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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] |
Trochetiopsis × Benjaminii
The flowering plant genus ''Trochetiopsis'' consists of two extant and one extinct species Endemic (ecology), endemic to the island of Saint Helena (South Atlantic Ocean). They were formerly placed in the family (biology), family Sterculiaceae, but this is included in the expanded Malvaceae in the Angiosperm Phylogeny Group, 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 i ... [...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] |
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] |
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] |
Trochetiopsis Melanoxylon
''Trochetiopsis melanoxylon'', the dwarf ebony or St Helena ebony, of the island of Saint Helena is related to ''Trochetiopsis ebenus'' but is now extinct. It differed from ''T. ebenus'' by having much smaller flowers, sepals hairless on their interior surfaces and leaves densely hairy on both surfaces (''T. ebenus'' is densely hairy only on the lower surfaces of the leaves). It was last seen when it was collected by Banks and Solander in 1771 on Cook's first voyage. It may once have covered many of the driest slopes of Saint Helena, but appears to have been one of the first casualties of the introduction of the domestic goat by the Portuguese sailors soon after the discovery of Saint Helena in 1502. See also *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 R ... ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trochetia
''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 m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Melhania
''Melhania'' is a genus of small shrubs or herbaceous plants. Traditionally included in the family Sterculiaceae, it is included in the expanded Malvaceae in the APG and most subsequent systematics. The genus is named for Mount Melhan in Yemen. The following species are recognised by ''Plants of the World Online'' (POWO): *'' Melhania acuminata'' Mast. *'' Melhania albiflora'' (Hiern) Exell & Mendonça *'' Melhania ambovombeensis'' Arènes *'' Melhania andrahomanensis'' Arènes *'' Melhania angustifolia'' K.Schum. *'' Melhania annua'' Thulin *'' Melhania apiculata'' Baker f. *''Melhania beguinotii'' Cufod. *'' Melhania brachycarpa'' Domin *''Melhania burchellii'' DC. *'' Melhania cannabina'' Wight ex Mast. *''Melhania carrissoi'' Exell & Mendonça *''Melhania corchoriflora'' Baill. *''Melhania coriacea'' Chiov. *''Melhania damarana'' Harv. *''Melhania decaryana'' Arènes *''Melhania dehnhardtii'' K.Schum. *''Melhania denhamii'' R.Br. *''Melhania didyma'' Eckl. & Zeyh. *''Melhani ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sterculiaceae
Sterculiaceae was a family of flowering plant based on the genus ''Sterculia''. Genera formerly included in Sterculiaceae are now placed in the family Malvaceae, in the subfamilies: Byttnerioideae, Dombeyoideae, Helicteroideae and Sterculioideae. As traditionally circumscribed the Sterculiaceae, Malvaceae, Bombacaceae, and Tiliaceae comprise the "core Malvales" of the Cronquist system and the close relationship among these families is generally recognized. Sterculiaceae may be separated from Malvaceae ''sensu stricto'' by the smooth surface of the pollen grains and the bilocular anthers. Numerous phylogenetic studies have revealed that Sterculiaceae, Tiliaceae and Bombacaceae as traditionally defined are cladistically polyphyletic. The APG and APG II systems unite Bombacaceae, Malvaceae ''sensu stricto'', Sterculiaceae and Tiliaceae into a more widely circumscribed Malvaceae, i.e., Malvaceae ''sensu lato''. In that view the taxa formerly classified in Sterculiaceae are treated in t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paramelhania
''Paramelhania'' is a genus of flowering plants belonging to the family Malvaceae Malvaceae, or the mallows, is a family of flowering plants estimated to contain 244 genera with 4225 known species. Well-known members of economic importance include okra, cotton, cacao and durian. There are also some genera containing familiar .... Its native range is Madagascar. Species Species: * ''Paramelhania decaryana'' Arènes References {{Taxonbar, from=Q9055416 Dombeyoideae Malvaceae genera Endemic flora of Madagascar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fossil
A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved in amber, hair, petrified wood and DNA remnants. The totality of fossils is known as the ''fossil record''. Paleontology is the study of fossils: their age, method of formation, and evolutionary significance. Specimens are usually considered to be fossils if they are over 10,000 years old. The oldest fossils are around 3.48 billion years old to 4.1 billion years old. Early edition, published online before print. The observation in the 19th century that certain fossils were associated with certain rock strata led to the recognition of a geological timescale and the relative ages of different fossils. The development of radiometric dating techniques in the early 20th century allowed scientists to quantitatively measure the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wood
Wood is a porous and fibrous structural tissue found in the stems and roots of trees and other woody plants. It is an organic materiala natural composite of cellulose fibers that are strong in tension and embedded in a matrix of lignin that resists compression. Wood is sometimes defined as only the secondary xylem in the stems of trees, or it is defined more broadly to include the same type of tissue elsewhere such as in the roots of trees or shrubs. In a living tree it performs a support function, enabling woody plants to grow large or to stand up by themselves. It also conveys water and nutrients between the leaves, other growing tissues, and the roots. Wood may also refer to other plant materials with comparable properties, and to material engineered from wood, or woodchips or fiber. Wood has been used for thousands of years for fuel, as a construction material, for making tools and weapons, furniture and paper. More recently it emerged as a feedstock for the productio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sepals
A sepal () is a part of the flower of angiosperms (flowering plants). Usually green, sepals typically function as protection for the flower in bud, and often as support for the petals when in bloom., p. 106 The term ''sepalum'' was coined by Noël Martin Joseph de Necker in 1790, and derived . Collectively the sepals are called the calyx (plural calyces), the outermost whorl of parts that form a flower. The word ''calyx'' was adopted from the Latin ,Jackson, Benjamin, Daydon; A Glossary of Botanic Terms with their Derivation and Accent; Published by Gerald Duckworth & Co. London, 4th ed 1928 not to be confused with 'cup, goblet'. ''Calyx'' is derived from Greek 'bud, calyx, husk, wrapping' ( Sanskrit 'bud'), while is derived from Greek 'cup, goblet', and the words have been used interchangeably in botanical Latin. After flowering, most plants have no more use for the calyx which withers or becomes vestigial. Some plants retain a thorny calyx, either dried or live, as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
