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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 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 *'' Gymnocarpium appalachianum'' – Appalachian oak fern *''Gymnocarpium brittonianum'' *''Gymnocarpium dryopteris'' – (northern) oak fern *''Gymnocarpium fedtschenkoanum'' *''Gymnocarpium disjunctum'' *''Gymnocarpium jessoense'' – western or Nahanni oak fern *''Gymnocarpium oyamense'' *''Gymnocarpium remotepinnatum'' *''Gymnocarpium robertianum ''Gymnocarpium robertianum'', the limestone fern or scented o ...
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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 United States, Greenland, China, Japan, Korea, Russia, and most of Europe. Description ''Gymnocarpium dryopteris'' has small, delicate fronds up to 40 cm (16 inches) long, with ternately-compound pinnae (leaves). Fronds occur singly. On the underside of matured pinnae the naked sori can be found (the Latin generic name ''gymnocarpium'' means "with naked fruit"). The species grows in coniferous woodlands and on shale talus slopes. ''Gymnocarpium dryopteris'', a forest understory plant, is not found in association with '' Quercus'' (oak). In cultivation in the UK this plant and the cultivar "Plumosum" have gained the Royal Horticultural Society’s Award of Garden Merit The Award of Garden Merit (AGM) is a long-establishe ...
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Gymnocarpium
''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'' 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 *''Gymnocarpium appalachianum'' – Appalachian oak fern *''Gymnocarpium brittonianum'' *''Gymnocarpium dryopteris'' – (northern) oak fern *''Gymnocarpium fedtschenkoanum'' *''Gymnocarpium disjunctum'' *''Gymnocarpium jessoense'' – western or Nahanni oak fern *''Gymnocarpium oyamense'' *''Gymnocarpium remotepinnatum'' *''Gymnocarpium robertianum ''Gymnocarpium robertianum'', the limestone fern or scented oa ...
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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 creeping rhizomes and have long, delicate rachis. The sori are borne in round clumps on the underside of the blade and lack an indusium. This species differs from the closely related ''G. dryopteris'' in having a densely glandular rachis as well as a more sparsely glandular underside to the blade. ''Gymnocarpium robertianum'' is thought to hybridise with ''G. appalachianum'' giving rise to ''Gymnocarpium'' × ''heterosporum'' W. H. Wagner. This hybrid was only known from Pennsylvania where it has now been eradicated. The hybrid between ''G. robertianum'' and ''G. dryopteris'' is called ''Gymnocarpium'' × ''achriosporum'' Sarvela. This taxon is known from Sweden and Quebec.
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Gymnocarpium Remotepinnatum
''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'' 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 *'' Gymnocarpium appalachianum'' – Appalachian oak fern *'' Gymnocarpium brittonianum'' *''Gymnocarpium dryopteris'' – (northern) oak fern *'' Gymnocarpium fedtschenkoanum'' *'' Gymnocarpium disjunctum'' *'' Gymnocarpium jessoense'' – western or Nahanni oak fern *'' Gymnocarpium oyamense'' *'' Gymnocarpium remotepinnatum'' *''Gymnocarpium robertianum ''Gymnocarpium robertianum'', the limestone fern or sc ...
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Gymnocarpium Oyamense
''Gymnocarpium oyamense'' is a species of fern in the oak-fern genus ''Gymnocarpium'', family Aspleniaceae. It is found from Nepal to China and Japan and on to New Guinea. It has gained the Royal Horticultural Society's Award of Garden Merit The Award of Garden Merit (AGM) is a long-established annual award for plants by the British Royal Horticultural Society (RHS). It is based on assessment of the plants' performance under UK growing conditions. History The Award of Garden Merit ... as an ornamental. References oyamense Ferns of Asia Flora of Nepal Flora of East Himalaya Flora of Tibet Flora of North-Central China Flora of South-Central China Flora of Southeast China Flora of Taiwan Flora of Japan Flora of the Philippines Flora of the Maluku Islands Flora of New Guinea Plants described in 1933 {{Polypodiales-stub ...
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Gymnocarpium Jessoense
''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'' 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 *'' Gymnocarpium appalachianum'' – Appalachian oak fern *'' Gymnocarpium brittonianum'' *''Gymnocarpium dryopteris'' – (northern) oak fern *'' Gymnocarpium fedtschenkoanum'' *'' Gymnocarpium disjunctum'' *'' Gymnocarpium jessoense'' – western or Nahanni oak fern *''Gymnocarpium oyamense'' *''Gymnocarpium remotepinnatum'' *''Gymnocarpium robertianum ''Gymnocarpium robertianum'', the limestone fern or scen ...
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