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Jamesonia
''Jamesonia'' is a genus of ferns in the subfamily Pteridoideae of the family Pteridaceae. It now includes the formerly separate genus ''Eriosorus''. Description Species of ''Jamesonia'' are terrestrial or grow on rocks. They vary considerably in their detailed morphology. The rhizomes are short, dark brown, and creeping, with a more or less dense covering of hairs and bristles. The fertile and infertile fronds are similar. Species show one of two different frond morphologies, related to habitat. These were formerly used to distinguish ''Jamesonia'' and ''Eriosorus'', but do not correspond to the evolutionary history of the species. Species with "''Jamesonia''-type" morphology have many fronds with short, often leathery pinnae, and are associated with exposed habitats. Species with "''Eriosorus''-type" morphology have fewer fronds with longer, thinner pinnae, and are associated with more sheltered areas including cloud forests. The stalks ( petioles and rachises) of the frond ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jamesonia Ascendens
''Jamesonia'' is a genus of ferns in the subfamily Pteridoideae of the family Pteridaceae. It now includes the formerly separate genus ''Eriosorus''. Description Species of ''Jamesonia'' are terrestrial or grow on rocks. They vary considerably in their detailed morphology. The rhizomes are short, dark brown, and creeping, with a more or less dense covering of hairs and bristles. The fertile and infertile fronds are similar. Species show one of two different frond morphologies, related to habitat. These were formerly used to distinguish ''Jamesonia'' and ''Eriosorus'', but do not correspond to the evolutionary history of the species. Species with "''Jamesonia''-type" morphology have many fronds with short, often leathery Glossary of botanical terms#pinna, pinnae, and are associated with exposed habitats. Species with "''Eriosorus''-type" morphology have fewer fronds with longer, thinner pinnae, and are associated with more sheltered areas including cloud forests. The stalks (Petiol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jamesonia Angusta
''Jamesonia'' is a genus of ferns in the subfamily Pteridoideae of the family Pteridaceae. It now includes the formerly separate genus ''Eriosorus''. Description Species of ''Jamesonia'' are terrestrial or grow on rocks. They vary considerably in their detailed morphology. The rhizomes are short, dark brown, and creeping, with a more or less dense covering of hairs and bristles. The fertile and infertile fronds are similar. Species show one of two different frond morphologies, related to habitat. These were formerly used to distinguish ''Jamesonia'' and ''Eriosorus'', but do not correspond to the evolutionary history of the species. Species with "''Jamesonia''-type" morphology have many fronds with short, often leathery pinnae, and are associated with exposed habitats. Species with "''Eriosorus''-type" morphology have fewer fronds with longer, thinner pinnae, and are associated with more sheltered areas including cloud forests. The stalks ( petioles and rachises) of the frond are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jamesonia Alstonii
''Jamesonia'' is a genus of ferns in the subfamily Pteridoideae of the family Pteridaceae. It now includes the formerly separate genus ''Eriosorus''. Description Species of ''Jamesonia'' are terrestrial or grow on rocks. They vary considerably in their detailed morphology. The rhizomes are short, dark brown, and creeping, with a more or less dense covering of hairs and bristles. The fertile and infertile fronds are similar. Species show one of two different frond morphologies, related to habitat. These were formerly used to distinguish ''Jamesonia'' and ''Eriosorus'', but do not correspond to the evolutionary history of the species. Species with "''Jamesonia''-type" morphology have many fronds with short, often leathery pinnae, and are associated with exposed habitats. Species with "''Eriosorus''-type" morphology have fewer fronds with longer, thinner pinnae, and are associated with more sheltered areas including cloud forests. The stalks ( petioles and rachises) of the frond are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jamesonia Accrescens
''Jamesonia'' is a genus of ferns in the subfamily Pteridoideae of the family Pteridaceae. It now includes the formerly separate genus ''Eriosorus''. Description Species of ''Jamesonia'' are terrestrial or grow on rocks. They vary considerably in their detailed morphology. The rhizomes are short, dark brown, and creeping, with a more or less dense covering of hairs and bristles. The fertile and infertile fronds are similar. Species show one of two different frond morphologies, related to habitat. These were formerly used to distinguish ''Jamesonia'' and ''Eriosorus'', but do not correspond to the evolutionary history of the species. Species with "''Jamesonia''-type" morphology have many fronds with short, often leathery pinnae, and are associated with exposed habitats. Species with "''Eriosorus''-type" morphology have fewer fronds with longer, thinner pinnae, and are associated with more sheltered areas including cloud forests. The stalks ( petioles and rachises) of the frond are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jamesonia Pulchra
''Jamesonia'' is a genus of ferns in the subfamily Pteridoideae of the family Pteridaceae. It now includes the formerly separate genus ''Eriosorus''. Description Species of ''Jamesonia'' are terrestrial or grow on rocks. They vary considerably in their detailed morphology. The rhizomes are short, dark brown, and creeping, with a more or less dense covering of hairs and bristles. The fertile and infertile fronds are similar. Species show one of two different frond morphologies, related to habitat. These were formerly used to distinguish ''Jamesonia'' and ''Eriosorus'', but do not correspond to the evolutionary history of the species. Species with "''Jamesonia''-type" morphology have many fronds with short, often leathery pinnae, and are associated with exposed habitats. Species with "''Eriosorus''-type" morphology have fewer fronds with longer, thinner pinnae, and are associated with more sheltered areas including cloud forests. The stalks ( petioles and rachises) of the frond are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pteridaceae
Pteridaceae is a family of ferns in the order Polypodiales, including some 1150 known species in ca 45 genera (depending on taxonomic opinions), divided over five subfamilies. The family includes four groups of genera that are sometimes recognized as separate families: the adiantoid, cheilanthoid, pteridoid, and hemionitidoid ferns. Relationships among these groups remain unclear, and although some recent genetic analyses of the Pteridales suggest that neither the family Pteridaceae nor the major groups within it are all monophyletic, as yet these analyses are insufficiently comprehensive and robust to provide good support for a revision of the order at the family level. Description Members of Pteridaceae have creeping or erect rhizomes. The leaves are almost always compound and have linear sori that are typically on the margins of the leaves and lack a true indusium, typically being protected by a false indusium formed from the reflexed margin of the leaf. Taxonomy Tradi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
William Jameson (botanist, Born 1796)
William ("Gulielmo") Jameson (1796–1873) was a Scottish- Ecuadorian botanist. He was born in Edinburgh and studied at the Royal College of Surgeons of Edinburgh. He made several voyages as a ship's surgeon, first to Baffin Bay, then to South America. In 1826 he settled in Quito, Ecuador. He was then appointed professor of chemistry and botany at Universidad Central del Ecuador. He went back to Edinburgh in 1869, returned to Quito in 1872, and died shortly thereafter. Jameson made botanical investigations and collections in Greenland, Ecuador and in other South American countries. He began writing a flora of Ecuador, ''Synopsis Plantarum Aequatoriensium'', of which Volumes 1 and 2 were published in 1865. The work was not completed. Jameson is commemorated in the name of the Andean snipe, ''Gallinago jamesoni'', and a species of Buddleja bush found in Ecuador, ''Buddleja jamesonii''. As well as ''Jamesonia'' by in the Pteridaceae family, first published in 1830, and ''Jamesoniell ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pteridoideae
''Pteridoideae'' is one of the five subfamilies of the fern family Pteridaceae. This subfamily contains about 14 genera and around 400 species. Taxonomy Phylogeny The following diagram shows a likely phylogenic relationship between Pteridoideae and the other the Pteridaceae subfamilies. The cladogram below shows one hypothesis for the evolutionary relationships among the genera of the Pteridoideae, based on a maximum likelihood analysis using six plastid markers. The authors of the study identified four major clades. The ''Pteris'' and JAPSTT clades are found worldwide; the GAPCC clade is pantropical; and the ''Actiniopteris''+''Onychium'' clade is restricted to the Old World. Genera The Pteridophyte Phylogeny Group classification of 2016 (PPG I) recognized 13 genera. Shortly afterwards, the genus ''Gastoniella'' was created for three species formerly placed in ''Anogramma'' which a molecular phylogenetic analysis had shown to be distinct. *'' Actiniopteris'' Link *'' Anogra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tryonia (plant)
''Tryonia'' is a genus of ferns in the subfamily Pteridoideae of the family Pteridaceae. Species are native to the east of Brazil and to Uruguay. The genus was circumscribed by Eric Schuettpelz, Jefferson Prado and Alyssa T. Cochran in PhytoKeys vol.35 on page 35 in 2014. The genus name of ''Tryonia'' is in honour of Alice F. Tryon (1920–2009), who was an American botanist (mainly pteridology). She examined the taxonomy of the fern genera ''Jamesonia ''Jamesonia'' is a genus of ferns in the subfamily Pteridoideae of the family Pteridaceae. It now includes the formerly separate genus ''Eriosorus''. Description Species of ''Jamesonia'' are terrestrial or grow on rocks. They vary considerably ...''. Species , the ''Checklist of Ferns and Lycophytes of the World'' recognized the following species: *'' Tryonia areniticola'' (Schwartsb. & Labiak) Schuettp., J.Prado & A.T.Cochran *'' Tryonia macrophylla'' A.Rojas *'' Tryonia myriophylla'' (Sw.) Schuettp., J.Prado & A.T.Cochr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Molecular Phylogenetics
Molecular phylogenetics () is the branch of phylogeny that analyzes genetic, hereditary molecular differences, predominantly in DNA sequences, to gain information on an organism's evolutionary relationships. From these analyses, it is possible to determine the processes by which diversity among species has been achieved. The result of a molecular phylogenetic analysis is expressed in a phylogenetic tree. Molecular phylogenetics is one aspect of molecular systematics, a broader term that also includes the use of molecular data in taxonomy and biogeography. Molecular phylogenetics and molecular evolution correlate. Molecular evolution is the process of selective changes (mutations) at a molecular level (genes, proteins, etc.) throughout various branches in the tree of life (evolution). Molecular phylogenetics makes inferences of the evolutionary relationships that arise due to molecular evolution and results in the construction of a phylogenetic tree. History The theoretical frame ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Robert Kaye Greville
Dr. Robert Kaye Greville FRSE FLS LLD (13 December 1794 – 4 June 1866) was an England, English mycologist, bryology, bryologist, and botanist. He was an accomplished artist and illustrator of natural history. In addition to art and science he was interested in causes like Abolitionism in the United Kingdom, abolitionism, capital punishment, keeping Sunday special and the temperance movement. He has a mountain in Queensland named after him. Biography Greville was born at Bishop Auckland, County Durham, Durham, but was brought up in Derbyshire by his parents Dorothy ( Chaloner) and Robert Greville. His father who liked to compose was the rector of St James' Church, Edlaston, the parish church in Edlaston in Derbyshire. Greville had an interest in natural history since he was very young, but he originally studied medicine. Realising that he did not need an income he discarded four years of medical education in London and Edinburgh and decided to concentrated on botany which ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Species
In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. Other ways of defining species include their karyotype, DNA sequence, morphology, behaviour or ecological niche. In addition, paleontologists use the concept of the chronospecies since fossil reproduction cannot be examined. The most recent rigorous estimate for the total number of species of eukaryotes is between 8 and 8.7 million. However, only about 14% of these had been described by 2011. All species (except viruses) are given a two-part name, a "binomial". The first part of a binomial is the genus to which the species belongs. The second part is called the specific name or the specific epithet (in botanical nomenclature, also sometimes i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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