera, including:
  • Pteridoid ferns (tribe Pterideae J. Sm 1841[9]); terrestrial and epipetric in moist habitats; leaves mostly without prominent scales or trichomes, most often pinnate but sometimes more compound; sporangia born in marginal sori with false indusia that are +/- continuous around the leaf margins; several genera, including:
  • Parkerioid ferns (tribe Parkerieae Brongn. 1843[10]); aquatic in swamps and/or mangroves, including:
  • Hemionitidoid ferns; terrestrial, epipetric or epiphytic in moist or semiarid habitats; leaves simple, pinnate, or more compound; sporangia born in linear non-marginal, exindusiate sori or sometimes in marginal sori; several genera, including:
  • Vittarioid ferns (tribe Vittarieae C. Presl 1836[11]); primarily epiphytic in tropical regions and all have simple leaves with sori that follow the veins and lack true indusia:

Subfamilies

Based on phylogenetic research, Christenhusz et al. (2011) divided the Pteridaceae genera into five subfamilies.[12] These roughly correspond with the groups listed above, with the main difference being that adiantoid and vittarioid ferns are combined under the Vittarioideae subfamily name. The approach was followed by the Pteridophyte Phylogeny Group classification of 2016 (PPG I).[2]

(=) Cryptogrammaceae Pic. Serm.
Genera: Coniogramme, Cryptogramma, Llavea
(=) Ceratopteridoideae
(=) Parkeriaceae Hook.
(=) Ceratopteridaceae Underw.
Genera: Acrostichum, Ceratopteris
Genera: Actiniopteris, Anogramma, Austrogramme, Cerosora, Cosentinia, Gastoniella, Jamesonia (incl. Eriosorus and Nephopteris), Onychium, Pityrogramma, Pteris (incl. Neurocallis & Platyzoma), Pterozonium, Syngramma, Taenitis, Tryonia
(=) Cheilanthaceae B.K. Nayar
Genera: Adiantopsis, Aleuritopteris, Allosorus, Argyrochosma, Aspidotis, Astrolepis, Bommeria, Calciphilopteris, Cheilanthes, Cheiloplecton, Doryopteris, Gaga, Hemionitis, Lytoneuron, Mildella, Myriopteris, Notholaena, Ormopteris, Paragymnopteris, Parahemionitis, Pellaea, Pentagramma, Trachypteris
(=) Adiantoideae (C.Presl) R.M.Tryon
(=) Adiantaceae Newman
Genera: Adiantum, Ananthacorus, Antrophyopsis, Antrophyum, Haplopteris, Hecistopteris, Polytaenium, Radiovittaria, Rheopteris, Scoliosorus, Vaginularia, Vittaria

Phylogenic relationships

The following phylogram, showing the relationships between the subfamilies listed above, is based on Schuettpelz & Pryer (2008).[13][14]

Pteridaceae
 

Cryptogrammoideae

 
 
 
 

Parkerioideae

 
 

Pteridoideae

 
 
 
 

Cheilanthoideae

 
 

Vittarioideae

 
 
 
 

Distribution and habitat

Mostly terrestrial or epipetric (growing on rock).

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References
  1. "Family: Pteridaceae E. D. M. Kirchn". Germplasm Resources Information Network. United States Department of Agriculture. 2001-08-14. Archived from the original on 2012-05-27. Retrieved 2011-11-04.
  2. Pteridophyte Phylogeny Group 2016.
  3. Christenhusz, M. J. M. & Byng, J. W. (2016). "The number of known plants species in the world and its annual increase". Phytotaxa. 261 (3): 201–217. doi:10.11646/phytotaxa.261.3.1.
  4. Christenhusz, M. J. M. & Chase, M. W. (2014). "Trends and concepts in fern classification". Annals of Botany. 113 (4): 571–594. doi:10.1093/aob/mct299. PMC 3936591. PMID 24532607.
  5. Smith et al. 2006.
  6. Adianteae Tropicos.org. Missouri Botanical Garden. 14 Jan 2012
  7. "Pteridaceae". Integrated Taxonomic Information System. Retrieved 2011-11-04.
  8. "GRIN Genera of Pteridaceae". Germplasm Resources Information Network. United States Department of Agriculture. Archived from the original on 2015-09-24. Retrieved 2011-11-04.
  9. Pterideae Tropicos.org. Missouri Botanical Garden. 14 Jan 2012
  10. Parkerieae Tropicos.org. Missouri Botanical Garden. 14 Jan 2012
  11. Vittarieae Tropicos.org. Missouri Botanical Garden. 14 Jan 2012
  12. Christenhusz, Maarten J. M.; Zhang, Xian-Chun; Schneider, Harald (18 February 2011). "A linear sequence of extant families and genera of lycophytes and ferns" (PDF). Phytotaxa. 19: 7–54. doi:10.11646/phytotaxa.19.1.2. ISSN 1179-3163.
  13. Schuettpelz & Pryer (2008) "Fern phylogeny" in Biology and Evolution of Ferns and Lycophytes, ed. Tom A. Ranker and Christopher H. Haufler. Cambridge University Press 2008
  14. Schuettpelz et al. (2007) Archived 2008-08-20 at the Wayback Machine Eric Schuettpelz, Harald Schneider, Layne Huiet, Michael D. Windham, Kathleen M. Pryer: "A molecular phylogeny of the fern family Pteridaceae: Assessing overall relationships and the affinities of previously unsampled genera." Molecular Phylogenetics and Evolution 44 (2007) 1172–1185

Bibliography

Data related to Pteridaceae at Wikispecies

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