Gymnocarpium Appalachianum

	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 oa ... [...More Info...] [...Related Items...] OR:* [Wikipedia] [Google] [Baidu]
	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. References External links dryopteris :''The moth g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	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 ... [...More Info...] [...Related Items...] OR:* [Wikipedia] [Google] [Baidu]
	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. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	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 scent ... [...More Info...] [...Related Items...] OR:* [Wikipedia] [Google] [Baidu]
	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 The Royal Horticultural Society (RHS), founded in 1804 as the Horticultural Society of London, is the UK's leading gardening charity. The RHS promotes horticulture through its five gardens at Wisley (Surrey), Hyde Hall (Essex), Harlow Carr (Nor ...'s 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	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 scente ... [...More Info...] [...Related Items...] OR:* [Wikipedia] [Google] [Baidu]
	Gymnocarpium Disjunctum ''Gymnocarpium disjunctum'' is a species of fern in the family Cystopteridaceae, commonly known as Pacific oak fern, Hitchcock, C.L. and Cronquist, A. 2018. Flora of the Pacific Northwest, 2nd Edition, p. 58. University of Washington Press, Seattle. western oak fern, or Pacific oakfern. Description ''Gymnocarpium disjunctum'' is a medium green fern with delicate-looking leaves that grows from a long slender creeping rhizome. The leaves do not arise from a central point but rather grow up individually from the creeping rhizome, often forming a loose grouping on the forest floor. The petioles (stipes) are 1-3 mm in diameter and 12-44 cm long with sparse glandular hairs distally. The petiole and blade midribs are brownish green to black in color. The leaves are bright to medium green and are 20-68 cm in length, with a broadly deltate blade, and are 3-pinnate to pinnatifid. The abaxial (lower) leaf surface and rachis are glabrous (hairless) or with sparse glandular hairs, and the ada ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Gymnocarpium Fedtschenkoanum ''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 ... [...More Info...] [...Related Items...] OR:* [Wikipedia] [Google] [Baidu]
	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'' 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 sce ... [...More Info...] [...Related Items...] OR:* [Wikipedia] [Google] [Baidu]
	Dryopteris :''The moth genus ''Dryopteris'' is now considered a junior synonym of '' Oreta. ''Dryopteris'' , commonly called the wood ferns, male ferns (referring in particular to ''Dryopteris filix-mas''), or buckler ferns, is a fern genus in the family Dryopteridaceae, subfamily Dryopteridoideae, according to the Pteridophyte Phylogeny Group classification of 2016 (PPG I). There are about 300-400 species in the genus. The species are distributed in Asia, the Americas, Europe, Africa, and the Pacific islands, with the highest diversity in eastern Asia. It is placed in the family Dryopteridaceae, subfamily Dryopteridoideae, according to the Pteridophyte Phylogeny Group classification of 2016 (PPG I). Many of the species have stout, slowly creeping rootstocks that form a crown, with a vase-like ring of fronds. The sori are round, with a peltate indusium. The stipes have prominent scales. Hybridization and polyploidy are well-known phenomena in this group, with many species forme ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	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 oa ... [...More Info...] [...Related Items...] OR:* [Wikipedia] [Google] [Baidu]

	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 oa ... [...More Info...] [...Related Items...] OR:* [Wikipedia] [Google] [Baidu]
	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. References External links dryopteris :''The moth g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	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 ... [...More Info...] [...Related Items...] OR:* [Wikipedia] [Google] [Baidu]
	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. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	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 scent ... [...More Info...] [...Related Items...] OR:* [Wikipedia] [Google] [Baidu]
	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 The Royal Horticultural Society (RHS), founded in 1804 as the Horticultural Society of London, is the UK's leading gardening charity. The RHS promotes horticulture through its five gardens at Wisley (Surrey), Hyde Hall (Essex), Harlow Carr (Nor ...'s 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	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 scente ... [...More Info...] [...Related Items...] OR:* [Wikipedia] [Google] [Baidu]
	Gymnocarpium Disjunctum ''Gymnocarpium disjunctum'' is a species of fern in the family Cystopteridaceae, commonly known as Pacific oak fern, Hitchcock, C.L. and Cronquist, A. 2018. Flora of the Pacific Northwest, 2nd Edition, p. 58. University of Washington Press, Seattle. western oak fern, or Pacific oakfern. Description ''Gymnocarpium disjunctum'' is a medium green fern with delicate-looking leaves that grows from a long slender creeping rhizome. The leaves do not arise from a central point but rather grow up individually from the creeping rhizome, often forming a loose grouping on the forest floor. The petioles (stipes) are 1-3 mm in diameter and 12-44 cm long with sparse glandular hairs distally. The petiole and blade midribs are brownish green to black in color. The leaves are bright to medium green and are 20-68 cm in length, with a broadly deltate blade, and are 3-pinnate to pinnatifid. The abaxial (lower) leaf surface and rachis are glabrous (hairless) or with sparse glandular hairs, and the ada ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Gymnocarpium Fedtschenkoanum ''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 ... [...More Info...] [...Related Items...] OR:* [Wikipedia] [Google] [Baidu]
	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'' 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 sce ... [...More Info...] [...Related Items...] OR:* [Wikipedia] [Google] [Baidu]
	Dryopteris :''The moth genus ''Dryopteris'' is now considered a junior synonym of '' Oreta. ''Dryopteris'' , commonly called the wood ferns, male ferns (referring in particular to ''Dryopteris filix-mas''), or buckler ferns, is a fern genus in the family Dryopteridaceae, subfamily Dryopteridoideae, according to the Pteridophyte Phylogeny Group classification of 2016 (PPG I). There are about 300-400 species in the genus. The species are distributed in Asia, the Americas, Europe, Africa, and the Pacific islands, with the highest diversity in eastern Asia. It is placed in the family Dryopteridaceae, subfamily Dryopteridoideae, according to the Pteridophyte Phylogeny Group classification of 2016 (PPG I). Many of the species have stout, slowly creeping rootstocks that form a crown, with a vase-like ring of fronds. The sori are round, with a peltate indusium. The stipes have prominent scales. Hybridization and polyploidy are well-known phenomena in this group, with many species forme ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	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 oa ... [...More Info...] [...Related Items...] OR:* [Wikipedia] [Google] [Baidu]