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Struthiopteris Hancockii
''Struthiopteris'' is a genus of ferns belonging to the family Blechnaceae, subfamily Blechnoideae. Species In the circumscription used in the Pteridophyte Phylogeny Group classification of 2016 (PPG I), the genus contains five species. The ''Checklist of Ferns and Lycophytes of the World'' places three of these species in the genus ''Spicantopsis''. *''Struthiopteris amabilis'' (Makino) Ching (syn. ''Blechnum amabile'' Makino) = ''Spicantopsis amabilis'' (Makino) Nakai *''Struthiopteris castanea'' (Makino & Nemoto) Nakai (syns ''Lomaria castanea'' Makino, ''Blechnum castaneum'' Makino & Nemoto) *''Struthiopteris fallax'' (Lange) S.Molino, Gabriel y Galán & Wasowicz *''Struthiopteris hancockii'' (Hance) Tagawa (syn. ''Blechnum hancockii'' Hance) = ''Spicantopsis hancockii'' (Hance) Masam. *''Struthiopteris niponica'' (Kunze) Nakai (syns ''Lomaria niponica'' Kunze, ''Blechnum niponicum'' Makino) = ''Spicantopsis niponica'' (Kunze) Nakai *''Struthiopteris spicant ''Struthiopteri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Struthiopteris Spicant
''Struthiopteris spicant'', syn. ''Blechnum spicant'', is a species of fern in the family Blechnaceae, known by the common names hard-fern or deer fern. It is native to Europe, western Asia, northern Africa, and western North America. Like some other species in the family Blechnaceae, it has two types of leaves. The sterile leaves have flat, wavy-margined leaflets 5 to 8 millimeters wide, while the fertile leaves have much narrower leaflets, each with two thick rows of sori on the underside. The Latin specific epithet ''spicant'' is of uncertain origin, possibly referring to a tufted or spiky habit. ''S. spicant'' is hardy down to and evergreen, growing to . It has gained the Royal Horticultural Society's Award of Garden Merit. The species was first described in 1753 by Carl Linnaeus as ''Osmunda spicant''. It has been placed in a wide range of genera, including ''Blechnum'' (as ''Blechnum spicant''). In the Pteridophyte Phylogeny Group classification of 2016 (PPG I), ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genus
Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus comes above species and below family (taxonomy), family. In binomial nomenclature, the genus name forms the first part of the binomial species name for each species within the genus. :E.g. ''Panthera leo'' (lion) and ''Panthera onca'' (jaguar) are two species within the genus ''Panthera''. ''Panthera'' is a genus within the family Felidae. The composition of a genus is determined by taxonomy (biology), taxonomists. The standards for genus classification are not strictly codified, so different authorities often produce different classifications for genera. There are some general practices used, however, including the idea that a newly defined genus should fulfill these three criteria to be descriptively useful: # monophyly – all descendants ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fern
A fern (Polypodiopsida or Polypodiophyta ) is a member of a group of vascular plants (plants with xylem and phloem) that reproduce via spores and have neither seeds nor flowers. The polypodiophytes include all living pteridophytes except the lycopods, and differ from mosses and other bryophytes by being vascular, i.e., having specialized tissues that conduct water and nutrients and in having life cycles in which the branched sporophyte is the dominant phase. Ferns have complex leaves called megaphylls, that are more complex than the microphylls of clubmosses. Most ferns are leptosporangiate ferns. They produce coiled fiddleheads that uncoil and expand into fronds. The group includes about 10,560 known extant species. Ferns are defined here in the broad sense, being all of the Polypodiopsida, comprising both the leptosporangiate (Polypodiidae) and eusporangiate ferns, the latter group including horsetails, whisk ferns, marattioid ferns, and ophioglossoid ferns. Ferns first ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blechnaceae
Blechnaceae is a family of ferns in the order Polypodiales, with a cosmopolitan distribution. Its status as a family and the number of genera included have both varied considerably. In the Pteridophyte Phylogeny Group classification of 2016 (PPG I), the family has 24 genera, and excludes genera placed in the separate family Onocleaceae. The family is divided into three subfamilies, including Blechnoideae s.s. Alternatively, the entire family may be treated as the subfamily Blechnoideae s.l. of a very broadly defined family Aspleniaceae, and include genera others place in Onocleaceae. Description Most are ground dwelling, some are climbers, such as ''Stenochlaena''. A characteristic feature of many species is that the young opening fronds are usually tinged with red. Taxonomy The family was created by Newman in 1844. In 2014, Christenhusz and Chase submerged it as subfamily Blechnoideae within the family Aspleniaceae and included Onocleaceae in it. The PPG I classifica ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Circumscription (taxonomy)
In biological taxonomy, circumscription is the content of a taxon, that is, the delimitation of which subordinate taxa are parts of that taxon. If we determine that species X, Y, and Z belong in Genus A, and species T, U, V, and W belong in Genus B, those are our circumscriptions of those two genera. Another systematist might determine that T, U, V, W, X, Y, and Z all belong in genus A. Agreement on circumscriptions is not governed by the Codes of Zoological or Botanical Nomenclature, and must be reached by scientific consensus. A goal of biological taxonomy is to achieve a stable circumscription for every taxon. This goal conflicts, at times, with the goal of achieving a natural classification that reflects the evolutionary history of divergence of groups of organisms. Balancing these two goals is a work in progress, and the circumscriptions of many taxa that had been regarded as stable for decades are in upheaval in the light of rapid developments in molecular phylogenetics ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pteridophyte Phylogeny Group
The Pteridophyte Phylogeny Group, or PPG, is an informal international group of systematic botanists who collaborate to establish a consensus on the classification of pteridophytes (lycophytes and ferns) that reflects knowledge about plant relationships discovered through phylogenetic studies. In 2016, the group published a classification for extant pteridophytes, termed "PPG I". The paper had 94 authors (26 principal and 68 additional). PPG I A first classification, PPG I, was produced in 2016, covering only extant (living) pteridophytes. The classification was rank-based, using the ranks of class, subclass, order, suborder, family, subfamily and genus. Phylogeny The classification was based on a consensus phylogeny, shown below to the level of order. The very large order Polypodiales was divided into two suborders, as well as families not placed in a suborder: Classification to subfamily level To the level of subfamily, the PPG I classification is as follows. *Class Lycopodi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Struthiopteris Amabilis
''Struthiopteris'' is a genus of ferns belonging to the family Blechnaceae, subfamily Blechnoideae. Species In the circumscription used in the Pteridophyte Phylogeny Group classification of 2016 (PPG I), the genus contains five species. The ''Checklist of Ferns and Lycophytes of the World'' places three of these species in the genus ''Spicantopsis''. *''Struthiopteris amabilis'' (Makino) Ching (syn. ''Blechnum amabile'' Makino) = ''Spicantopsis amabilis'' (Makino) Nakai *''Struthiopteris castanea'' (Makino & Nemoto) Nakai (syns ''Lomaria castanea'' Makino, ''Blechnum castaneum'' Makino & Nemoto) *''Struthiopteris fallax'' (Lange) S.Molino, Gabriel y Galán & Wasowicz *''Struthiopteris hancockii'' (Hance) Tagawa (syn. ''Blechnum hancockii'' Hance) = ''Spicantopsis hancockii'' (Hance) Masam. *''Struthiopteris niponica'' (Kunze) Nakai (syns ''Lomaria niponica'' Kunze, ''Blechnum niponicum'' Makino) = ''Spicantopsis niponica'' (Kunze) Nakai *''Struthiopteris spicant ''Struthiopteri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Struthiopteris Castanea
''Struthiopteris'' is a genus of ferns belonging to the family Blechnaceae, subfamily Blechnoideae. Species In the circumscription used in the Pteridophyte Phylogeny Group classification of 2016 (PPG I), the genus contains five species. The ''Checklist of Ferns and Lycophytes of the World'' places three of these species in the genus ''Spicantopsis''. *''Struthiopteris amabilis'' (Makino) Ching (syn. ''Blechnum amabile'' Makino) = ''Spicantopsis amabilis'' (Makino) Nakai *''Struthiopteris castanea'' (Makino & Nemoto) Nakai (syns ''Lomaria castanea'' Makino, ''Blechnum castaneum'' Makino & Nemoto) *''Struthiopteris fallax'' (Lange) S.Molino, Gabriel y Galán & Wasowicz *''Struthiopteris hancockii'' (Hance) Tagawa (syn. ''Blechnum hancockii'' Hance) = ''Spicantopsis hancockii'' (Hance) Masam. *''Struthiopteris niponica'' (Kunze) Nakai (syns ''Lomaria niponica'' Kunze, ''Blechnum niponicum'' Makino) = ''Spicantopsis niponica'' (Kunze) Nakai *''Struthiopteris spicant ''Struthiopteri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Struthiopteris Fallax
''Struthiopteris fallax'' is a small species of fern in the family Blechnaceae. It is endemic to Iceland where it lives in close proximity to hot springs. In Iceland it is locally red listed as an endangered species (EN)Náttúrufræðistofnun Íslands celandic Institute of Natural History(1996). Válisti 1: Plöntur.' (in Icelandic) Reykjavík: Náttúrufræðistofnun Íslands. but as of April 2021 it has not been assessed by the IUCN The International Union for Conservation of Nature (IUCN; officially International Union for Conservation of Nature and Natural Resources) is an international organization working in the field of nature conservation and sustainable use of natu .... References Blechnaceae Flora of Iceland {{Polypodiales-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Struthiopteris Hancockii
''Struthiopteris'' is a genus of ferns belonging to the family Blechnaceae, subfamily Blechnoideae. Species In the circumscription used in the Pteridophyte Phylogeny Group classification of 2016 (PPG I), the genus contains five species. The ''Checklist of Ferns and Lycophytes of the World'' places three of these species in the genus ''Spicantopsis''. *''Struthiopteris amabilis'' (Makino) Ching (syn. ''Blechnum amabile'' Makino) = ''Spicantopsis amabilis'' (Makino) Nakai *''Struthiopteris castanea'' (Makino & Nemoto) Nakai (syns ''Lomaria castanea'' Makino, ''Blechnum castaneum'' Makino & Nemoto) *''Struthiopteris fallax'' (Lange) S.Molino, Gabriel y Galán & Wasowicz *''Struthiopteris hancockii'' (Hance) Tagawa (syn. ''Blechnum hancockii'' Hance) = ''Spicantopsis hancockii'' (Hance) Masam. *''Struthiopteris niponica'' (Kunze) Nakai (syns ''Lomaria niponica'' Kunze, ''Blechnum niponicum'' Makino) = ''Spicantopsis niponica'' (Kunze) Nakai *''Struthiopteris spicant ''Struthiopteri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Struthiopteris Niponica
''Struthiopteris'' is a genus of ferns belonging to the family Blechnaceae, subfamily Blechnoideae. Species In the circumscription used in the Pteridophyte Phylogeny Group classification of 2016 (PPG I), the genus contains five species. The ''Checklist of Ferns and Lycophytes of the World'' places three of these species in the genus ''Spicantopsis''. *''Struthiopteris amabilis'' (Makino) Ching (syn. ''Blechnum amabile'' Makino) = ''Spicantopsis amabilis'' (Makino) Nakai *''Struthiopteris castanea'' (Makino & Nemoto) Nakai (syns ''Lomaria castanea'' Makino, ''Blechnum castaneum'' Makino & Nemoto) *''Struthiopteris fallax'' (Lange) S.Molino, Gabriel y Galán & Wasowicz *''Struthiopteris hancockii'' (Hance) Tagawa (syn. ''Blechnum hancockii'' Hance) = ''Spicantopsis hancockii'' (Hance) Masam. *''Struthiopteris niponica'' (Kunze) Nakai (syns ''Lomaria niponica'' Kunze, ''Blechnum niponicum'' Makino) = ''Spicantopsis niponica'' (Kunze) Nakai *''Struthiopteris spicant ''Struthiopteri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
