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Beesia
''Beesia'' is a genus of flowering plants in the buttercup family. It was named in 1915 after the plant nursery firm Bees of Chester, who financed the plant hunting trips of George Forrest and Frank Kingdon-Ward in China. Species There are two species of ''Beesia'': *''Beesia calthifolia'', which is native to the following WGSRPD floristic regions: North-Central China, South-Central China, Southeast China, East Himalaya, and Myanmar. *''Beesia deltophylla'', which is native to southeastern Tibet. Description Morphology Beesia is an evergreen perennial and grows as a dense basal rosette of heart-shaped leaves with delicate serrated edges. Leaves are soft and waxy; new growth of ''B. deltophylla'' flushes dark green to black, while ''B. calthifolia'' is a lighter shade of green. Small white flowers bloom mid-summer off an upright spike. Flowers are star-like: although ''Beesia'' flowers do not have petals, they do have 5 elliptic, petal-like sepals. Flowers also have ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beesia Deltophylla
''Beesia'' is a genus of flowering plants in the buttercup family. It was named in 1915 after the plant nursery firm Bees of Chester, who financed the plant hunting trips of George Forrest and Frank Kingdon-Ward in China. Species There are two species of ''Beesia'': *''Beesia calthifolia'', which is native to the following WGSRPD floristic regions: North-Central China, South-Central China, Southeast China, East Himalaya, and Myanmar. *''Beesia deltophylla'', which is native to southeastern Tibet. Description Morphology Beesia is an evergreen perennial and grows as a dense basal rosette of heart-shaped leaves with delicate serrated edges. Leaves are soft and waxy; new growth of ''B. deltophylla'' flushes dark green to black, while ''B. calthifolia'' is a lighter shade of green. Small white flowers bloom mid-summer off an upright spike. Flowers are star-like: although ''Beesia'' flowers do not have petals, they do have 5 elliptic, petal-like sepals. Flowers also have ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
William Wright Smith
Sir William Wright Smith FRS FRSE FLS VMH LLD (2 February 1875 Lochmaben, Dumfriesshire – 15 December 1956) was a Scottish botanist and horticulturalist. Life He was born at Parkend farm near Lochmaben in Dumfriesshire, the son of James T. Smith, a farmer. He was educated at Dumfries Academy and then studied at University of Edinburgh where he graduated MA around 1895. He then undertook postgraduate studies at the University of Toulouse. He rose to become from 1922 to 1956 the Queen's Botanist in Scotland, the 10th Regius Keeper of the Royal Botanic Garden Edinburgh, Regius Professor of Botany at the University of Edinburgh. Aberdeen University granted him an honorary doctorate (LLD). He was elected President of the Botanical Society of Edinburgh for 1922–25 and 1935–36. He was elected a Fellow of the Royal Society of Edinburgh in 1919, his proposers being Sir Isaac Bayley Balfour, James Hartley Ashworth and Donald Cameron McIntosh. He served as secretary to the soc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ranunculaceae
Ranunculaceae (buttercup or crowfoot family; Latin "little frog", from "frog") is a family of over 2,000 known species of flowering plants in 43 genera, distributed worldwide. The largest genera are ''Ranunculus'' (600 species), ''Delphinium'' (365), ''Thalictrum'' (330), ''Clematis'' (325), and ''Aconitum'' (300). Description Ranunculaceae are mostly herbaceous annuals or perennials, but some are woody climbers (such as ''Clematis'') or shrubs (e.g. ''Xanthorhiza''). Most members of the family have bisexual flowers which can be showy or inconspicuous. Flowers are solitary, but are also found aggregated in cymes, panicles, or spikes. The flowers are usually radially symmetrical but are also found to be bilaterally symmetrical in the genera ''Aconitum'' and ''Delphinium''. The sepals, petals, stamens and carpels are all generally free (not fused), the outer flower segments typically number four or five. The outer stamens may be modified to produce only nectar, as in Aqui ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tibet Autonomous Region
The Tibet Autonomous Region or Xizang Autonomous Region, often shortened to Tibet or Xizang, is a Provinces of China, province-level Autonomous regions of China, autonomous region of the China, People's Republic of China in Southwest China. It was overlayed on the traditional Tibetan regions of Ü-Tsang and Kham. It was formally established in 1965 to replace the Tibet Area (administrative division), Tibet Area, the former Administrative divisions of China, administrative division of the People's Republic of China (PRC) established after the annexation of Tibet by the People's Republic of China, annexation of Tibet. The establishment was about five years after the 1959 Tibetan uprising and the dismissal of the Kashag, and about 13 years after the original annexation. The current borders of the Tibet Autonomous Region were generally established in the 18th century and include about half of historic Tibet, or the Tibet, ethno-cultural Tibet. The Tibet Autonomous Region spans ov ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Triterpene
Triterpenes are a class of chemical compounds composed of three terpene units with the molecular formula C30H48; they may also be thought of as consisting of six isoprene units. Animals, plants and fungi all produce triterpenes, including squalene, the precursor to all steroids. Structures Triterpenes exist in a great variety of structures. Nearly 200 different skeletons have been identified. These skeletons may be broadly divided according to the number of rings present. In general pentacyclic structures (5 rings) tend to dominate. Squalene is biosynthesized through the head-to-head condensation of two farnesyl pyrophosphate units. This coupling converts a pair of C15 components into a C30 product. Squalene serves as precursor for the formation of many triterpenoids, including bacterial hopanoids and eukaryotic sterols. Triterpenoids By definition triterpenoids are triterpenes that possess heteroatoms, usually oxygen. The terms ''triterpene'' and ''triterpenoid'' oft ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glycoside
In chemistry, a glycoside is a molecule in which a sugar is bound to another functional group via a glycosidic bond. Glycosides play numerous important roles in living organisms. Many plants store chemicals in the form of inactive glycosides. These can be activated by enzyme hydrolysis, which causes the sugar part to be broken off, making the chemical available for use. Many such plant glycosides are used as medications. Several species of ''Heliconius'' butterfly are capable of incorporating these plant compounds as a form of chemical defense against predators. In animals and humans, poisons are often bound to sugar molecules as part of their elimination from the body. In formal terms, a glycoside is any molecule in which a sugar group is bonded through its anomeric carbon to another group via a glycosidic bond. Glycosides can be linked by an O- (an ''O-glycoside''), N- (a ''glycosylamine''), S-(a ''thioglycoside''), or C- (a '' C-glycoside'') glycosidic bond. According to th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cycloartane
Cycloartane is a triterpene, also known as 4,4,14-trimethyl-9,19-cyclo-5alpha,9beta-cholestane. Its derivative cycloartenol is the starting point for the synthesis of almost all plant steroids. See also * Lanostane * Cycloastragenol Cycloastragenol is a triterpenoid isolated from various legume species in the genus ''Astragalus'' that is purported to have telomerase activation activity. A preliminary ''in vitro'' study on human CD4 and CD8 T cells found that cycloastragenol ... * Cycloartenyl ferulate References Triterpenes {{organic-compound-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Organic Compound
In chemistry, organic compounds are generally any chemical compounds that contain carbon-hydrogen or carbon-carbon bonds. Due to carbon's ability to catenate (form chains with other carbon atoms), millions of organic compounds are known. The study of the properties, reactions, and syntheses of organic compounds comprise the discipline known as organic chemistry. For historical reasons, a few classes of carbon-containing compounds (e.g., carbonate salts and cyanide salts), along with a few other exceptions (e.g., carbon dioxide, hydrogen cyanide), are not classified as organic compounds and are considered inorganic. Other than those just named, little consensus exists among chemists on precisely which carbon-containing compounds are excluded, making any rigorous definition of an organic compound elusive. Although organic compounds make up only a small percentage of Earth's crust, they are of central importance because all known life is based on organic compounds. Living t ... [...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] |
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] |
Ellipse
In mathematics, an ellipse is a plane curve surrounding two focus (geometry), focal points, such that for all points on the curve, the sum of the two distances to the focal points is a constant. It generalizes a circle, which is the special type of ellipse in which the two focal points are the same. The elongation of an ellipse is measured by its eccentricity (mathematics), eccentricity e, a number ranging from e = 0 (the Limiting case (mathematics), limiting case of a circle) to e = 1 (the limiting case of infinite elongation, no longer an ellipse but a parabola). An ellipse has a simple algebraic solution for its area, but only approximations for its perimeter (also known as circumference), for which integration is required to obtain an exact solution. Analytic geometry, Analytically, the equation of a standard ellipse centered at the origin with width 2a and height 2b is: : \frac+\frac = 1 . Assuming a \ge b, the foci are (\pm c, 0) for c = \sqrt. The standard parametric e ... [...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] |
