petal

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petal,

one of the four basic parts of a flowerflower,
name for the specialized part of a plant containing the reproductive organs, applied to angiosperms only. A flower may be thought of as a modified, short, compact branch bearing lateral appendages.
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, next innermost organ from the sepal. The whorl of petals is known collectively as the corolla [Lat.,=little crown]. The number of petals is usually constant within groups (e.g., five in the rose family), as are the numbers of the other organs. Identification by number is, however, complicated by various factors; the petals may be fused, inconspicuous, or entirely absent, in which case their role as the showy part of the flower is sometimes supplanted by modified leaves, the bracts, as in the dogwood and poinsettia, or by modified stamens, as in the canna and the lady's-slipper. Selective breeding can produce petallike stamens (e.g., in cultivated roses and geraniums) and so-called double flowers, i.e., varieties with more than the normal number of petals. Petals are usually brightly colored and often secrete perfume and nectar (in nectaries at the base of the petal) that attract insects and birds needed for cross-pollination. When fertilization has taken place the petals usually drop off; however, in some flowers they persist (see everlastingeverlasting
or immortelle
, names for numerous plants characterized by papery or chaffy flowers that retain their form and often their color when dried and are used for winter bouquets and decorations.
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). In general there are fewer petals and their fusion is greater as the evolutionary development increases. Radially symmetrical arrangement also gives way to bilateral symmetry or even asymmetry.
The Columbia Electronic Encyclopedia™ Copyright © 2013, Columbia University Press. Licensed from Columbia University Press. All rights reserved. www.cc.columbia.edu/cu/cup/
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Petal

 

a leaflike member of the corolla in a flower, which is generally brightly colored. In sympetalous plants, the petals are grown together to some degree. The leaflets of simple corolliform perianths are sometimes erroneously called petals.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

petal

[′ped·əl]
(botany)
One of the sterile, leaf-shaped flower parts that make up the corolla.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

petal

One of the overlapping shingles or tiles in imbrication.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.

petal

any of the separate parts of the corolla of a flower: often brightly coloured
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
References in periodicals archive ?
amostra 25 25 Minimo 14,000 12,1600 Maximo 3,6900 17,0600 Media 2,2452 14,8736 Desvio padrao 0,5641 1,3784 Coef.Variacao 25,12% 9,27% Flor- estilete longo Minimo 14,3300 1,6100 Maximo 22,8700 3,9800 Media 17,7432 2,5676 Desvio padrao 1,8210 0,5484 Coef.Variacao 10,26% 21,36% DC: diametro da corola (mm), CP: comprimento do pedunculo (mm), CA: comprimento da antera (mm), CF: comprimento do filete (mm), AG: altura do gineceu (mm), CE: comprimento do estilete (mm), SAE: separacao antera-estigma.
En esta especie, ocurre el maximo crecimiento de la corola a lo ancho.
(2006), no mercado de plantas de pimentas ornamentais, os descritores cor da corola, cor e formato dos frutos sao de grande importancia, em funcao de promoverem contraste com as folhas da planta, expressando suavidade ou agressividade ao arranjo ornamental.
A maquina atua com maior eficiencia sobre as anteras com filetes mais longos e mais proximas ao ponto de abertura da flor, enquanto os baloes campanulados tem como caracteristica o atrofiamento de alguns filetes, fazendo com que as anteras fiquem voltadas para dentro da corola, dificultando o corte e a separacao, como observado.