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Antilla (orchid)
''Pleurothallis'' is a genus of orchids commonly called bonnet orchids. The genus name is derived from the Greek word , meaning "riblike branches". This refers to the rib-like stems of many species. The genus is often abbreviated as "Pths" in horticultural trade. This was a huge genus, which used to contain more than 1,200 species - the second largest in the Orchidaceae after ''Bulbophyllum''. In 2004, it decreased by more than half when many species were moved into new genera. Distribution ''Pleurothallis'' is a completely New World group, widespread across much of Mexico, Central America, South America and the West Indies. Flora of North America lists one species in Florida ''(P. gelina)'' but this has now been transferred to a different genus, ''Stelis''. The center of diversity of the genus is in the high Andes, especially in the chain of cloud forests in Colombia. ''Pleurothallis'' grows in dry or wet, tropical or temperate climates. Description As a group they show a huge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pleurothallis Epiglottis
''Pleurothallis'' is a genus of orchids commonly called bonnet orchids. The genus name is derived from the Greek word , meaning "riblike branches". This refers to the rib-like stems of many species. The genus is often abbreviated as "Pths" in horticultural trade. This was a huge genus, which used to contain more than 1,200 species - the second largest in the Orchidaceae after ''Bulbophyllum''. In 2004, it decreased by more than half when many species were moved into new genera. Distribution ''Pleurothallis'' is a completely New World group, widespread across much of Mexico, Central America, South America and the West Indies. Flora of North America lists one species in Florida ''(P. gelina)'' but this has now been transferred to a different genus, ''Stelis''. The center of diversity of the genus is in the high Andes, especially in the chain of cloud forests in Colombia. ''Pleurothallis'' grows in dry or wet, tropical or temperate climates. Description As a group they show a huge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Epiphyte
An epiphyte is an organism that grows on the surface of a plant and derives its moisture and nutrients from the air, rain, water (in marine environments) or from debris accumulating around it. The plants on which epiphytes grow are called phorophytes. Epiphytes take part in nutrient cycles and add to both the diversity and biomass of the ecosystem in which they occur, like any other organism. They are an important source of food for many species. Typically, the older parts of a plant will have more epiphytes growing on them. Epiphytes differ from parasites in that they grow on other plants for physical support and do not necessarily affect the host negatively. An organism that grows on another organism that is not a plant may be called an epibiont. Epiphytes are usually found in the temperate zone (e.g., many mosses, liverworts, lichens, and algae) or in the tropics (e.g., many ferns, cacti, orchids, and bromeliads). Epiphyte species make good houseplants due to their minimal wat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Areldia
''Pleurothallis'' is a genus of orchids commonly called bonnet orchids. The genus name is derived from the Greek word , meaning "riblike branches". This refers to the rib-like stems of many species. The genus is often abbreviated as "Pths" in horticultural trade. This was a huge genus, which used to contain more than 1,200 species - the second largest in the Orchidaceae after ''Bulbophyllum''. In 2004, it decreased by more than half when many species were moved into new genera. Distribution ''Pleurothallis'' is a completely New World group, widespread across much of Mexico, Central America, South America and the West Indies. Flora of North America lists one species in Florida ''(P. gelina)'' but this has now been transferred to a different genus, ''Stelis''. The center of diversity of the genus is in the high Andes, especially in the chain of cloud forests in Colombia. ''Pleurothallis'' grows in dry or wet, tropical or temperate climates. Description As a group they show a huge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apoda-prorepentia
''Pleurothallis'' is a genus of orchids commonly called bonnet orchids. The genus name is derived from the Greek word , meaning "riblike branches". This refers to the rib-like stems of many species. The genus is often abbreviated as "Pths" in horticultural trade. This was a huge genus, which used to contain more than 1,200 species - the second largest in the Orchidaceae after ''Bulbophyllum''. In 2004, it decreased by more than half when many species were moved into new genera. Distribution ''Pleurothallis'' is a completely New World group, widespread across much of Mexico, Central America, South America and the West Indies. Flora of North America lists one species in Florida ''(P. gelina)'' but this has now been transferred to a different genus, ''Stelis''. The center of diversity of the genus is in the high Andes, especially in the chain of cloud forests in Colombia. ''Pleurothallis'' grows in dry or wet, tropical or temperate climates. Description As a group they show a huge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antilla (orchid)
''Pleurothallis'' is a genus of orchids commonly called bonnet orchids. The genus name is derived from the Greek word , meaning "riblike branches". This refers to the rib-like stems of many species. The genus is often abbreviated as "Pths" in horticultural trade. This was a huge genus, which used to contain more than 1,200 species - the second largest in the Orchidaceae after ''Bulbophyllum''. In 2004, it decreased by more than half when many species were moved into new genera. Distribution ''Pleurothallis'' is a completely New World group, widespread across much of Mexico, Central America, South America and the West Indies. Flora of North America lists one species in Florida ''(P. gelina)'' but this has now been transferred to a different genus, ''Stelis''. The center of diversity of the genus is in the high Andes, especially in the chain of cloud forests in Colombia. ''Pleurothallis'' grows in dry or wet, tropical or temperate climates. Description As a group they show a huge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ancipitia
''Ancipitia'' is a genus of orchids originating from South America, currently consisting of 28 species. This genus was once considered part of ''Pleurothallis'' and, since publication in 2004 as a separate genus, is not yet fully accepted in all botanical forums. Species *'' Ancipitia anceps'' (Luer) Luer *'' Ancipitia anthrax'' (Luer & R. Escobar) Luer *'' Ancipitia caniceps'' (Luer) Luer *'' Ancipitia caprina'' (Luer & R. Escobar) Luer *'' Ancipitia condorensis'' (Luer & Hirtz) Luer *'' Ancipitia crocodiliceps'' (Rchb. f.) Luer *'' Ancipitia cypelligera'' (Luer & Hirtz) Luer *'' Ancipitia driessenii'' (Luer) Luer *'' Ancipitia dunstervillei'' (Foldats) Luer *'' Ancipitia duplex'' (Luer & R. Escobar) Luer *'' Ancipitia eumecocaulon'' (Schltr.) Luer *'' Ancipitia furcifera'' (Luer) Luer *'' Ancipitia glochis'' (Luer & R. Escobar) Luer *'' Ancipitia gratiosa'' (Rchb. f.) Luer *'' Ancipitia harpago'' (Luer) Luer *'' Ancipitia inornata'' (Luer & Hirtz) Luer *'' Ancipitia jimii'' (Lue ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acianthera
''Acianthera'' is a genus of orchids native to the tropical parts of the Western Hemisphere, especially Brazil.de Melo, M. C., Borba, E. L., & Paiva, E. A. S. (2010)Morphological and histological characterization of the osmophores and nectaries of four species of ''Acianthera'' (Orchidaceae: Pleurothallidinae).''Plant Systematics and Evolution'' 286(3-4), 141-51. It was first described in 1842 but was not widely recognized until recently. Most of the species were formerly placed under ''Pleurothallis'' subgenus ''Acianthera''. This splitting is a result of recent DNA sequencing. Species , Plants of the World Online accepted about 300 species within ''Acianthera'': *'' Acianthera aberrans'' (Luer) Pupulin & Bogarín *'' Acianthera aculeata'' (Luer & Hirtz) Luer *'' Acianthera acuminatipetala'' (A.Samp.) Luer *'' Acianthera adamantinensis'' (Brade) F.Barros *'' Acianthera adeodata'' P.Ortiz, O.Pérez & E.Parra *'' Acianthera adirii'' (Brade) Pridgeon & M.W.Chase *'' Acianthera aec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Evolution
Evolution is change in the heritable characteristics of biological populations over successive generations. These characteristics are the expressions of genes, which are passed on from parent to offspring during reproduction. Variation tends to exist within any given population as a result of genetic mutation and recombination. Evolution occurs when evolutionary processes such as natural selection (including sexual selection) and genetic drift act on this variation, resulting in certain characteristics becoming more common or more rare within a population. The evolutionary pressures that determine whether a characteristic is common or rare within a population constantly change, resulting in a change in heritable characteristics arising over successive generations. It is this process of evolution that has given rise to biodiversity at every level of biological organisation, including the levels of species, individual organisms, and molecules. The theory of evolution by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monophyletic
In cladistics for a group of organisms, monophyly is the condition of being a clade—that is, a group of taxa composed only of a common ancestor (or more precisely an ancestral population) and all of its lineal descendants. Monophyletic groups are typically characterised by shared derived characteristics ( synapomorphies), which distinguish organisms in the clade from other organisms. An equivalent term is holophyly. The word "mono-phyly" means "one-tribe" in Greek. Monophyly is contrasted with paraphyly and polyphyly as shown in the second diagram. A ''paraphyletic group'' consists of all of the descendants of a common ancestor minus one or more monophyletic groups. A '' polyphyletic group'' is characterized by convergent features or habits of scientific interest (for example, night-active primates, fruit trees, aquatic insects). The features by which a polyphyletic group is differentiated from others are not inherited from a common ancestor. These definitions have tak ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Missouri Botanical Garden
The Missouri Botanical Garden is a botanical garden located at 4344 Shaw Boulevard in St. Louis, Missouri. It is also known informally as Shaw's Garden for founder and philanthropist Henry Shaw. Its herbarium, with more than 6.6 million specimens, is the second largest in North America, behind that of the New York Botanical Garden. The '' Index Herbariorum'' code assigned to the herbarium is MO and it is used when citing housed specimens. History The land that is currently the Missouri Botanical Garden was previously the land of businessman Henry Shaw. Founded in 1859, the Missouri Botanical Garden is one of the oldest botanical institutions in the United States and a National Historic Landmark. It is also listed in the National Register of Historic Places. In 1983, the botanical garden was added as the fourth subdistrict of the Metropolitan Zoological Park and Museum District. The garden is a center for botanical research and science education of international repute, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pollination
Pollination is the transfer of pollen from an anther of a plant to the stigma of a plant, later enabling fertilisation and the production of seeds, most often by an animal or by wind. Pollinating agents can be animals such as insects, birds, and bats; water; wind; and even plants themselves, when self-pollination occurs within a closed flower. Pollination often occurs within a species. When pollination occurs between species, it can produce hybrid offspring in nature and in plant breeding work. In angiosperms, after the pollen grain (gametophyte) has landed on the stigma, it germinates and develops a pollen tube which grows down the style until it reaches an ovary. Its two gametes travel down the tube to where the gametophyte(s) containing the female gametes are held within the carpel. After entering an ovum cell through the micropyle, one male nucleus fuses with the polar bodies to produce the endosperm tissues, while the other fuses with the ovule to produce the embr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gnat
A gnat () is any of many species of tiny flying insects in the dipterid suborder Nematocera, especially those in the families Mycetophilidae, Anisopodidae and Sciaridae. They can be both biting and non-biting. Most often they fly in large numbers, called clouds. "Gnat" is a loose descriptive category rather than a phylogenetic or other technical term, so there is no scientific consensus on what constitutes a gnat. Some entomologists consider only non-biting flies to be gnats. Certain universities and institutes also distinguish eye gnats: the Smithsonian Institution describes them as "non-biting flies, no bigger than a few grains of salt, ... attracted to fluids secreted by your eyes". Description As nematoceran flies, adult gnats have antennae with at least six segments that are often long and slender. They are generally slender-bodied with long and narrow wings. Black fly (Simuliidae) and biting midges (Ceratopogonidae), also belonging to the gnat category, are small, so ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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