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Buy Wholesale and maintain an Active status for 2 months and we will refund your $39 Distributor Fee
14-September-2008 18:38:46 - Petal Redirected from Corolla flower Look up petal in Wiktionary, the free dictionary. Corolla flower redirects here. For other uses, see Corolla. For the petals of chakras, see Petal chakra. Tetrameric flower of the Primrose Willowherb Ludwigia octovalvis showing petals and sepals Tetrameric flower of the Primrose Willowherb Ludwigia octovalvis showing petals and sepals This tulip has dozens of petals. This tulip has dozens of petals. A petal from Ancient Greek petalon leaf, thin plate, regarded as a highly modified leaf, is one member or part of the corolla of a flower. The corolla is the name for all of the petals of a flower; the inner perianth whorl, term used when this is not the same in appearance color, shape as the outermost whorl the calyx and is used to attract pollinators based on its bright color. It is the inner part of the perianth that comprises the sterile parts of a flower and consists of inner and outer tepals. These tepals are usually differentiated into petals and sepals. The term tepal is usually applied when the petals and sepals are similar in shape and color. In a typical flower the petals are showy and colored and surround the reproductive parts. The number of petals in a flower see merosity is indicative of the plant's classification: eudicots the largest group of dicots having typically four or five petals and monocots and magnoliids having three, or some multiple of three, petals.1 There exists considerable variation in form of petals among the flowering plants. The petals can be united towards the base, forming a floral tube. In some flowers, the entire perianth forms a cup called a calyx tube surrounding the gynoecium, with the sepals, petals, and stamens attached to the rim of the cup. The flowers of some species lack or have very much reduced petals. These are often referred to as apetalous. Examples of flowers with much reduced perianths are found among the grasses. The petals are usually the most conspicuous parts of a flower, and the petal whorl or corolla may be either radially or bilaterally symmetrical. If all of the petals are essentially identical in size and shape, the flower is said to be regular or actinomorphic meaning 'ray-formed'. Many flowers are symmetrical in only one plane i.e., symmetry is bilateral and are termed irregular or zygomorphic meaning yoke- or pair-formed. In irregular flowers, other floral parts may be modified from the regular form, but the petals show the greatest deviation from radial symmetry. Examples of zygomorphic flowers may be seen in orchids and members of the pea family. The petal is the colorful, often showy part of a plant. Other structures which may look like petals Some plants have petaloid stamens, in plants like Canna that have true petals and staminodes, the stamen staminodes are modified to look like large showy petals. A number of plants have bracts that resemble petals for example in Bougainvillea and Cornus florida flowering dogwood. Petal-like bracts are common features in some plant families like Euphorbiaceae. In many plants of the aster family such as the sunflower, Helianthus annuus, the circumference of the flower head is composed of ray florets. Each ray floret is anatomically an individual flower with a single large petal. Corolla Corolla is the collective term for petals of a flower taken as a group within the calyx. Normally the corolla is the most conspicuous part of a flower and of a bright colour other than green. The concept of corolla description is widely used in botany as a primary determinant of vascular plant identification. Alternatively the corolla may be considered as the inner whorl of the perianth structure. The role of the corolla in plant evolution has been studied extensively since Darwin postulated a theory of the origin of elongated corollae.2 References ^ Pamela S. Soltis and Douglas E. Soltis 2004. The origin and diversification of angiosperms. American Journal of Botany 91: 1614-1626. doi:10.3732/ajb.91.10.1614. ^ Analysis of theory of evolution of corolla elongation involving pollinating species Retrieved from http://en..org/wiki/Petal#Corolla Categories: Plant morphology | Reproductive system | Pollination Views Article Discussion this page History Personal tools Log in / create account Navigation Main page Contents Featured content Current events Random article Search Go Search Interaction Community portal Recent changes Contact Donate to Help Toolbox What links here Related changes Upload file Special pages Printable version Permanent link Cite this page Languages Avañe'ẽ Català Deutsch Español Esperanto Français Hornjoserbsce Italiano עברית Nederlands Português Simple English СрпÑ?ки / Srpski ä¸æ–‡ This page was last modified on 15 August 2008, at 00:32
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