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Metasequoia Glyptostroboides
''Metasequoia glyptostroboides'', the dawn redwood, is a fast-growing, endangered deciduous pinophyta, conifer. It is the sole living species of the genus ''Metasequoia'', one of three genera in the subfamily Sequoioideae of the family (botany), family Cupressaceae. It now survives in the wild only in wet lower slopes and Montane ecosystems, montane river and stream valleys in the border region of Hubei and Hunan provinces and Chongqing municipality in south-central China, notably in Lichuan, Hubei, Lichuan county in Hubei. Although the shortest of the redwoods, it can grow to in height. In 1941, the genus ''Metasequoia'' was reported by paleobotanist as a widely distributed extinct genus based on fossils, before attracting considerable attention a few years later when small populations were found alive in central China. It is a well-known example of a living fossil species. Modern dawn redwood appears identical to its late Cretaceous ancestors. The tree faces considerable risk ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hu Xiansu
Hu Xiansu or Hu Hsen-Hsu (, 24 May 1894 – 16 July 1968), courtesy name Buzeng (), was a Chinese botanist, scholar, literary critic and educator. He was the founder of plant taxonomy in China and a pioneer of modern botany and paleobotany research in the country. One of his most notable achievements as a botanist was the identification of the living fossil ''Metasequoia glyptostroboides'' (dawn redwood) in the 1940s, which was previously thought to have been extinct for over 150 million years. This has been considered by some in the scientific community as one of the greatest botanical discoveries of the 20th century. Outside botany, Hu also made significant contributions in the field of literary critique and education. In 1922, in opposition of the New Culture Movement that promoted vernacular literature, Hu co-founded '' The Critical Review'', a major Chinese-language journal which advocated the preservation of Chinese classical literature. From 1940 to 1944, Hu served as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Living Fossil
A living fossil is a Deprecation, deprecated term for an extant taxon that phenotypically resembles related species known only from the fossil record. To be considered a living fossil, the fossil species must be old relative to the time of origin of the extant clade. Living fossils commonly are of species-poor lineages, but they need not be. While the body plan of a living fossil remains superficially similar, it is never the same species as the remote relatives it resembles, because genetic drift would inevitably change its chromosomal structure. Living fossils exhibit punctuated equilibrium, stasis (also called "bradytely") over geologically long time scales. Popular literature may wrongly claim that a "living fossil" has undergone no significant evolution since fossil times, with practically no molecular evolution or Morphology (biology), morphological changes. Scientific investigations have repeatedly discredited such claims. The minimal superficial changes to living foss ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arnold Arboretum
The Arnold Arboretum is a botanical research institution and free public park affiliated with Harvard University and located in the Jamaica Plain and Roslindale, Massachusetts, Roslindale neighborhoods of Boston. Established in 1872, it is the oldest public arboretum in North America. The landscape was designed by Charles Sprague Sargent and Frederick Law Olmsted and is the second largest "link" in the Emerald Necklace. The Arnold Arboretum's collection of temperate trees, shrubs, and vines has an emphasis on the plants of the eastern North America and eastern Asia, where Arboretum staff and colleagues are sourcing new material on plant collecting expeditions. The Arboretum supports research in its landscape and in its Weld Hill Research Building. History The Arboretum was founded in 1872. It was established through land and financial gifts from Benjamin Bussey and James Arnold, with trustee George Barrell Emerson facilitating its creation. Harvard appointed Charles Sprague Sar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glyptostrobus
''Glyptostrobus'' is a small genus of conifers in the family Cupressaceae (formerly in the family Taxodiaceae). The sole living species, '' Glyptostrobus pensilis'', is native to subtropical southeastern China, from Fujian west to southeast Yunnan, and also very locally in northern Vietnam and Bolikhamsai province of eastern Laos near the Vietnam border. Fossil record The genus formerly had a much wider range, covering most of the Northern Hemisphere, including the high Arctic in the Paleocene and Eocene. The oldest known fossils are late Cretaceous in age, found in North America. It contributed greatly to the coal swamps of the Cenozoic era. It was reduced to its current range before and during the Pleistocene ice ages.LePage, B.A. 2007. The Taxonomy and Biogeographic History of ''Glyptostrobus''Bulletin of the Peabody Museum of Natural History, 48(2): 359-426 Description ''G. pensilis'' is a medium-sized to large tree, reaching tall and with a trunk diameter of up to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taxon (journal)
''Taxon'' is a bimonthly peer-reviewed scientific journal covering plant taxonomy. It is published by Wiley on behalf of the International Association for Plant Taxonomy, of which it is the official journal. It was established in 1952 and is the only place where nomenclature proposals and motions to amend the International Code of Nomenclature for algae, fungi, and plants (except for the rules concerning fungi A fungus (: fungi , , , or ; or funguses) is any member of the group of eukaryotic organisms that includes microorganisms such as yeasts and mold (fungus), molds, as well as the more familiar mushrooms. These organisms are classified as one ...) can be published. The editor-in-chief is Dirk C. Albach ( University of Oldenburg). Abstracting and indexing The journal is abstracted and indexed in: According to the '' Journal Citation Reports'', the journal has a 2020 impact factor of 2.817. References External links *{{Official website, https://onlinelibrary.w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kana
are syllabary, syllabaries used to write Japanese phonology, Japanese phonological units, Mora (linguistics), morae. In current usage, ''kana'' most commonly refers to ''hiragana'' and ''katakana''. It can also refer to their ancestor , which were Kanji, Chinese characters used phonetically to transcribe Japanese language, Japanese (e.g. ''man'yōgana''); and ''hentaigana'', which are historical variants of the now-standard hiragana. Katakana, with a few additions, are also used to write Ainu language, Ainu. A Okinawan scripts, number of systems exist to write the Ryūkyūan languages, in particular Okinawan language, Okinawan, in hiragana. Taiwanese kana were used in Taiwanese Hokkien as ruby text for Chinese characters in Taiwan when it was Taiwan under Japanese rule, under Japanese rule. Each syllabogram, kana character corresponds to one phoneme or syllable, unlike kanji, which generally each logogram, corresponds to a morpheme. Apart from the five vowels, it is always ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cryptomeria
''Cryptomeria'' (literally "hidden parts") is a monotypic genus of conifer in the cypress family Cupressaceae. It includes only one species, ''Cryptomeria japonica'' ( syn. ''Cupressus japonica'' L.f.). It is considered to be endemic to Japan, where it is known as . The tree is also called Japanese cedar or Japanese redwood in English. It has been extensively introduced, and cultivated for wood production on the Azores and elsewhere. Description ''Cryptomeria'' is a very large evergreen tree, reaching up to tall and trunk diameter, with red-brown bark which peels in vertical strips. The leaves are arranged spirally, needle-like, long; and the seed cones globular, diameter with about 20–40 scales. It is superficially similar to the related giant sequoia (''Sequoiadendron giganteum''), from which it can be differentiated by the longer leaves (under in the giant sequoia) and smaller cones ( in the giant sequoia), and the harder bark on the trunk (thick, soft and spong ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kanji
are logographic Chinese characters, adapted from Chinese family of scripts, Chinese script, used in the writing of Japanese language, Japanese. They were made a major part of the Japanese writing system during the time of Old Japanese and are still used, along with the subsequently-derived Syllabary, syllabic scripts of and . The characters have Japanese pronunciations; most have two, with one based on the Chinese sound. A few characters were invented in Japan by constructing character components derived from other Chinese characters. After the Meiji Restoration, Japan made its own efforts to simplify the characters, now known as , by a process similar to China's simplified Chinese characters, simplification efforts, with the intention to increase literacy among the general public. Since the 1920s, the Japanese government has published character lists periodically to help direct the education of its citizenry through the myriad Chinese characters that exist. There are nearly 3 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hanzi
Chinese characters are logographs used to write the Chinese languages and others from regions historically influenced by Chinese culture. Of the four independently invented writing systems accepted by scholars, they represent the only one that has remained in continuous use. Over a documented history spanning more than three millennia, the function, style, and means of writing characters have changed greatly. Unlike letters in alphabets that reflect the sounds of speech, Chinese characters generally represent morphemes, the units of meaning in a language. Writing all of the frequently used vocabulary in a language requires roughly 2000–3000 characters; , nearly have been identified and included in ''The Unicode Standard''. Characters are created according to several principles, where aspects of shape and pronunciation may be used to indicate the character's meaning. The first attested characters are oracle bone inscriptions made during the 13th century BCE in what ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kyoto University
, or , is a National university, national research university in Kyoto, Japan. Founded in 1897, it is one of the former Imperial Universities and the second oldest university in Japan. The university has ten undergraduate faculties, eighteen graduate schools, and thirteen research institutes. The university's educational and research activities are centred in its three main campuses in Kyoto: Yoshida, Uji and Katsura. The Kyoto University Library Network, consisting of more than 40 libraries spread across its campuses, has a collection of more than 7.49 million books, making it the second largest university library in the country. In addition to these campuses, the university owns facilities and lands for educational and research purposes around the country. As of 2024, Kyoto University counts List of prime ministers of Japan by education, two prime ministers of Japan amongst its alumni. Additionally, three prime ministers of Japan attended the Third Higher School, a university p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cupressaceae
Cupressaceae or the cypress family is a family of conifers. 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. The family reached its peak of diversity during the Mesozoic era. 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 ( clad ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mesozoic Era
The Mesozoic Era is the era of Earth's geological history, lasting from about , comprising the Triassic, Jurassic and Cretaceous Periods. It is characterized by the dominance of archosaurian reptiles such as the dinosaurs, and of gymnosperms such as cycads, ginkgoaceae and araucarian conifers; a hot greenhouse climate; and the tectonic break-up of Pangaea. The Mesozoic is the middle of the three eras since complex life evolved: the Paleozoic, the Mesozoic, and the Cenozoic. The era began in the wake of the Permian–Triassic extinction event, the largest mass extinction in Earth's history, and ended with the Cretaceous–Paleogene extinction event, another mass extinction whose victims included the non-avian dinosaurs, pterosaurs, mosasaurs, and plesiosaurs. The Mesozoic was a time of significant tectonic, climatic, and evolutionary activity. The supercontinent Pangaea began to break apart into separate landmasses. The climate of the Mesozoic was varied, alternating bet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
