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Psilotum (Psilotaceae-Ophioglossales): a taxonomic assessment based on morpho-anatomical studies of the species from the Neotropics
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Psilotum (Psilotaceae-Ophioglossales): a taxonomic assessment based on morpho-anatomical studies of the species from the Neotropics
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Psilotum (Psilotaceae-Ophioglossales): a taxonomic assessment based on morpho-anatomical studies of the species from the Neotropics
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Journal Article
Psilotum (Psilotaceae-Ophioglossales): a taxonomic assessment based on morpho-anatomical studies of the species from the Neotropics
2024
Overview
The recent discovery of
Psilotum
×
intermedium
in Mexico prompted us to reassess the nomenclature of this genus, which has global implications. From an extensive review of nomenclatural types and herbarium specimens, field collections, and a morpho-anatomical analysis,
P. nudum
and
P. flaccidum
are treated as accepted species, while
P.
×
complanatum
is treated as an interspecific hybrid between them. With this clarification, we specify their main synonymies and designate seven lectotypes (for
Bernhardia schiedeana
,
Psilotum complanatum
var.
latissimum
,
P. complanatum
var
. mexicanum
,
P. floridanum
,
P. neocaledonicum
,
P. triquetrum
,
P. triquetrum
var.
gracile
) and we select an epitype to give taxonomic support to the hybrid. We provide descriptions, diagnostic comments, and a key for identification of the accepted taxa, and also update the geographical ranges of these three taxa, mainly in Neotropics.
