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Leitneria
''Leitneria floridana'' (corkwood), the sole species in the genus ''Leitneria'', is a deciduous dioecious shrub or small tree, found only in the southern United States states of Arkansas, Florida, Georgia, Missouri and Texas. It grows at damp habitats, mostly in coastal areas and has extremely light wood with a density less than that of cork. It typically reaches 2–4 m tall, occasionally up to 8 m. The trunk can reach 10 cm in diameter. The leaves are alternate, simple lanceolate, 5–20 cm long and 3–6 cm broad. In the past, it was treated as the only species in the family Leitneriaceae of the order Leitneriales, but genetic research by the Angiosperm Phylogeny Group has recently resulted in its being transferred to the family Simaroubaceae in the Sapindales. It is named after the German natural scientist E. F. Leitner. Fossil record A single, strongly compressed endocarp has been collected from the sediments of the Villa San Faustino site in Italy. T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Edward Frederick Leitner
Edward Frederick Leitner, also Friedrich August Ludwig Leitner (4 February 1812, in Stuttgart – 15 January 1838) was a German botanist, naturalist and physician. At the age of four, his family moved to Schorndorf after the death of his father. Following studies of botany at the University of Tübingen, he moved to the United States after receiving a subsidy from the Society of Natural Sciences in Württemberg. In 1831 he began taking classes at the Medical College of South Carolina in Charleston. In 1833 collected botanical and zoological specimens in Florida, eventually reaching the Florida Keys, during which, he paid a visit to the Dry Tortugas.JSTOR Global Plants biography In 1834, he graduated from medical college with a dissertation on '' [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Simaroubaceae
The Simaroubaceae are a small, mostly tropical, family in the order Sapindales. In recent decades, it has been subject to much taxonomic debate, with several small families being split off. A molecular phylogeny of the family was published in 2007, greatly clarifying relationships within the family. Together with chemical characteristics such as the occurrence of petroselinic acid in ''Picrasma'', in contrast to other members of the family such as ''Ailanthus'', this indicates the existence of a subgroup in the family with ''Picrasma'', ''Holacantha'', and ''Castela''. The best-known species is the temperate Chinese tree-of-heaven ''Ailanthus altissima'', which has become a cosmopolitan weed tree of urban areas and wildlands. Well-known genera in the family include the tropical ''Quassia'' and ''Simarouba ''Simarouba'' is a genus of trees and shrubs in the family Simaroubaceae, native to the neotropics. It has been grouped in the subtribe Simaroubina along with the ''Simaba'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shrub
A shrub (often also called a bush) is a small-to-medium-sized perennial woody plant. Unlike herbaceous plants, shrubs have persistent woody stems above the ground. Shrubs can be either deciduous or evergreen. They are distinguished from trees by their multiple stems and shorter height, less than tall. Small shrubs, less than 2 m (6.6 ft) tall are sometimes termed as subshrubs. Many botanical groups have species that are shrubs, and others that are trees and herbaceous plants instead. Some definitions state that a shrub is less than and a tree is over 6 m. Others use as the cut-off point for classification. Many species of tree may not reach this mature height because of hostile less than ideal growing conditions, and resemble a shrub-sized plant. However, such species have the potential to grow taller under the ideal growing conditions for that plant. In terms of longevity, most shrubs fit in a class between perennials and trees; some may only last about five y ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alvan Wentworth Chapman
Alvan Wentworth Chapman (September 28, 1809 – April 6, 1899) was an American physician and pioneering botanist in the study of flora of the American Southeast.Makers of American Botany, Harry Baker Humphrey, Ronald Press Company, Library of Congress Card Number 61-18435 He wrote ''Flora of the Southern United States'', the first comprehensive description of US plants in any region beyond the northeastern states. Education He was born in Southampton, Massachusetts, the youngest of five children. In 1830, he graduated from Amherst College with a degree in classics. He moved to Georgia and then Florida where he held various teaching positions, and married Mary Ann Hancock in 1839. In the early 1840s, he received a medical education, acquiring his MD in 1846. In 1847, he settled in Apalachicola, Florida, remaining there for the rest of his life working as a physician and botanist, collaborating with Asa Gray. Botanical works His botanical interest seems to have started when he liv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Angiosperm Phylogeny Group
The Angiosperm Phylogeny Group (APG) is an informal international group of systematic botanists who collaborate to establish a consensus on the taxonomy of flowering plants (angiosperms) that reflects new knowledge about plant relationships discovered through phylogenetic studies. , four incremental versions of a classification system have resulted from this collaboration, published in 1998, 2003, 2009 and 2016. An important motivation for the group was what they considered deficiencies in prior angiosperm classifications since they were not based on monophyletic groups (i.e., groups that include all the descendants of a common ancestor). APG publications are increasingly influential, with a number of major herbaria changing the arrangement of their collections to match the latest APG system. Angiosperm classification and the APG In the past, classification systems were typically produced by an individual botanist or by a small group. The result was a large number of systems ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trees Of The South-Central United States
In botany, a tree is a perennial plant with an elongated stem, or trunk, usually supporting branches and leaves. In some usages, the definition of a tree may be narrower, including only woody plants with secondary growth, plants that are usable as lumber or plants above a specified height. In wider definitions, the taller palms, tree ferns, bananas, and bamboos are also trees. Trees are not a taxonomic group but include a variety of plant species that have independently evolved a trunk and branches as a way to tower above other plants to compete for sunlight. The majority of tree species are angiosperms or hardwoods; of the rest, many are gymnosperms or softwoods. Trees tend to be long-lived, some reaching several thousand years old. Trees have been in existence for 370 million years. It is estimated that there are some three trillion mature trees in the world. A tree typically has many secondary branches supported clear of the ground by the trunk. This trunk typically ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trees Of The North-Central United States
In botany, a tree is a perennial plant with an elongated stem, or trunk, usually supporting branches and leaves. In some usages, the definition of a tree may be narrower, including only woody plants with secondary growth, plants that are usable as lumber or plants above a specified height. In wider definitions, the taller palms, tree ferns, bananas, and bamboos are also trees. Trees are not a taxonomic group but include a variety of plant species that have independently evolved a trunk and branches as a way to tower above other plants to compete for sunlight. The majority of tree species are angiosperms or hardwoods; of the rest, many are gymnosperms or softwoods. Trees tend to be long-lived, some reaching several thousand years old. Trees have been in existence for 370 million years. It is estimated that there are some three trillion mature trees in the world. A tree typically has many secondary branches supported clear of the ground by the trunk. This trunk typically ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trees Of The Southeastern United States
In botany, a tree is a perennial plant with an elongated stem, or trunk, usually supporting branches and leaves. In some usages, the definition of a tree may be narrower, including only woody plants with secondary growth, plants that are usable as lumber or plants above a specified height. In wider definitions, the taller palms, tree ferns, bananas, and bamboos are also trees. Trees are not a taxonomic group but include a variety of plant species that have independently evolved a trunk and branches as a way to tower above other plants to compete for sunlight. The majority of tree species are angiosperms or hardwoods; of the rest, many are gymnosperms or softwoods. Trees tend to be long-lived, some reaching several thousand years old. Trees have been in existence for 370 million years. It is estimated that there are some three trillion mature trees in the world. A tree typically has many secondary branches supported clear of the ground by the trunk. This trunk typically co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cenozoic
The Cenozoic ( ; ) is Earth's current geological era, representing the last 66million years of Earth's history. It is characterised by the dominance of mammals, birds and flowering plants, a cooling and drying climate, and the current configuration of continents. It is the latest of three geological eras since complex life evolved, preceded by the Mesozoic and Paleozoic. It started with the Cretaceous–Paleogene extinction event, when many species, including the non-avian dinosaurs, became extinct in an event attributed by most experts to the impact of a large asteroid or other celestial body, the Chicxulub impactor. The Cenozoic is also known as the Age of Mammals because the terrestrial animals that dominated both hemispheres were mammalsthe eutherians (placentals) in the northern hemisphere and the metatherians (marsupials, now mainly restricted to Australia) in the southern hemisphere. The extinction of many groups allowed mammals and birds to greatly diversify so that l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cervo River
The Cervo (Piedmontese ''Sar'' or ''Serv'') is a torrent (a form of seasonally intermittent stream) in the Piedmont region of north-west Italy. It is the principal tributary of the river Sesia, which itself is a significant tributary of the Po. Etymology The name ''Cervo'' rather than from the Latin ''cervus'' (''deer'') should come from the Germanic ''saar'' (''stream'' or ''river''). Geography It crosses the provinces of Biella (communes of Piedicavallo, Rosazza, Campiglia Cervo, Sagliano Micca, Andorno Micca, Tollegno, Biella, Candelo and Castelletto Cervo) and Vercelli ( Quinto Vercellese). The Cervo’s source is the Lago della Vecchia (close to the '' Rifugio della Vecchia'') in the Biellese Prealps. From the Lago della Vecchia it flows rapidly through a large number of communes of the Valle del Cervo. Close to Tollegno it receives the torrent Oropa from the right then crosses the eastern part of the city of Biella, in particular the quarter of Chiavazza. From ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pliocene
The Pliocene ( ; also Pleiocene) is the epoch in the geologic time scale that extends from 5.333 million to 2.58See the 2014 version of the ICS geologic time scale million years ago. It is the second and most recent epoch of the Neogene Period in the . The Pliocene follows the Epoch and is followed by the Epoch. Prior to the 2009 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pleistocene
The Pleistocene ( , often referred to as the ''Ice age'') is the geological Epoch (geology), epoch that lasted from about 2,580,000 to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations. Before a change was finally confirmed in 2009 by the International Union of Geological Sciences, the cutoff of the Pleistocene and the preceding Pliocene was regarded as being 1.806 million years Before Present (BP). Publications from earlier years may use either definition of the period. The end of the Pleistocene corresponds with the end of the last glacial period and also with the end of the Paleolithic age used in archaeology. The name is a combination of Ancient Greek grc, label=none, πλεῖστος, pleīstos, most and grc, label=none, καινός, kainós (latinized as ), 'new'. At the end of the preceding Pliocene, the previously isolated North and South American continents were joined by the Isthmus of Panama, causing Great American Interchang ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
