|
Trochetiopsis Erythroxylon
''Trochetiopsis erythroxylon'', the Saint Helena redwood, is a species of plant, now extinct in the wild. It was formerly abundant enough in the upland parts of the island of Saint Helena for early settlers in the 17th century to use the timber to make their homes. It became extinct in the 1950's due to deforestation as its habitat was cleared to make way for pasture, timber and fuel. The St. Helena Redwood was used as an early example of ex situ conservation when the governor of St. Helena obtained a couple seedlings and planted them in his garden. It now exists in cultivation, although cultivated stock is weak. This species has pendant flowers, petals that turn pink with age, and white staminodes. Saint Helena redwood is completely unrelated to the redwood tree of California and other trees called redwood. It is, however, in the same genus as the Saint Helena ebony ('' Trochetiopsis ebenus'') and a hybrid between them (''Trochetiopsis × benjamini'') is now often planted ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trochetiopsis
The flowering plant genus ''Trochetiopsis'' consists of two extant and one extinct species endemic to the island of Saint Helena (South Atlantic Ocean). They were formerly placed in the family Sterculiaceae, but this is included in the expanded Malvaceae in the APG and most subsequent systematics. There is evidence from fossil pollen that the ''Trochetiopsis'' lineage has been on Saint Helena since the late Miocene (some 9.5 million years). Description The species of this genus were formerly included in the genus ''Trochetia'', but were separated by Marais in 1981 on the basis of geography and morphological characters. Unlike in ''Trochetia'', the ''Trochetiopsis'' flowers have only five stamens, and the sepals generally have appressed sericeous indumentum on their interior faces (although one species, ''T. melanoxylon'', lacks this last character). The wood of all the species is attractively coloured and is used in island inlay work. Phylogeny ''Trochetiopsis'' is closel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trochetia Erythroxylon - Copenhagen Botanical Garden - DSC08023
''Trochetia'' is a genus of flowering plants from the family Malvaceae (formerly in the Sterculiaceae, but this family is now usually subsumed in the Malvaceae). They are endemic to the Mascarene Islands. The genus was first described by A.P. de Candolle in 1823, who named it in honour of French botanist Henri Dutrochet. Description and ecology The genus ''Trochetia'' consists of scrubs or small trees, which can reach a height from two to eight metres. The hermaphroditic flowers are either white (''T. triflora''), pink (''T. parviflora''), or reddish orange (''T. boutoniana''). They are either single-standing, or grow in a cluster of three flowers. Some species have bell-shaped petals. All plants of this genus are imperiled due to the competition of invasive species, like the guavas from China but also by destruction caused by introduced monkeys and rats. Five species occur on Mauritius and one on La Reunion. The habitat consists of humid forests with a high annual rainfall or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Forst
Forst may refer to: Communities In Germany *, in the district of Aachen *Forst (Baden), in Baden-Württemberg *Forst (Lausitz), in Brandenburg * Forst (Unterfranken), part of Schonungen, Bavaria * Forst, Altenkirchen, in the district of Altenkirchen, Rhineland-Palatinate * Forst (Eifel), in the district Cochem-Zell, Rhineland-Palatinate * Forst (Hunsrück), in the district Cochem-Zell, Rhineland-Palatinate *Forst an der Weinstraße, in the district of Bad Dürkheim, Rhineland-Palatinate *Forst, Lower Saxony, a district of Bevern, known for its residents Roedelius and Moebius in the 1970s In Italy * Forst (Foresta), a frazione in the comune of Algund (Lagundo) in South Tyrol, Italy In Switzerland * Forst, Switzerland, in the Canton of Bern People * David Forst (born 1976), American baseball executive * Grete Forst (1878–1942), Austrian soprano * Rainer Forst (born 1964), German philosopher *Willi Forst Willi Forst, born Wilhelm Anton Frohs (7 April 1903 – 11 August 19 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wessel Marais
Wessel Marais B.Sc., M.Sc. (1929-2013) was a South African botanist and plant collector. Wessel was born in Colesberg, Northern Cape Province, on 28 December 1929, the youngest of the ten children of Barend Pieter Marais, the last blacksmith and wagon builder of Colesberg, who was of French Huguenot descent. He studied at Pretoria University (1947-1951) where he obtained an M.Sc. in Botany for the thesis 'A Morphological study of an indigenous species of rice, ''Oryza barthii'' A. Chev.'. He then (1952) joined the National Herbarium (PRE) where he undertook fieldwork during an internship in Kruger National Park and in Namibia. From 1953 to 1955 he was director of the Albany Museum Herbarium (GRA) in Grahamstown, where he studied South African Cruciferae for the Flora of Southern Africa. He carried out collecting trips to the Southwestern Cape Province, Natal, Lesotho, the Transkei, Pondoland, Griqualand East and other localities. He collected over 1,500 specimens jointly with Va ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pentapetes Erythroxylon
''Trochetiopsis erythroxylon'', the Saint Helena redwood, is a species of plant, now extinct in the wild. It was formerly abundant enough in the upland parts of the island of Saint Helena for early settlers in the 17th century to use the timber to make their homes. It became extinct in the 1950's due to deforestation as its habitat was cleared to make way for pasture, timber and fuel. The St. Helena Redwood was used as an early example of ex situ conservation when the governor of St. Helena obtained a couple seedlings and planted them in his garden. It now exists in cultivation, although cultivated stock is weak. This species has pendant flowers, petals that turn pink with age, and white staminodes. Saint Helena redwood is completely unrelated to the redwood tree of California and other trees called redwood. It is, however, in the same genus as the Saint Helena ebony ('' Trochetiopsis ebenus'') and a hybrid between them (''Trochetiopsis × benjamini'') is now often planted ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saint Helena
Saint Helena () is a British overseas territory located in the South Atlantic Ocean. It is a remote volcanic tropical island west of the coast of south-western Africa, and east of Rio de Janeiro in South America. It is one of three constituent parts of the British Overseas Territory of Saint Helena, Ascension and Tristan da Cunha. Saint Helena measures about and has a population of 4,439 per the 2021 census. It was named after Helena, mother of Constantine I. It is one of the most remote islands in the world and was uninhabited when discovered by the Portuguese enroute to the Indian subcontinent in 1502. For about four centuries the island was an important stopover for ships from Europe to Asia and back, while sailing around the African continent, until the opening of the Suez canal. St Helena is the United Kingdom's second-oldest overseas territory after Bermuda. Saint Helena is known for being the site of Napoleon's second exile, following his final defeat in 1815. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Deforestation
Deforestation or forest clearance is the removal of a forest or stand of trees from land that is then converted to non-forest use. Deforestation can involve conversion of forest land to farms, ranches, or urban use. The most concentrated deforestation occurs in tropical rainforests. About 31% of Earth's land surface is covered by forests at present. This is one-third less than the forest cover before the expansion of agriculture, a half of that loss occurring in the last century. Between 15 million to 18 million hectares of forest, an area the size of Bangladesh, are destroyed every year. On average 2,400 trees are cut down each minute. The Food and Agriculture Organization of the United Nations defines deforestation as the conversion of forest to other land uses (regardless of whether it is human-induced). "Deforestation" and "forest area net change" are not the same: the latter is the sum of all forest losses (deforestation) and all forest gains (forest expansion) in a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sequoia Sempervirens
''Sequoia sempervirens'' ()''Sunset Western Garden Book,'' 1995:606–607 is the sole living species of the genus '' Sequoia'' in the cypress family Cupressaceae (formerly treated in Taxodiaceae). Common names include coast redwood, coastal redwood, and California redwood. It is an evergreen, long-lived, monoecious tree living 1,200–2,200 years or more. This species includes the tallest living trees on Earth, reaching up to in height (without the roots) and up to in diameter at breast height. These trees are also among the oldest living things on Earth. Before commercial logging and clearing began by the 1850s, this massive tree occurred naturally in an estimated along much of coastal California (excluding southern California where rainfall is not sufficient) and the southwestern corner of coastal Oregon within the United States. The name sequoia sometimes refers to the subfamily Sequoioideae, which includes ''S. sempervirens'' along with '' Sequoiadendron'' ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cupressaceae
Cupressaceae is a conifer family, the cypress family, with worldwide distribution. The family includes 27–30 genera (17 monotypic), which include the junipers and redwoods, with about 130–140 species in total. They are monoecious, subdioecious or (rarely) dioecious trees and shrubs up to tall. The bark of mature trees is commonly orange- to red- brown and of stringy texture, often flaking or peeling in vertical strips, but smooth, scaly or hard and square-cracked in some species. Description The leaves are arranged either spirally, in decussate pairs (opposite pairs, each pair at 90° to the previous pair) or in decussate whorls of three or four, depending on the genus. On young plants, the leaves are needle-like, becoming small and scale-like on mature plants of many genera; some genera and species retain needle-like leaves throughout their lives. Old leaves are mostly not shed individually, but in small sprays of foliage ( cladoptosis); exceptions are leaves on the sh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trochetiopsis Ebenus
''Trochetiopsis ebenus'', the dwarf ebony or Saint Helena ebony, is a species of flowering plant that is endemic to the island of Saint Helena in the southern Atlantic Ocean. It is not related to the ebony of commerce (''Diospyros'' spp.), but is instead a member of the mallow family, Malvaceae. Saint Helena ebony is now critically endangered in the wild, being reduced to two wild individuals on a cliff, but old roots are sometimes found washed out of eroding slopes (relicts of its former abundance). These are collected on the island a used for inlay work, an important craft on Saint Helena. A related species, '' Trochetiopsis melanoxylon'' is now completely extinct. It can be propagated from cuttings and many island gardens now boast a fine ebony bush. It is related to the Saint Helena redwood (''Trochetiopsis erythroxylon'') and a hybrid between them (''Trochetiopsis × benjamini'') is also now often planted. ''Trochetiopsis ebenus'' has staminodes that are dark maroon or "bl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flora Of St Helena
The flora of Saint Helena, an isolated island in the South Atlantic Ocean, is exceptional in its high level of endemism and the severe threats facing the survival of the flora. In phytogeography, it is in the phytochorion St. Helena and Ascension Region of the African Subkingdom, in the Paleotropical Kingdom. Endemic and introduced flora The endemic plants of Saint Helena include many notable Cabbage Tree or, "insular arborescent Asteraceae", members of the daisy family which have evolved a shrubby or tree-like habit on islands. Other notable endemics include the closely related St Helena redwood ('' Trochetiopsis erythroxylon'') and St Helena dwarf ebony ('' Trochetiopsis ebenus''). These are unrelated to the redwood trees of California or to the ebony trees of commerce, being instead in the Mallow family (Malvaceae). Vegetation Today there are three major vegetation zones: the tree-fern thicket of the highest parts of the central ridge; the pastures of middle elevations and t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.JPG "Click for more on -> Cupressaceae")
