Tricholepidium

Tricholepidium is a genus of ferns in the family Polypodiaceae, subfamily Microsoroideae, according to the Pteridophyte Phylogeny Group classification of 2016 (PPG I).[2]

Tricholepidium
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Class: Polypodiopsida
Order: Polypodiales
Suborder: Polypodiineae
Family: Polypodiaceae
Subfamily: Microsoroideae
Genus: Tricholepidium
Ching[1]
Species

See text.

Taxonomy

Tricholepidium was first described by Ren-Chang Ching in 1978.[1] A molecular phylogenetic study in 2019 suggested that Tricholepidium was one of a group of closely related genera in the subfamily Microsoroideae, a group the authors termed "Lepisorus sensu lato". Its species were embedded in a clade in which none of the genera appeared to be monophyletic:[3]

Lepisorus s.l.
 
 

Lemmaphyllum

 
 

Lepidomicrosorium + Neocheiropteris + Neolepisorus + Tricholepidium

 
 
 
 

Lepisorus s.s.

 
 

Paragramma (as Lepisorus longifolius)

 
 
 

Species

The Pteridophyte Phylogeny Group classification of 2016 (PPG I) separates the monotypic genus Lepidomicrosorium from Tricholepidium.[2] As of February 2020, neither the Checklist of Ferns and Lycophytes of the World nor Plants of the World Online accepted the separation, and so placed Lepidomicrosorium subhastatum in Tricholepidium (as Tricholepidium buergerianum) along with four other species:[1][4]

  • Tricholepidium normale (Don) Ching
  • Tricholepidium subhemionitideum (Christ) Fraser-Jenk.
  • Tricholepidium superficiale (Blume) Fraser-Jenk.
  • Tricholepidium venosum Ching

References
  1. Hassler, Michael & Schmitt, Bernd (January 2020), "Tricholepidium", Checklist of Ferns and Lycophytes of the World, Version 8.20, retrieved 2020-02-10
  2. PPG I (2016), "A community-derived classification for extant lycophytes and ferns", Journal of Systematics and Evolution, 54 (6): 563–603, doi:10.1111/jse.12229, S2CID 39980610
  3. Testo, Weston L.; Field, Ashley R.; Sessa, Emily B. & Sundue, Michael (2019), "Phylogenetic and Morphological Analyses Support the Resurrection of Dendroconche and the Recognition of Two New Genera in Polypodiaceae Subfamily Microsoroideae" (PDF), Systematic Botany, 44 (4): 737–752, doi:10.1600/036364419X15650157948607, S2CID 208176686, retrieved 2020-02-11
  4. "Tricholepidium Ching", Plants of the World Online, Royal Botanic Gardens, Kew, retrieved 2020-02-10


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