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A community‐derived classification for extant lycophytes and ferns
TLDR
A modern, comprehensive classification for lycophytes and ferns, down to the genus level, utilizing a community‐based approach, that uses monophyly as the primary criterion for the recognition of taxa, but also aims to preserve existing taxa and circumscriptions that are both widely accepted and consistent with the understanding of pteridophyte phylogeny.
Phylogenetic Relationships among the Genera of Taxodiaceae and Cupressaceae: Evidence from rbcL Sequences
TLDR
Phylogenetic analyses produced four most parsimonious trees that differ only in the positions of three genera and the degree of resolution of a trichotomy within Cupressaceae s.l. str.
Phylogeny and evolution of grammitid ferns (Grammitidaceae): a case of rampant morphological homoplasy
TLDR
The authors' data support a New World origin of Grammitidaceae, with Old World taxa generally being more evolutionarily derived and several clades are either primarily Neotropical or primarily Paleotropical but also have a few members distributed in the opposite hemisphere.
Geographic distributions of homosporous ferns: does dispersal obscure evidence of vicariance?
TLDR
The criteria for an effective research programme that can address the issue of whether dispersal is so extensive in ferns that vicariance is no longer detectable in most cases is outlined.
Systematic inferences from spore and stomate size in the ferns
TLDR
A considerable body of evidence has been assembled supporting the contention that spore size is related to ploidy level in the ferns and an exhaustive analysis of spore features of northeastern North American Isoetes provided new insight into spore-size variability.
Morphological innovation, ecological opportunity, and the radiation of a major vascular epiphyte lineage
TLDR
It is found that diversification rates in the Polypodiaceae are positively correlated with changes in elevation, and Repeated successful exploration of novel habitat types, rather than morphological innovation, appears to be the primary driver of diversification in this group.
Genetic evidence for allopolyploidy in the neotropical fern hemionitis pinnatifida (Adiantaceae) and the reconstruction of an ancestral genome
TLDR
Genetic evidence from enzyme electrophoresis and restriction site analyses of cpDNA was employed to explore the origin of the tetraploid Hemionitis pinnatifida and demonstrated that the missing ancestor was genetically more similar to H. palmata than either of these species is to the other diploid species surveyed.
Serpocaulon (Polypodiaceae), a new genus segregated from Polypodium
TLDR
The neotropical fern genus Serpocaulon (Polypodiaceae), segregated from Polypodium, is described and new combinations for the forty known species are made, and there appears to be no convenient infrageneric division of the species within SerpOCaulon.
Clonal Diversity in Alpine Populations of Polygonum viviparum (Polygonaceae)
TLDR
Allozyme analysis of three alpine populations of Polygonum viviparum revealed surprising levels of genetic diversity, and the number of clones and measures of diversity and evenness were much lower in the fell-field population than in wet meadow and dry meadow populations.
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