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Dipteronia
''Dipteronia'' is a genus with two living and one extinct species in the soapberry family Sapindaceae. The living species are native to central and southern China, The fossil species has been found in Middle Paleocene to Early Oligocene sediments of North America and China. Classification Older classifications segregated the maples (''Acer'') and ''Dipteronia'' into the family Aceraceae, however work by the Angiosperm Phylogeny Group ( APG I onward) and related investigations led to the subsuming of Acereae into Sapindaceae as the tribe Acereae. ''Dipteronia'' is considered to be the sister genus to ''Acer.'' Description They are deciduous flowering shrubs or small trees, reaching tall. The leaf arrangement is opposite and pinnate with between 7 - 15 leaflets to each leaf. The inflorescences are paniculate, terminal or axillary. The flowers have five sepals and petals; staminate flowers have eight stamens, and bisexual flowers have a two-celled ovary. The fruit is a rounded s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dipteronia Brownii
''Dipteronia brownii'' is an extinct species in the soapberry family (Sapindaceae) described in 2001. Fossils of ''D. brownii'' are known from stratigraphic formations in North America and Asia ranging in age between Paleocene to Early Oligocene. Distribution and paleoecology The oldest occurrences for ''Dipteronia brownii'' are both Paleogene in age, with fossils found in the Middle Paleocene, Fort Union Formation of Wyoming and the Danian Middle-Upper Tsagayan Formation of Northeastern coastal Russia. Migration between the slightly older Russian Far East site and North America was likely facilitated by the Beringian land bridge during the early to middle Paleoene.. In the Early Eocene the species expanded into the Eocene Okanagan Highlands sites of East central British Columbia and north east central Washington. Fossils have been found in the Okanagan highlands formations from the southern most Klondike Mountain Formation to the northern most Driftwood Shales, with o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dipteronia Dyeriana
''Dipteronia'' is a genus with two living and one extinct species in the soapberry family Sapindaceae. The living species are native to central and southern China, The fossil species has been found in Middle Paleocene to Early Oligocene sediments of North America and China. Classification Older classifications segregated the maples (''Acer'') and ''Dipteronia'' into the family Aceraceae, however work by the Angiosperm Phylogeny Group ( APG I onward) and related investigations led to the subsuming of Acereae into Sapindaceae as the tribe Acereae. ''Dipteronia'' is considered to be the sister genus to ''Acer.'' Description They are deciduous flowering shrubs or small trees, reaching tall. The leaf arrangement is opposite and pinnate with between 7 - 15 leaflets to each leaf. The inflorescences are paniculate, terminal or axillary. The flowers have five sepals and petals; staminate flowers have eight stamens, and bisexual flowers have a two-celled ovary. The fruit is a rounded s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dipteronia Sinensis Kz2
''Dipteronia'' is a genus with two living and one extinct species in the soapberry family Sapindaceae. The living species are native to central and southern China, The fossil species has been found in Middle Paleocene to Early Oligocene sediments of North America and China. Classification Older classifications segregated the maples (''Acer'') and ''Dipteronia'' into the family Aceraceae, however work by the Angiosperm Phylogeny Group ( APG I onward) and related investigations led to the subsuming of Acereae into Sapindaceae as the tribe Acereae. ''Dipteronia'' is considered to be the sister genus to ''Acer.'' Description They are deciduous flowering shrubs or small trees, reaching tall. The leaf arrangement is opposite and pinnate with between 7 - 15 leaflets to each leaf. The inflorescences are paniculate, terminal or axillary. The flowers have five sepals and petals; staminate flowers have eight stamens, and bisexual flowers have a two-celled ovary. The fruit is a rounded s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dipteronia Sinensis
''Dipteronia sinensis'' is a plant species in the genus ''Dipteronia'', endemic to mainland China, and regarded in the soapberry family Sapindaceae ''sensu lato'' after Angiosperm Phylogeny Group ( APG I 1998, APG II 2003) and more recently (Harrington ''et al.'' 2005) Harrington, M. G., K. J. Edwards, S. A. Johnson, M. W. Chase, and P. A. Gadek. 2005. Phylogenetic inference in Sapindaceae sensu lato using plastid matK and rbcL DNA sequences. ''Systematic Botany'' 30: 366-382 (abstracthere.), or traditionally by several authors in Aceraceae, related to the maples. ''Dipteronia sinensis'' is a deciduous flowering shrub or small tree, reaching 10–15 m tall. The leaf arrangement is opposite and pinnate. The inflorescences are paniculate, terminal or axillary. The flowers have five sepals and petals; staminate flowers have eight stamens, and bisexual flowers have a two-celled ovary. The fruit is a rounded samara Samara ( rus, Сама́ра, p=sɐˈmarə), known from 1935 to 199 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maple
''Acer'' () is a genus of trees and shrubs commonly known as maples. The genus is placed in the family Sapindaceae.Stevens, P. F. (2001 onwards). Angiosperm Phylogeny Website. Version 9, June 2008 nd more or less continuously updated since http://www.mobot.org/MOBOT/research/APweb/. There are approximately 132 species, most of which are native to Asia, with a number also appearing in Europe, northern Africa, and North America. Only one species, ''Acer laurinum'', extends to the Southern Hemisphere.Gibbs, D. & Chen, Y. (2009The Red List of Maples Botanic Gardens Conservation International (BGCI) The type species of the genus is the sycamore maple, '' Acer pseudoplatanus'', the most common maple species in Europe.van Gelderen, C. J. & van Gelderen, D. M. (1999). ''Maples for Gardens: A Color Encyclopedia'' Maples usually have easily recognizable palmate leaves ('' Acer negundo'' is an exception) and distinctive winged fruits. The closest relatives of the maples are the horse c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sapindaceae
The Sapindaceae are a family of flowering plants in the order Sapindales known as the soapberry family. It contains 138 genera and 1858 accepted species. Examples include horse chestnut, maples, ackee and lychee. The Sapindaceae occur in temperate to tropical regions, many in laurel forest habitat, throughout the world. Many are laticiferous, i.e. they contain latex, a milky sap, and many contain mildly toxic saponins with soap-like qualities in either the foliage and/or the seeds, or roots. The largest genera are ''Serjania'', ''Paullinia'', ''Allophylus'' and '' Acer''. Description Plants of this family have a variety of habits, from trees to herbaceous plants to lianas. The leaves of the tropical genera are usually spirally alternate, while those of the temperate maples ('' Acer), Aesculus'', and a few other genera are opposite. They are most often pinnately compound, but are palmately compound in ''Aesculus'', and simply palmate in ''Acer''. The petiole has a swollen ba ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Middle Paleocene
The Selandian is a stage in the Paleocene. It spans the time between . It is preceded by the Danian and followed by the Thanetian. Sometimes the Paleocene is subdivided in subepochs, in which the Selandian forms the "middle Paleocene". Stratigraphic definition The Selandian was introduced in scientific literature by Danish geologist Alfred Rosenkrantz in 1924. It is named after the Danish island of Zealand (Danish: ''Sjælland'') given its prevalence there.Selandien The base of the Selandian is close to the boundary between |
Ovary
The ovary is an organ in the female reproductive system that produces an ovum. When released, this travels down the fallopian tube into the uterus, where it may become fertilized by a sperm. There is an ovary () found on each side of the body. The ovaries also secrete hormones that play a role in the menstrual cycle and fertility. The ovary progresses through many stages beginning in the prenatal period through menopause. It is also an endocrine gland because of the various hormones that it secretes. Structure The ovaries are considered the female gonads. Each ovary is whitish in color and located alongside the lateral wall of the uterus in a region called the ovarian fossa. The ovarian fossa is the region that is bounded by the external iliac artery and in front of the ureter and the internal iliac artery. This area is about 4 cm x 3 cm x 2 cm in size.Daftary, Shirish; Chakravarti, Sudip (2011). Manual of Obstetrics, 3rd Edition. Elsevier. pp. 1-16. . The ovari ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sepal
A sepal () is a part of the flower of angiosperms (flowering plants). Usually green, sepals typically function as protection for the flower in bud, and often as support for the petals when in bloom., p. 106 The term ''sepalum'' was coined by Noël Martin Joseph de Necker in 1790, and derived . Collectively the sepals are called the calyx (plural calyces), the outermost whorl of parts that form a flower. The word ''calyx'' was adopted from the Latin ,Jackson, Benjamin, Daydon; A Glossary of Botanic Terms with their Derivation and Accent; Published by Gerald Duckworth & Co. London, 4th ed 1928 not to be confused with 'cup, goblet'. ''Calyx'' is derived from Greek 'bud, calyx, husk, wrapping' ( Sanskrit 'bud'), while is derived from Greek 'cup, goblet', and the words have been used interchangeably in botanical Latin. After flowering, most plants have no more use for the calyx which withers or becomes vestigial. Some plants retain a thorny calyx, either dried or live, as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Petal
Petals are modified Leaf, leaves that surround the reproductive parts of flowers. They are often advertising coloration, brightly colored or unusually shaped to attract pollinators. All of the petals of a flower are collectively known as the ''corolla''. Petals are usually accompanied by another set of modified leaves called sepals, that collectively form the ''calyx'' and lie just beneath the corolla. The calyx and the corolla together make up the perianth, the non-reproductive portion of a flower. When the petals and sepals of a flower are difficult to distinguish, they are collectively called tepals. Examples of plants in which the term ''tepal'' is appropriate include Genus, genera such as ''Aloe'' and ''Tulipa''. Conversely, genera such as ''Rose, Rosa'' and ''Phaseolus'' have well-distinguished sepals and petals. When the undifferentiated tepals resemble petals, they are referred to as "petaloid", as in petaloid monocots, orders of monocots with brightly colored tepals. Sinc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stamen
The stamen (plural ''stamina'' or ''stamens'') is the pollen-producing reproductive organ of a flower. Collectively the stamens form the androecium., p. 10 Morphology and terminology A stamen typically consists of a stalk called the filament and an anther which contains ''sporangium, microsporangia''. Most commonly anthers are two-lobed and are attached to the filament either at the base or in the middle area of the anther. The sterile tissue between the lobes is called the connective, an extension of the filament containing conducting strands. It can be seen as an extension on the dorsal side of the anther. A pollen grain develops from a microspore in the microsporangium and contains the male gametophyte. The stamens in a flower are collectively called the androecium. The androecium can consist of as few as one-half stamen (i.e. a single locule) as in ''Canna (plant), Canna'' species or as many as 3,482 stamens which have been counted in the saguaro (''Carnegiea gigantea'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Samara (fruit)
A samara (, ) is a winged achene, a type of fruit in which a flattened wing of fibrous, papery tissue develops from the ovary wall. A samara is a simple dry fruit, and is indehiscent (not opening along a seam). The shape of a samara enables the wind to carry the seed farther away from the tree than regular seeds would go, and is thus a form of anemochory. In some cases the seed is in the centre of the wing, as in the elms (genus ''Ulmus''), the hoptree (''Ptelea trifoliata''), and the bushwillows (genus ''Combretum''). In other cases the seed is on one side, with the wing extending to the other side, making the seed autorotate as it falls, as in the maples (genus '' Acer'') and ash trees (genus ''Fraxinus''). There are also single-wing samara such as mahogany (genus Swietenia) which have a shape that enables fluttering. Some species that normally produce paired samaras, such as ''Acer pseudoplatanus'', can also produce them in groups of three or four. File:TripleSycamoreS ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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