''Gymnocarpium'' is a small genus of ferns, called oak ferns. It was once placed with various other groups, including the
dryopteroid ferns and the
athyrioid ferns.
Cladistic
Cladistics (; ) is an approach to biological classification in which organisms are categorized in groups ("clades") based on hypotheses of most recent common ancestry. The evidence for hypothesized relationships is typically shared derived char ...
analysis has demonstrated that ''Gymnocarpium'' and ''
Cystopteris'' form a natural but relatively primitive clade that is basal to the
asplenioid,
thelypterioid, and athyrioid ferns comprehensively.
''Gymnocarpium''
sori are small, round and naked. These ferns generally have a slender, creeping rhizome under the surface of the ground, and fairly thin-textured fronds.
''Gymnocarpium'' species
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Gymnocarpium appalachianum
''Gymnocarpium'' is a small genus of ferns, called oak ferns. It was once placed with various other groups, including the dryopteroid ferns and the athyrioid ferns. Cladistic
Cladistics (; ) is an approach to biological classification in w ...
'' – Appalachian oak fern
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Gymnocarpium brittonianum
''Gymnocarpium'' is a small genus of ferns, called oak ferns. It was once placed with various other groups, including the dryopteroid ferns and the athyrioid ferns. Cladistic analysis has demonstrated that ''Gymnocarpium'' and '' Cystopteris'' ...
''
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Gymnocarpium dryopteris
''Gymnocarpium dryopteris'', the western oakfern, common oak fern , oak fern, or northern oak fern, is a deciduous fern of the family Cystopteridaceae. It is widespread across much of North America and Eurasia. It has been found in Canada, the ...
'' – (northern) oak fern
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Gymnocarpium fedtschenkoanum''
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Gymnocarpium disjunctum''
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Gymnocarpium jessoense'' – western or Nahanni oak fern
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Gymnocarpium oyamense''
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Gymnocarpium remotepinnatum''
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Gymnocarpium robertianum
''Gymnocarpium robertianum'', the limestone fern or scented oakfern, is a fern of the family Cystopteridaceae.
Description
''Gymnocarpium robertianum'' has small (10–50 cm), deltate, two- to three-pinnate fronds. Fronds arise from creep ...
'' – limestone oak fern
External links
''Gymnocarpium'' world species list
Fern genera
Taxa named by Edward Newman
{{Polypodiales-stub