Widespread co-occurrence of multiple ploidy levels in fragile ferns (Cystopteris fragilis complex; Cystopteridaceae) probably stems from similar ecology of cytotypes, their efficient dispersal and inter-ploidy hybridization.
- Environmental Science, BiologyAnnals of botany
High ploidy-level diversity and widespread cytotype coexistence in the C. fragilis complex match the well-documented patterns in some angiosperms, which could be facilitated by the perennial life-form of the species, its reproductive modes and efficient wind dispersal of spores.
THE HARDY FERN FOUNDATION
A new species of Adiantum is described from California, endemic to northern California and currently known only from Shasta County, which is evergreen and is sometimes, but not always, associated with limestone.
Identifying a Cryptic Adiantum Population through DNA Barcoding
- BiologyAmerican Fern Journal
Populations of Adiantum growing on serpentine barrens in Pennsylvania and Maryland have been identified as A. aleuticum (Rupr.) C.Paris and A. viridimontanum C.A.Paris, both of which are known from serpentine in New England and Canada.
Adiantum shastense, a new species of maidenhair fern from California
This species is endemic to northern California and is currently known only from Shasta County and it is described after first being collected over a century ago and distinguish it from Adiantum jordanii andAdiantum capillus-veneris.
First insights into the evolutionary history of the Davallia repens complex
It is hypothesize that there were at least two ancestral lineages distributed in the Malesian region and some polyploid genotypes dispersed outwards to shape the extant distribution through hybridization,polyploidization and apogamy.
Biogeographic disjunction between eastern Asia and North America in the Adiantum pedatum complex (Pteridaceae).
- BiologyAmerican journal of botany
The eastern Asian-North American disjunction in the complex is inferred to be the result of two intercontinental migrations, one from eastern Asia into North America in the late Tertiary and the other from North America back to eastern Asia in the Pleistocene.
SHOWING 1-10 OF 22 REFERENCES
Ferns diversified in the shadow of angiosperms
- Environmental Science, GeographyNature
It is shown that polypod ferns (> 80% of living fern species) diversified in the Cretaceous, after angiosperms, suggesting perhaps an ecological opportunistic response to the diversification of angios perms, as angiosPerms came to dominate terrestrial ecosystems.
Dispersal‐Vicariance Analyses of Intercontinental Disjuncts: Historical Biogeographical Implications for Angiosperms in the Northern Hemisphere
- Environmental ScienceInternational Journal of Plant Sciences
Ten North Temperate taxa representing diverse angiosperm lineages were analyzed for biogeographic histories using the dispersal‐vicariance analysis method to gain insights into the origin and evolution of disjunct distributions in the Northern Hemisphere and suggest pseudocongruence among lineages in phylogenetic relationships and distributional patterns.
The Use of Geological and Paleontological Evidence in Evaluating Plant Phylogeographic Hypotheses in the Northern Hemisphere Tertiary
- BiologyInternational Journal of Plant Sciences
The history of the climatic and geographic features of the Tertiary of the Northern Hemisphere agrees with many phylogenetically based phylogeographic hypotheses of living angiosperm genera but indicates that some hypotheses require reanalysis.
Evolution of Eastern Asian and Eastern North American Disjunct Distributions in Flowering Plants
- Environmental Science
Phylogenetic, molecular, geologic, and fossil data all support the hypothesis that the eastern Asian and eastern North American disjunct distributions are relicts of the maximum development of temperate forests in the northern hemisphere.
Phylogeny of the Vittariaceae: Convergent Simplification Leads to a Polyphyletic Vittaria
A 1380 bp fragment of the chloroplast-encoded rbcL gene was amplified and sequenced from species repre- senting the genera and subgenera of the Vittariaceae, resulting in two most parsimonious trees which differ only in the position of the monotypic Ananthacorus.
Biogeography of ferns: dispersal and vicariance
- Environmental Science
The eastern Asian-eastern North American disjunct distribution pattern in some recently revised fern taxa may have arisen by a layering of many climatic and geological events.
Incipient polyploid Speciation in the maidenhair fern (Adiantum pedatum ; Adiantaceae)?
The discovery of diploid sporophytes producing unreduced spores provided the opportunity to characterize the first step of one possible route to polyploid formation, and continued observations of the natural population may provide insights into the earliest stages of natural polyploids formation.
A Biosystematic Investigation of the Adiantum pedatum Complex in Eastern North America
Botanists disagree about the relationship of the serpentine and the woodland members of the Adiantum pedatum complex in eastern North America. Whereas some recognize the two taxa as subspecies,…