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Agathis
''Agathis'', commonly known as kauri or dammara, is a genus of evergreen coniferous trees, native to Australasia and Southeast Asia. It is one of three extant genera in the family Araucariaceae, alongside ''Wollemia'' and ''Araucaria'' (being more closely related to the former).de Laubenfels, David J. 1988. Coniferales. P. 337–453 in Flora Malesiana, Series I, Volume 10. Dordrecht: Kluwer Academic. Its leaves are much broader than most conifers. Kauri gum is commercially harvested from New Zealand kauri. Description Mature kauri trees have characteristically large trunks, with little or no branching below the crown. In contrast, young trees are normally conical in shape, forming a more rounded or irregularly shaped crown as they achieve maturity.Whitmore, T.C. 1977. ''A first look at Agathis''. Tropical Forestry Papers No. 11. University of Oxford Commonwealth Forestry Institute. The bark is smooth and light grey to grey-brown, usually peeling into irregular flakes tha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Agathis Robusta
''Agathis robusta'', commonly known as Queensland kauri (pine), kauri pine or smooth-barked kauri, is a coniferous tree in the family Araucariaceae. It has a disjunct distribution, occurring in Papua New Guinea and in two widely separated locations in Queensland, Australia. It was first described in 1859 and was heavily logged in the mid-19th century. It is not a true pine (family Pinaceae), but Araucariaceae and Pinaceae are both conifer families in the class Pinopsida. Description ''Agathis robusta'' is a large evergreen tree with a straight cylindrical trunk, which can often reach a height of , and occasionally . The trunk is usually about diameter at breast height (DBH), but occasionally may reach . The bark is orange-brown to grey-brown, smooth, but shedding in large flakes. The linear- elliptic leaves are up to long and wide, with numerous fine parallel veins and no midrib. They are carried on petioles measuring and are arranged in opposite pairs (rarely whorls of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Araucariaceae
Araucariaceae is a Family (biology), family of conifers with three living Genus, genera, ''Araucaria'', ''Agathis'', and ''Wollemia''. While the family's native distribution is now largely confined to the Southern Hemisphere, except for a few species of ''Agathis'' in Malesia, it was formerly widespread in the Northern Hemisphere during the Jurassic and Cretaceous periods. Description Members of Araucariaceae are typically extremely tall evergreen trees, reaching heights of or more. They can also grow very large stem diameters; a New Zealand kauri tree (''Agathis australis'') named ''Tāne Mahuta'' ("The Lord of the Forest") has been measured at tall with a diameter at breast height of . Its total wood volume is calculated to be , making it the third-largest conifer after ''Sequoia sempervirens, Sequoia'' and ''Sequoiadendron'' (both from the Cupressaceae subfamily Sequoioideae). The trunks are columnar and have relatively large piths with resinous Cortex (botany), cortices. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Agathis Loranthifolia
''Agathis dammara'', commonly known as the Amboina pine or dammar pine, is a coniferous timber tree native to Sulawesi, the Maluku Islands and the Philippines. Description ''Agathis dammara'' is a medium-large conifer up to tall and dmh found in lowland to upland tropical rainforests as well as lowland to lower montane rainforests. It belongs to the family Araucariaceae, widespread throughout the Jurassic, Cretacic and Paleogene periods and emerging in the Early Jurassic (around 201 Ma), but now confined to the southern hemisphere. Mature specimens are described as long clear boles with an emergent crown of first-order branches. The bark has been described to be of various gray tones and covered with resin blisters. The leaves have been described to be thick and highly variable in color in every tree. This tree is a source of dammar gum, also known as cat-eye resin, and is also used as timber. Taxonomy When first discovered and listed as a species it was placed in the genus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New Zealand Kauri
''Agathis australis'', commonly known as kauri, is a species of coniferous tree in the family Araucariaceae, found north of 38°S in the northern regions of New Zealand's North Island. It is the largest (by volume) but not tallest species of tree in New Zealand, standing up to tall in the emergent layer above the forest's main canopy. The tree has smooth bark and small narrow leaves. Other common names to distinguish ''A. australis'' from other members of ''Agathis'' are southern kauri and New Zealand kauri. With its podsolization capability and regeneration pattern it can compete with faster growing angiosperms. Because it is such a conspicuous species, forest containing kauri is generally known as kauri forest, although kauri need not be the most abundant tree. In the warmer northern climate, kauri forests have a higher species richness than those found further south. Kauri even act as a foundation species that modify the soil under their canopy to create unique plant co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wollemia
''Wollemia'' is a genus of coniferous trees in the family Araucariaceae, endemic to Australia. It represents one of only three living genera in the family, alongside ''Araucaria'' and ''Agathis'' (being more closely related to the latter). The genus has only a single known species, ''Wollemia nobilis,'' commonly known as the Wollemi pine (though it is not a true pine) which was discovered in 1994 in a temperate rainforest wilderness area of the Wollemi National Park in New South Wales. It was growing in a remote series of narrow, steep-sided, sandstone gorges north-west of Sydney. The genus is named after the National Park. The Wollemi pine is classified as critically endangered (CR) on the International Union for Conservation of Nature, IUCN's IUCN Red List, Red List, and is legally protected in Australia. After it was discovered that the trees could be successfully cloned, new trees were potted up in the Botanic Gardens of Sydney and Australian Botanic Garden Mount Annan, Moun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Agathiphaga
''Agathiphaga'' is a genus of moths, known as kauri moths, and is the only living genus in the family Agathiphagidae. This caddisfly-like lineage of primitive moths was first reported by Lionel Jack Dumbleton in 1952, as a new genus of Micropterigidae. The caterpillars feed only on "kauri" (''Agathis'') and are currently considered the second most primitive living lineage of moths after Micropterigoidea. The larvae have been reported to be able to survive for 12 years in diapause, durability possibly a prerequisite to its possible dispersion around the Pacific islands in the seeds of ''Agathis''. Dumbleton described two species. '' Agathiphaga queenslandensis'' is found along the north-eastern coast of Queensland, Australia, and its larvae feed on ''Agathis robusta''. '' Agathiphaga vitiensis'' is found from Fiji to Vanuatu and the Solomon Islands, and its larvae feed on '' Agathis vitiensis''. A fossil member of Agathiphagidae, '' Agathiphagama,'' is known from the Burmese ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Salamanca Formation
The Salamanca Formation is a geologic formation in the Golfo San Jorge Basin of central Patagonia that yields well-preserved, well-dated fossils from the early Paleocene. Studies of these fossils are providing new data on plant and animal diversity following the Cretaceous–Paleogene extinction event, end-Cretaceous extinction event. Material was copied from this source, which is available under a creativecommons:by/4.0/, Creative Commons Attribution 4.0 International License The Salamanca Formation crops out in the San Jorge Basin in southern Chubut and northern Santa Cruz provinces, Argentina, overlying the Cretaceous Chubut Group and is part of the Paleocene and Eocene Río Chico Group. The formation yields abundant plant remains as well as fossils of invertebrates, marine macrofaunas, reptiles, and mammals. The formation consists primarily of estuarine to shallow marine deposits. Palynological analysis of the Salamanca Formation shows low floral diversity after the end-Creta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Araucaria
''Araucaria'' (; original pronunciation: [a.ɾawˈka. ɾja]) is a genus of evergreen coniferous trees in the family Araucariaceae. While today they are largely confined to the Southern Hemisphere, during the Jurassic and Cretaceous they were globally distributed. There are 20 extant taxon, extant species in New Caledonia (where 14 species are endemism, endemic, see New Caledonian Araucaria, New Caledonian ''Araucaria''), eastern Australia (including Norfolk Island), New Guinea, Argentina, Brazil, Chile and Uruguay. The genus is familiar to many people as the genus of the distinctive Chilean pine or monkey-puzzle tree (''Araucaria araucana''). No distinct vernacular name exists for the genus. Many are called "pine", although they are only distantly related to true pines, in the genus ''Pinus''. Description ''Araucaria'' are mainly large trees with a massive erect stem, reaching a height of . The horizontal, spreading branches grow in whorls and are covered with leather ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kauri Gum
Kauri gum is resin from kauri trees (''Agathis australis''), which historically had several important industrial uses. It can also be used to make crafts such as jewellery. Kauri forests once covered much of the North Island of New Zealand, before early settlers caused the forests to retreat, causing several areas to revert to weeds, scrubs, and swamps. Even afterwards, ancient kauri fields and the remaining forests continued to provide a source for the gum.Hayward, pp 4–5 Between 1820 and 1900, over 90% of Kauri forests were logged or burnt by Europeans. Kauri gum forms when resin from kauri trees leaks out through fractures or cracks in the bark, hardening upon exposure to air. Lumps commonly fall to the ground and can be covered with soil and forest litter, eventually fossilising. Other lumps form as branches forked or trees are damaged, releasing the resin.Hayward, p 2 Uses The Māori had many uses for the gum, which they called ''kapia''. Fresh gum was used as a typ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Go Equipment
Go equipment refers to the board, stones (playing pieces), and bowls for the stones required to play the game of Go (game), Go. The quality and materials used in making Go equipment varies considerably, and the cost varies accordingly from economical to extremely expensive. History The oldest known surviving Go equipment is a board carved from rock that dates from the Han dynasty in China. Other examples of ancient equipment can be found in museums in Japan and Korea. Equipment Board The Go board, called the ''goban'' in Japanese language, Japanese, is the playing surface on which to place the stones. The standard board is marked with a 19×19 grid. Smaller boards include a 13×13 grid and a 9×9 grid used for shorter games that are often used to teach beginners. Some 19×19 boards have a 13×13 grid on the reverse side. 17×17 was used in historical times. Chinese boards are generally square; Japanese and Korean boards are slightly longer than wide, so that they for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aptian
The Aptian is an age (geology), age in the geologic timescale or a stage (stratigraphy), stage in the stratigraphic column. It is a subdivision of the Early Cretaceous, Early or Lower Cretaceous epoch (geology), Epoch or series (stratigraphy), Series and encompasses the time from 121.4 ± 1.0 annum, Ma to 113.0 ± 1.0 Ma (million years ago), approximately. The Aptian succeeds the Barremian and precedes the Albian, all part of the Lower/Early Cretaceous. The Aptian partly overlaps the upper part of the Western Europe, Western European Urgonian Stage. The Selli Event, also known as OAE1a, was one of two oceanic anoxic events in the Cretaceous Period, which occurred around 120 annum, Ma and lasted approximately 1 to 1.3 million years, being marked by enhanced silicate weathering, as well as ocean acidification. The Aptian extinction was a minor extinction event hypothesized to have occurred around 116 to 117 Ma. Stratigraphic definitions The Aptian was named after the small city o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
