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Isoplexis
''Digitalis'' sect. ''Isoplexis'' is a section of four species of flowering plants within the genus ''Digitalis'' in the plantain family Plantaginaceae. The species of section ''Isoplexis'' differ from other plants in the genus ''Digitalis'' in that their monosymmetric (sometimes called zygomorphic) flowers have a distinctive large upper lip rather than large lower lip and the species are endemic to the Canary Islands (the species ''D. canariensis'', ''D. chalcantha'', and ''D. isabelliana'') and Madeira (''D. sceptrum''). Taxonomy Two ''Isoplexis'' species, ''D. canariensis'' and ''D. sceptrum'', were first described by Carl Linnaeus in 1753 as part of the genus ''Digitalis''. Since then the section has undergone several changes, the addition of two more species and more importantly being moved to a separate genus, under the genus name of ''Isoplexis'' or sometimes ''Callianassa'', back and forth many times (Lindley 1821, Loudon 1829, Bentham 1835, Webb 1845, Wetstein 189 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Digitalis Canariensis
''Digitalis canariensis'' (common name: Canary Island foxglove) is a member of the genus ''Digitalis''. Taxonomy This species is part of Section (botany), section ''Isoplexis'', which was temporarily accepted as an own genus. The Synonym (taxonomy), synonym ''Isoplexis canariensis'' also continues to be used. In general, as of 2017, opinions concerning the taxonomic status of ''Isoplexis'' species differ depending on the source. Description Individuals of these species are small, evergreen plants growing into rounded shrubs up to 150 cm tall. The plant has lanceolate-ovoid leaves with toothed margins. The leaves are spirally arranged. The inflorescence is a cluster of orange-reddish flowers up to 3 cm in length, with short petals and noticeable upper and lower lip. Bird pollination by the island populations of ''Phylloscopus'' species has been documented. The fruit is a capsule. ''Digitalis canariensis'' contains Cardenolide, cardenolides (cardiac glycosides),P. Studer, S. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isoplexis Canariensis
''Digitalis canariensis'' (common name: Canary Island foxglove) is a member of the genus ''Digitalis''. Taxonomy This species is part of section ''Isoplexis'', which was temporarily accepted as an own genus. The synonym ''Isoplexis canariensis'' also continues to be used. In general, as of 2017, opinions concerning the taxonomic status of ''Isoplexis'' species differ depending on the source. Description Individuals of these species are small, evergreen plants growing into rounded shrubs up to 150 cm tall. The plant has lanceolate-ovoid leaves with toothed margins. The leaves are spirally arranged. The inflorescence is a cluster of orange-reddish flowers up to 3 cm in length, with short petals and noticeable upper and lower lip. Bird pollination by the island populations of '' Phylloscopus'' species has been documented. The fruit is a capsule. ''Digitalis canariensis'' contains cardenolides (cardiac glycosides),P. Studer, S. K. Pavanaram, C. R. Gavilanes, Horst Linde, Kuno M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Digitalis
''Digitalis'' ( or ) is a genus of about 20 species of herbaceous perennial plants, shrubs, and Biennial plant, biennials, commonly called foxgloves. ''Digitalis'' is native to Europe, Western Asia, and northwestern Africa. The flowers are tubular in shape, produced on a tall spike, and vary in colour with species, from purple to pink, white, and yellow. The name derives from the Latin word for "finger". The genus was traditionally placed in the figwort family, Scrophulariaceae, but phylogenetic research led taxonomists to move it to the Veronicaceae in 2001. More recent phylogenetic work has placed it in the much enlarged family Plantaginaceae. The best-known species is the common foxglove, ''Digitalis purpurea''. This biennial is often grown as an ornamental plant due to its vivid flowers, which range in colour from various purple tints through pink and purely white. The flowers can also possess various marks and spottings. Other garden-worthy species include ''D. ferrugi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isoplexis Isabelliana
''Digitalis isabelliana'', known commonly as Canary Island foxglove, Isabel's foxglove, or Gran Canaria Pineforest foxglove, is a type of flowering shrub, one of three species of foxglove native to the Canary Islands. Description ''Digitalis isabelliana'' is a broadleaf evergreen perennial shrub, growing up to in height, with a much-branched woody base. The leaves are broadly ovate, dark green, glabrous, and with a serrated margin. The flowers are russet, orange or terracotta in colour, with long, beak-shaped hoods, and grow in long spikes. Distribution and habitat ''Digitalis isabelliana'' grows primarily in the subtropical biome of the Canary Islands, where it is endemic Endemism is the state of a species being found only 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 foun ... to Gran Canaria, where it occurs on the moister north ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Canary Islands
The Canary Islands (; ) or Canaries are an archipelago in the Atlantic Ocean and the southernmost Autonomous communities of Spain, Autonomous Community of Spain. They are located in the northwest of Africa, with the closest point to the continent being 100 kilometres (62 miles) away. The islands have a population of 2.25 million people and are the most populous overseas Special member state territories and the European Union, special territory of the European Union. The seven main islands are from largest to smallest in area, Tenerife, Fuerteventura, Gran Canaria, Lanzarote, La Palma, La Gomera, and El Hierro. The only other populated island is Graciosa, Canary Islands, La Graciosa, which administratively is dependent on Lanzarote. The archipelago includes many smaller islands and islets, including Alegranza, Islote de Lobos, Isla de Lobos, Montaña Clara, Roque del Oeste, and Roque del Este. It includes a number of rocks, including Roque de Garachico, Garachico and Roques de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Canarina
''Canarina'' is a genus of flowering plants within the family Campanulaceae. They are herbaceous perennial vines with bell-shaped flowers. The best known species is '' Canarina canariensis'' from the laurel forests of the Canary Islands which is grown as an ornamental plant. ''C. canariensis'' is one of a group of unrelated Canarian plants that appear to be adapted for bird pollination, including the members of the genera ''Isoplexis'' and '' Lotus''. It was once thought that the original pollinators of these plants were sunbirds which had become extinct on the Canary Islands, explaining why some of these species are rare and considered endangered (Vogel 1954; Vogel et al. 1984; Olesen 1985; Valido et al. 2004). However more recent work has shown that these plants are adequately pollinated by non-specialist flower visiting birds, particularly the Canary Islands chiffchaff (''Phylloscopus canariensis'') and the Canary Island spectacled warbler (''Sylvia conspicillata orbitalis'') ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bird Pollination
Ornithophily or bird pollination is the pollination of flowering plants by birds. This sometimes (but not always) coevolutionary association is derived from insect pollination (entomophily) and is particularly well developed in some parts of the world, especially in the tropics, Southern Africa, and on some island chains. The association involves several distinctive plant adaptations forming a "pollination syndrome". The plants typically have colourful, often red, flowers with long tubular structures holding ample nectar and orientations of the stamen and stigma that ensure contact with the pollinator. Birds involved in ornithophily tend to be specialist nectarivores with brushy tongues and long bills, that are either capable of hovering flight or light enough to perch on the flower structures. Plant adaptations Plant adaptations for ornithophily can be grouped primarily into those that attract and facilitate pollen transfer by birds, and those that exclude other groups, primaril ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hexose
In chemistry, a hexose is a monosaccharide (simple sugar) with six carbon atoms. The chemical formula for all hexoses is , and their molecular weight is 180.156 g/mol. Hexoses exist in two forms, open-chain or cyclic, that easily convert into each other in aqueous solutions. The open-chain form of a hexose, which usually is favored in solutions, has the general structure , where ''n'' is 1, 2, 3, 4, 5. Namely, five of the carbons have one hydroxyl functional group () each, connected by a single bond, and one has an oxo group (), forming a carbonyl group (). The remaining bonds of the carbon atoms are satisfied by seven hydrogen atoms. The carbons are commonly numbered 1 to 6 starting at the end closest to the carbonyl. Hexoses are extremely important in biochemistry, both as isolated molecules (such as glucose and fructose) and as building blocks of other compounds such as starch, cellulose, and glycosides. Hexoses can form dihexose (like sucrose) by a condensation re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sylvia Melanocephala
The Sardinian warbler (''Curruca melanocephala'') is a common and widespread typical warbler from the Mediterranean region. Like most ''Curruca'' species, it has distinct male and female plumages. The adult male has a grey back, whitish underparts, black head, white throat and red eyes. Plumages are somewhat variable even in the same locality, with the intensity of a reddish hue on upper- and/or underside that varies from absent to (in some subspecies) pronounced. The female is mainly brown above and buff below, with a grey head. The Sardinian warbler's song is fast and rattling, and is very characteristic of the Mediterranean areas where this bird breeds. Taxonomy and systematics The Sardinian warbler was formally described in 1789 by the German naturalist Johann Friedrich Gmelin in his revised and expanded edition of Carl Linnaeus's ''Systema Naturae''. He placed it with the wagtails in the genus '' Motacilla'' and coined the binomial name ''Motacilla melanocephala''. Gmelin bas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Canary Islands Chiffchaff
The Canary Islands chiffchaff (''Phylloscopus canariensis'') is a species of leaf warbler endemic to the Canary Islands, Spain. Sometimes the English name is spelled Canary Island chiffchaff. Taxonomy Previously the Canary Island chiffchaff was considered as a subspecies of the common chiffchaff (''Phylloscopus collybita''). Now it is recognised as a separate species under the name ''Phylloscopus canariensis''. Subspecies There are two recognised subspecies but the Lanzarote subspecies is probably extinct; they are: * Western Canary Islands chiffchaff (''Phylloscopus canariensis canariensis''): western Canary Islands: El Hierro, La Palma, La Gomera, Tenerife, and Gran Canaria * † Eastern Canary Islands chiffchaff (''Phylloscopus canariensis exsul''): eastern Canary Islands: Lanzarote and possibly Fuerteventura. Description The Canary Islands chiffchaff is similar to the common chiffchaff and the Iberian chiffchaff but compared to the common chiffchaff it has a longer bil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endangered Species
An endangered species is a species that is very likely to become extinct in the near future, either worldwide or in a particular political jurisdiction. Endangered species may be at risk due to factors such as habitat loss, poaching, invasive species, and climate change. The International Union for Conservation of Nature (IUCN) Red List lists the global conservation status of many species, and various other agencies assess the status of species within particular areas. Many nations have laws that protect conservation-reliant species which, for example, forbid hunting, restrict land development, or create protected areas. Some endangered species are the target of extensive conservation efforts such as captive breeding and habitat restoration. Human activity is a significant cause in causing some species to become endangered. Conservation status The conservation status of a species indicates the likelihood that it will become extinct. Multiple factors are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sunbird
Sunbirds and spiderhunters make up the family Nectariniidae of passerine birds. They are small, slender passerines from the Old World, usually with downward-curved bills. Many are brightly coloured, often with iridescent feathers, particularly in the males. Many species also have especially long tail feathers. Their range extends through most of Africa to the Middle East, South Asia, South-east Asia and southern China, to Indonesia, New Guinea and northern Australia.. Species diversity is highest in equatorial regions. There are 152 species in 16 genera. Their family name is from most sunbirds feeding largely on nectar, but they will also catch insects and spiders, especially when feeding their young. Flowers that prevent access to their nectar because of their shape (for example, very long and narrow flowers) are simply punctured at the base near the nectaries, from which the birds sip the nectar. Fruit is also part of the diet of some species. Their flight is fast and direct, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
