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Cycas Elephantipes
''Cycas elephantipes'' is a species of cycad. It is found only on a few high sandstone mesas in Nong Bua Rawe District, Chaiyaphum Province, northeastern Thailand. It is morphologically similar to '' Cycas pachypoda'' from southern Vietnam Southern Vietnam ( vi, Nam Bộ) is one of the three geographical regions of Vietnam, the other two being Northern and Central Vietnam. It includes 2 administrative regions, which in turn are divided into 19 ''First Tier units'', of which 17 a ....Whitelock, Loran M. 2002. ''The Cycads''. Portland: Timber Press. References elephantipes Endemic flora of Thailand {{cycad-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cycad
Cycads are seed plants that typically have a stout and woody (ligneous) trunk (botany), trunk with a crown (botany), crown of large, hard, stiff, evergreen and (usually) pinnate leaves. The species are dioecious, that is, individual plants of a species are either male or female. Cycads vary in size from having trunks only a few centimeters to several meters tall. They typically grow very slowly and live very long. Because of their superficial resemblance, they are sometimes mistaken for Arecaceae, palms or ferns, but they are not closely related to either group. Cycads are gymnosperms (naked-seeded), meaning their fertilization, unfertilized seeds are open to the air to be directly fertilized by pollination, as contrasted with angiosperms, which have enclosed seeds with more complex fertilization arrangements. Cycads have very specialized pollinators, usually a specific species of beetle. Both male and female cycads bear cones (strobilus, strobili), somewhat similar to conife ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sandstone
Sandstone is a clastic sedimentary rock composed mainly of sand-sized (0.0625 to 2 mm) silicate grains. Sandstones comprise about 20–25% of all sedimentary rocks. Most sandstone is composed of quartz or feldspar (both silicates) because they are the most resistant minerals to weathering processes at the Earth's surface. Like uncemented sand, sandstone may be any color due to impurities within the minerals, but the most common colors are tan, brown, yellow, red, grey, pink, white, and black. Since sandstone beds often form highly visible cliffs and other topographic features, certain colors of sandstone have been strongly identified with certain regions. Rock formations that are primarily composed of sandstone usually allow the percolation of water and other fluids and are porous enough to store large quantities, making them valuable aquifers and petroleum reservoirs. Quartz-bearing sandstone can be changed into quartzite through metamorphism, usually related to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mesa
A mesa is an isolated, flat-topped elevation, ridge or hill, which is bounded from all sides by steep escarpments and stands distinctly above a surrounding plain. Mesas characteristically consist of flat-lying soft sedimentary rocks capped by a more resistant layer or layers of harder rock, e.g. shales overlain by sandstones. The resistant layer acts as a caprock that forms the flat summit of a mesa. The caprock can consist of either sedimentary rocks such as sandstone and limestone; dissected lava flows; or a deeply eroded duricrust. Unlike ''plateau'', whose usage does not imply horizontal layers of bedrock, e.g. Tibetan Plateau, the term ''mesa'' applies exclusively to the landforms built of flat-lying strata. Instead, flat-topped plateaus are specifically known as '' tablelands''.Duszyński, F., Migoń, P. and Strzelecki, M.C., 2019. ''Escarpment retreat in sedimentary tablelands and cuesta landscapes–Landforms, mechanisms and patterns.'' ''Earth-Science Reviews, no. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chaiyaphum Province
Chaiyaphum ( th, ชัยภูมิ, ) is one of Thailand's seventy-six provinces (''changwat''), located in central northeastern Thailand , also called Isan. Neighboring provinces are (from north clockwise) Khon Kaen, Nakhon Ratchasima, Lopburi, and Phetchabun. Toponymy The word ''chaiya'' originates from the Sanskrit word ''jaya'' meaning 'victory', and the word ''phum'' from Sanskrit ''bhumi'' meaning 'earth' or 'land'. Hence the name of the province literally means 'land of victory'. The Malay/Indonesian/Sanskrit word ''jayabumi'' is equivalent. Geography The province is bisected by the Phetchabun mountain range, with the highest elevation in the province at 1,222 m. The east of the province is part of the Khorat Plateau. The total forest area is or 31.4 percent of provincial area. Tat Ton National Park is in the northwest, featuring some scenic waterfalls and dry dipterocarp forests. The biggest attraction of the Sai Thong National Park in the west is the Sai Thong ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thailand
Thailand ( ), historically known as Siam () and officially the Kingdom of Thailand, is a country in Southeast Asia, located at the centre of the Indochinese Peninsula, spanning , with a population of almost 70 million. The country is bordered to the north by Myanmar and Laos, to the east by Laos and Cambodia, to the south by the Gulf of Thailand and Malaysia, and to the west by the Andaman Sea and the extremity of Myanmar. Thailand also shares maritime borders with Vietnam to the southeast, and Indonesia and India to the southwest. Bangkok is the nation's capital and largest city. Tai peoples migrated from southwestern China to mainland Southeast Asia from the 11th century. Indianised kingdoms such as the Mon, Khmer Empire and Malay states ruled the region, competing with Thai states such as the Kingdoms of Ngoenyang, Sukhothai, Lan Na and Ayutthaya, which also rivalled each other. European contact began in 1511 with a Portuguese diplomatic mission to Ayutthaya, w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cycas Pachypoda
''Cycas pachypoda'' is a species of cycad endemic to Vietnam Vietnam or Viet Nam ( vi, Việt Nam, ), officially the Socialist Republic of Vietnam,., group="n" is a country in Southeast Asia, at the eastern edge of mainland Southeast Asia, with an area of and population of 96 million, making i .... It is found in Binh Thuan, Ninh Thuan, and possibly Dong Nai provinces, southern Vietnam. References pachypoda Endemic flora of Vietnam {{cycad-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Southern Vietnam
Southern Vietnam ( vi, Nam Bộ) is one of the three geographical regions of Vietnam, the other two being Northern and Central Vietnam. It includes 2 administrative regions, which in turn are divided into 19 ''First Tier units'', of which 17 are provinces and 2 are municipalities. In a sub-context, "Southern Vietnam" may include part of Central Vietnam. Known as ''Nam Bộ'' today in Vietnamese, it was historically called as '' Gia Định'' (1779–1832), ''Nam Kỳ'' (1832–1945), ''Nam Bộ'' (1945–48), and ''Nam Phần'' (1948–75). Southern Vietnam (''Basse-Cochinchine'' in French, or Lower Cochinchina), whose principal city is Saigon, is the newest territory of the Vietnamese people in the movement of '' Nam tiến'' (Southward expansion). This region was also the first part of Vietnam to be colonized by the French as French Cochinchina. Southern Vietnam region was incorporated into the Kingdom of Funan from 1st century CE until 6th century CE. Administration Muni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cycas
''Cycas'' is a genus of plants belonging to a very ancient lineage, the Cycadophyta, which are not closely related to palms, ferns, trees or any other modern group of plants. They are evergreen perennials which achieved their maximum diversity in the Jurassic and Cretaceous periods, when they were distributed almost worldwide. At the end of the Cretaceous, when the non-avian dinosaurs became extinct, so did most of the cycas in the Northern Hemisphere. ''Cycas'' is the type genus and the only extant genus recognised in the family Cycadaceae. About 113 species are accepted. ''Cycas circinalis'', a species endemic to India, was the first cycad species to be described in western literature, and was the type of the generic name, ''Cycas''. The best-known ''Cycas'' species is ''Cycas revoluta''. Range The genus is native to the Old World, with the species concentrated around the equatorial regions - eastern and southeastern Asia including the Philippines with 10 species (9 of which ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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