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Winteraceae
Winteraceae is a primitive family of tropical trees and shrubs including 93 species in five genera. It is of particular interest because it is such a primitive angiosperm family, distantly related to Magnoliaceae, though it has a much more southern distribution. Plants in this family grow mostly in the southern hemisphere, and have been found in tropical to temperate climate regions of Malesia, Oceania, eastern Australia, New Zealand, Madagascar and the Neotropics, with most of the genera concentrated in Australasia and Malesia. The five genera, ''Takhtajania'', ''Tasmannia'', ''Drimys'', ''Pseudowintera'', and ''Zygogynum'' s.l. all have distinct geographic extant populations. '' Takhtajania'' includes a single species, ''T. perrieri'', endemic only to Madagascar, '' Tasmannia'' has the largest distribution of genera in Winteraceae with species across the Philippines, Borneo, New Guinea, Eastern Australia, and Tasmania, '' Drimys'' is found in the Neotropical realm, from sou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pseudowintera
''Pseudowintera'', commonly known as horopito, is a genus of woody evergreen flowering trees and shrubs, part of family Winteraceae. The species of ''Pseudowintera'' are native to New Zealand. Winteraceae are magnoliids, associated with the humid Antarctic flora of the southern hemisphere. Horopito can be chewed for a hot, peppery taste. Species *'' Pseudowintera axillaris'', is known as the lowland horopito. It is a shrub or small tree growing up to eight metres tall in lowland and lower montane forests from 35° to 42° South. In the South Island it grows West of the Main Divide. *'' Pseudowintera colorata'', or mountain horopito, is an evergreen shrub or small tree (1–2.5 m) commonly called pepperwood because its leaves have a very hot bite. Its yellow and green leaves are blotched with red; new leaves in the spring are bright red. It is widespread throughout New Zealand, from lowland forests to higher montane forests, and from 36° 30' South as far southwards as Stewart Is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zygogynum
''Zygogynum'' is a genus of plants in the family Winteraceae with 47 species . They are native to areas from Borneo through New Guinea and Queensland to New Caledonia, with 22 species in New Guinea. Initially, the genus was thought to be endemic to New Caledonia, but in 1985 Willem Vink transferred the related genera ''Bubbia'' and ''Exospermum'' to ''Zygogynum'', thus extending the range westward. More recently, new species have been identified and described which again extends the range of the genus such that it now includes Borneo. Description Plants in this genus are evergreen shrubs or small trees, leaves are alternate, undivided, and hairless; they may have a peppery taste. Inflorescences are terminal and have 1–150 flowers. Petals number from 4 to 30, stamens from 3 to 370, carpels from 1 to 50. Distribution and habitat The genus occurs in Borneo, the Maluku Islands, New Guinea, the Bismarck Archipelago, Solomon Islands, Norfolk Island, and the Australian state of Queens ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Takhtajania
''Takhtajania'' is a genus of flowering plants of the family Winteraceae, which contains a single species, ''Takhtajania perrieri''. It is endemic to Madagascar. ''Takhtajania'' is found in a small area of the Madagascar subhumid forests. It is a small evergreen tree or shrub, with shiny green lance-shaped leaves and reddish-pink flowers. The first known specimen of the plant was collected in 1909 on the Manongarivo Massif of central Madagascar at an elevation of 1700 meters. In 1963, the French botanist René Paul Raymond Capuron examined the unidentified plant sample, which he identified as a new species, which he named ''Bubbia perrieri'', after the French botanist Henri Perrier de la Bâthie, classifying it in the Australasian Winteraceae genus '' Bubbia''. In 1978, the botanists Baranova and J. F. Leroy reclassified the plant into its own genus, ''Takhtajania'', after the Russian botanist Armen Takhtajan Armen Leonovich Takhtajan or Takhtajian (; surname also transl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Drimys
''Drimys'' is a genus of seven species of woody evergreen flowering plants, in the family Winteraceae. The species are native to the Neotropics, ranging from southern Mexico to the southern tip of South America.''Drimys'' J.R.Forst. & G.Forst. ''Plants of the World Online'', Kew Science. Accessed 24 April 2022. They are primitive s, associated with the humid temperate of the Southern Hemisphere, which evolved millions of years ago on the ancient supercontinent of |
Tasmannia
''Tasmannia'' is a genus of about 36 species of flowering plants in the family Winteraceae, and is native to Australia and New Guinea, with one species ('' Tasmannia piperita'') also found in parts of Southeast Asia. Plants in the genus ''Tasmannia'' are shrubs or small trees, usually dioecious with simple leaves, mostly white, sometimes yellow flowers, and one to many clusters of berries. Description Plants in the genus ''Tasmannia'' are shrubs or small trees that are usually dioecious, with simple, aromatic leaves arranged alternately along the branchlets, and have fine oil dots. There are no stipules. The flowers are usually white, sometimes yellow and arranged singly in the axils of bud scales, appearing like an umbel, later becoming like a whorl. The sepals are joined together, completely enclosing the flower bud, later splitting into lobes. The fruit is a berry arranged singly or in clusters of up to 6. Taxonomy The genus ''Tasmannia'' was first formally described by pub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vessel Element
A vessel element or vessel member (also called a xylem vessel) is one of the cell types found in xylem, the water conducting tissue of plants. Vessel elements are found in most angiosperms (flowering plants) and in some gymnosperms such as cycads and ''Ephedra (plant), Ephedra'', but absent in conifers. Vessel elements are the main feature distinguishing the "hardwood" of angiosperms from the "softwood" of conifers. Anatomy Xylem is the tissue in vascular plants that conducts water (and substances dissolved in it) upwards from the roots to the shoots. Two kinds of cell are involved in xylem transport: tracheids and vessel elements. Vessel elements are the building blocks of vessels, the conducting pathways that constitute the major part of the water transporting system in flowering plants. Vessels form an efficient system for transporting water (including necessary minerals) from the root to the leaves and other parts of the plant. In secondary xylem – the xylem that is prod ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Africa
Africa is the world's second-largest and second-most populous continent after Asia. At about 30.3 million km2 (11.7 million square miles) including adjacent islands, it covers 20% of Earth's land area and 6% of its total surface area.Sayre, April Pulley (1999), ''Africa'', Twenty-First Century Books. . With nearly billion people as of , it accounts for about of the world's human population. Demographics of Africa, Africa's population is the youngest among all the continents; the median age in 2012 was 19.7, when the worldwide median age was 30.4. Based on 2024 projections, Africa's population will exceed 3.8 billion people by 2100. Africa is the least wealthy inhabited continent per capita and second-least wealthy by total wealth, ahead of Oceania. Scholars have attributed this to different factors including Geography of Africa, geography, Climate of Africa, climate, corruption, Scramble for Africa, colonialism, the Cold War, and neocolonialism. Despite this lo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Israel
Israel, officially the State of Israel, is a country in West Asia. It Borders of Israel, shares borders with Lebanon to the north, Syria to the north-east, Jordan to the east, Egypt to the south-west, and the Mediterranean Sea to the west. Israeli-occupied territories, It occupies the Occupied Palestinian territories, Palestinian territories of the West Bank in the east and the Gaza Strip in the south-west. Israel also has a small coastline on the Red Sea at its southernmost point, and part of the Dead Sea lies along its eastern border. Status of Jerusalem, Its proclaimed capital is Jerusalem, while Tel Aviv is the country's Gush Dan, largest urban area and Economy of Israel, economic center. Israel is located in a region known as the Land of Israel, synonymous with the Palestine (region), Palestine region, the Holy Land, and Canaan. In antiquity, it was home to the Canaanite civilisation followed by the History of ancient Israel and Judah, kingdoms of Israel and Judah. Situate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paleocene
The Paleocene ( ), or Palaeocene, is a geological epoch (geology), epoch that lasted from about 66 to 56 mya (unit), million years ago (mya). It is the first epoch of the Paleogene Period (geology), Period in the modern Cenozoic Era (geology), Era. The name is a combination of the Ancient Greek ''palaiós'' meaning "old" and the Eocene Epoch (which succeeds the Paleocene), translating to "the old part of the Eocene". The epoch is bracketed by two major events in Earth's history. The K–Pg extinction event, brought on by an asteroid impact (Chicxulub impact) and possibly volcanism (Deccan Traps), marked the beginning of the Paleocene and killed off 75% of species, most famously the non-avian dinosaurs. The end of the epoch was marked by the Paleocene–Eocene Thermal Maximum (PETM), which was a major climatic event wherein about 2,500–4,500 gigatons of carbon were released into the atmosphere and ocean systems, causing a spike in global temperatures and ocean acidification. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Danian
The Danian is the oldest age or lowest stage of the Paleocene Epoch or Series, of the Paleogene Period or System, and of the Cenozoic Era or Erathem. The beginning of the Danian (and the end of the preceding Maastrichtian) is at the Cretaceous–Paleogene extinction event . The age ended , being followed by the Selandian. Stratigraphic definitions The Danian was introduced in scientific literature by German-Swiss geologist Pierre Jean Édouard Desor in 1847 following a study of fossils found in France and Denmark.Danien Den Store Danske Encyklopædi He identified this stage in deposits from [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Albian
The Albian is both an age (geology), age of the geologic timescale and a stage (stratigraphy), stage in the stratigraphic column. It is the youngest or uppermost subdivision of the Early Cretaceous, Early/Lower Cretaceous epoch (geology), Epoch/series (stratigraphy), Series. Its approximate time range is 113.0 ± 1.0 annum, Ma to 100.5 ± 0.9 Ma (million years ago). The Albian is preceded by the Aptian and followed by the Cenomanian. Stratigraphic definitions The Albian Stage was first proposed in 1842 by Alcide d'Orbigny. It was named after Alba, the Latin name for Aube (river), River Aube in France. A Global Boundary Stratotype Section and Point (GSSP), ratified by the IUGS in 2016, defines the base of the Albian as the first occurrence of the planktonic foraminiferan ''Hedbergellidae, Microhedbergella renilaevis'' at the Col de Pré-Guittard section, Arnayon, Drôme, France. The top of the Albian Stage (the base of the Cenomanian Stage and Upper Cretaceous Series) is defined ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
