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Leucotrichum
''Leucotrichum'' is a genus of ferns in the family Polypodiaceae, subfamily Grammitidoideae, according to the Pteridophyte Phylogeny Group classification of 2016 (PPG I). It is one of about 26 genera of "grammitids".Michael A. Sundue, Melissa B. Islam, and Tom A. Ranker. 2010. "Systematics of Grammitid Ferns (Polypodiaceae): Using Morphology and Plastid Sequence Data to Resolve the Circumscriptions of Melpomene and the Polyphyletic Genera Lellingeria and Terpsichore" ''Systematic Botany'' 35(4):701-715(15). (See ''External links'' below). The name of the genus refers to the white hairs that are usually present on the underside of the frond.Paulo H. Labiak, Germinal Rouhan, and Michael A. Sundue. 2010. "Phylogeny and taxonomy of ''Leucotrichum'' (Polypodiaceae): A new genus of grammitid ferns from the Neotropics". ''Taxon'' 59(3):911-921. Taxonomy ''Leucotrichum'' was established in 2010 and has about six currently recognized species. The type species for the genus is ''Leuco ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leucotrichum Organense
''Leucotrichum'' is a genus of ferns in the family Polypodiaceae, subfamily Grammitidoideae, according to the Pteridophyte Phylogeny Group classification of 2016 (PPG I). It is one of about 26 genera of "grammitids".Michael A. Sundue, Melissa B. Islam, and Tom A. Ranker. 2010. "Systematics of Grammitid Ferns (Polypodiaceae): Using Morphology and Plastid Sequence Data to Resolve the Circumscriptions of Melpomene and the Polyphyletic Genera Lellingeria and Terpsichore" ''Systematic Botany'' 35(4):701-715(15). (See ''External links'' below). The name of the genus refers to the white hairs that are usually present on the underside of the frond.Paulo H. Labiak, Germinal Rouhan, and Michael A. Sundue. 2010. "Phylogeny and taxonomy of ''Leucotrichum'' (Polypodiaceae): A new genus of grammitid ferns from the Neotropics". ''Taxon'' 59(3):911-921. Taxonomy ''Leucotrichum'' was established in 2010 and has about six currently recognized species. The type species for the genus is ''Leuco ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leucotrichum Mortonii
''Leucotrichum'' is a genus of ferns in the family Polypodiaceae, subfamily Grammitidoideae, according to the Pteridophyte Phylogeny Group classification of 2016 (PPG I). It is one of about 26 genera of "grammitids".Michael A. Sundue, Melissa B. Islam, and Tom A. Ranker. 2010. "Systematics of Grammitid Ferns (Polypodiaceae): Using Morphology and Plastid Sequence Data to Resolve the Circumscriptions of Melpomene and the Polyphyletic Genera Lellingeria and Terpsichore" ''Systematic Botany'' 35(4):701-715(15). (See ''External links'' below). The name of the genus refers to the white hairs that are usually present on the underside of the frond.Paulo H. Labiak, Germinal Rouhan, and Michael A. Sundue. 2010. "Phylogeny and taxonomy of ''Leucotrichum'' (Polypodiaceae): A new genus of grammitid ferns from the Neotropics". ''Taxon'' 59(3):911-921. Taxonomy ''Leucotrichum'' was established in 2010 and has about six currently recognized species. The type species for the genus is ''Leuco ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leucotrichum Madagascariense
''Leucotrichum'' is a genus of ferns in the family Polypodiaceae, subfamily Grammitidoideae, according to the Pteridophyte Phylogeny Group classification of 2016 (PPG I). It is one of about 26 genera of "grammitids".Michael A. Sundue, Melissa B. Islam, and Tom A. Ranker. 2010. "Systematics of Grammitid Ferns (Polypodiaceae): Using Morphology and Plastid Sequence Data to Resolve the Circumscriptions of Melpomene and the Polyphyletic Genera Lellingeria and Terpsichore" ''Systematic Botany'' 35(4):701-715(15). (See ''External links'' below). The name of the genus refers to the white hairs that are usually present on the underside of the frond.Paulo H. Labiak, Germinal Rouhan, and Michael A. Sundue. 2010. "Phylogeny and taxonomy of ''Leucotrichum'' (Polypodiaceae): A new genus of grammitid ferns from the Neotropics". ''Taxon'' 59(3):911-921. Taxonomy ''Leucotrichum'' was established in 2010 and has about six currently recognized species. The type species for the genus is ''Leuco ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leucotrichum Mitchelliae
''Leucotrichum'' is a genus of ferns in the family Polypodiaceae, subfamily Grammitidoideae, according to the Pteridophyte Phylogeny Group classification of 2016 (PPG I). It is one of about 26 genera of "grammitids".Michael A. Sundue, Melissa B. Islam, and Tom A. Ranker. 2010. "Systematics of Grammitid Ferns (Polypodiaceae): Using Morphology and Plastid Sequence Data to Resolve the Circumscriptions of Melpomene and the Polyphyletic Genera Lellingeria and Terpsichore" ''Systematic Botany'' 35(4):701-715(15). (See ''External links'' below). The name of the genus refers to the white hairs that are usually present on the underside of the frond.Paulo H. Labiak, Germinal Rouhan, and Michael A. Sundue. 2010. "Phylogeny and taxonomy of ''Leucotrichum'' (Polypodiaceae): A new genus of grammitid ferns from the Neotropics". ''Taxon'' 59(3):911-921. Taxonomy ''Leucotrichum'' was established in 2010 and has about six currently recognized species. The type species for the genus is ''Leuco ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leucotrichum Pseudomitchelliae
''Leucotrichum'' is a genus of ferns in the family Polypodiaceae, subfamily Grammitidoideae, according to the Pteridophyte Phylogeny Group classification of 2016 (PPG I). It is one of about 26 genera of "grammitids".Michael A. Sundue, Melissa B. Islam, and Tom A. Ranker. 2010. "Systematics of Grammitid Ferns (Polypodiaceae): Using Morphology and Plastid Sequence Data to Resolve the Circumscriptions of Melpomene and the Polyphyletic Genera Lellingeria and Terpsichore" ''Systematic Botany'' 35(4):701-715(15). (See ''External links'' below). The name of the genus refers to the white hairs that are usually present on the underside of the frond.Paulo H. Labiak, Germinal Rouhan, and Michael A. Sundue. 2010. "Phylogeny and taxonomy of ''Leucotrichum'' (Polypodiaceae): A new genus of grammitid ferns from the Neotropics". ''Taxon'' 59(3):911-921. Taxonomy ''Leucotrichum'' was established in 2010 and has about six currently recognized species. The type species for the genus is ''Leuco ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leucotrichum Schenckii
''Leucotrichum'' is a genus of ferns in the family Polypodiaceae, subfamily Grammitidoideae, according to the Pteridophyte Phylogeny Group classification of 2016 (PPG I). It is one of about 26 genera of "grammitids".Michael A. Sundue, Melissa B. Islam, and Tom A. Ranker. 2010. "Systematics of Grammitid Ferns (Polypodiaceae): Using Morphology and Plastid Sequence Data to Resolve the Circumscriptions of Melpomene and the Polyphyletic Genera Lellingeria and Terpsichore" ''Systematic Botany'' 35(4):701-715(15). (See ''External links'' below). The name of the genus refers to the white hairs that are usually present on the underside of the frond.Paulo H. Labiak, Germinal Rouhan, and Michael A. Sundue. 2010. "Phylogeny and taxonomy of ''Leucotrichum'' (Polypodiaceae): A new genus of grammitid ferns from the Neotropics". ''Taxon'' 59(3):911-921. Taxonomy ''Leucotrichum'' was established in 2010 and has about six currently recognized species. The type species for the genus is ''Leuco ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grammitidoideae
Grammitidoideae is a subfamily of the fern family Polypodiaceae, whose members are informally known as grammitids. It comprises a clade of about 750 species. They are distributed over higher elevations in both the Old and New World. This group was previously treated as a separate family, Grammitidaceae until molecular phylogenies showed it to be nested within the Polypodiaceae. It has since been treated as an unranked clade within subfamily Polypodioideae (renamed tribe Polypodieae in one classification), and, most recently, as a separate subfamily (reducing Polypodioideae to an evolutionary grade). Circumscription In 2011, Christenhusz ''et al.'' placed the grammitid ferns in the subfamily Polypodioideae, within the Polypodiaceae, as an informal group without rank. In 2014, Christenhusz and Chase expanded the circumscription of both family and subfamily, placing the Polypodioideae as previously delimited, including grammitids, in tribe Polypodieae. The PPG I classification of 20 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lellingeria
''Lellingeria'' is a genus of ferns in the family Polypodiaceae, subfamily Grammitidoideae, according to the Pteridophyte Phylogeny Group classification of 2016 (PPG I). About 50–70 species of ''Lellingeria'' are known.Barbara S. Parris. 2009. "New genera of Malesian Grammitidaceae". ''Blumea'' 54(1-3):217-219. They are native to tropical areas of Madagascar, Africa, the Americas, and Pacific Islands. None are known in cultivation. ''Lellingeria'' was named for the American pteridologist David Lellinger.Alan R. Smith, Robbin C. Moran, and L. Earl Bishop. 1991. "''Lellingeria'', a new genus of Grammitidaceae". ''American Fern Journal'' 81(3):76-88. Description Mostly epiphytes. Rhizome radially symmetrical or dorsiventral, with clathrate, usually blackish scales that are attached across their entire base. Petiole absent or much shorter than the lamina. Sterile portion of frond shallowly to deeply pinnately divided. Fertile portion entire to deeply pinnately divided. (A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polypodiaceae
Polypodiaceae is a family of ferns. In the Pteridophyte Phylogeny Group classification of 2016 (PPG I), the family includes around 65 genera and an estimated 1,650 species and is placed in the order Polypodiales, suborder Polypodiineae. A broader circumscription has also been used, in which the family includes other families kept separate in PPG I. Nearly all species are epiphytes, but some are terrestrial. Description Stems of Polypodiaceae range from erect to long-creeping. The fronds are entire, pinnatifid, or variously forked or pinnate. The petioles lack stipules. The scaly rhizomes are generally creeping in nature. Polypodiaceae species are found in wet climates, most commonly in rain forests. In temperate zones, most species tend to be epiphytic or epipetric. Notable examples of ferns in this family include the resurrection fern (''Pleopeltis polypodioides'') and the golden serpent fern (''Phlebodium aureum''). Taxonomy Two distinct circumscriptions of the family are in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clade
A clade (), also known as a monophyletic group or natural group, is a group of organisms that are monophyletic – that is, composed of a common ancestor and all its lineal descendants – on a phylogenetic tree. Rather than the English term, the equivalent Latin term ''cladus'' (plural ''cladi'') is often used in taxonomical literature. The common ancestor may be an individual, a population, or a species (extinct or extant). Clades are nested, one in another, as each branch in turn splits into smaller branches. These splits reflect evolutionary history as populations diverged and evolved independently. Clades are termed monophyletic (Greek: "one clan") groups. Over the last few decades, the cladistic approach has revolutionized biological classification and revealed surprising evolutionary relationships among organisms. Increasingly, taxonomists try to avoid naming taxa that are not clades; that is, taxa that are not monophyletic. Some of the relationships between organisms ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Disjunct Distribution
In biology, a taxon with a disjunct distribution is one that has two or more groups that are related but considerably separated from each other geographically. The causes are varied and might demonstrate either the expansion or contraction of a species' range. Range fragmentation Also called range fragmentation, disjunct distributions may be caused by changes in the environment, such as mountain building and continental drift or rising sea levels; it may also be due to an organism expanding its range into new areas, by such means as rafting, or other animals transporting an organism to a new location (plant seeds consumed by birds and animals can be moved to new locations during bird or animal migrations, and those seeds can be deposited in new locations in fecal matter). Other conditions that can produce disjunct distributions include: flooding, or changes in wind, stream, and current flows, plus others such as anthropogenic introduction of alien introduced species either acciden ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endemism
Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsewhere. For example, the Cape sugarbird is found exclusively in southwestern South Africa and is therefore said to be ''endemic'' to that particular part of the world. An endemic species can be also be referred to as an ''endemism'' or in scientific literature as an ''endemite''. For example '' Cytisus aeolicus'' is an endemite of the Italian flora. '' Adzharia renschi'' was once believed to be an endemite of the Caucasus, but it was later discovered to be a non-indigenous species from South America belonging to a different genus. The extreme opposite of an endemic species is one with a cosmopolitan distribution, having a global or widespread range. A rare alternative term for a species that is endemic is "precinctive", which applies to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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