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.

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.

petal

[′ped·əl]
(botany)
One of the sterile, leaf-shaped flower parts that make up the corolla.

petal

One of the overlapping shingles or tiles in imbrication.

petal

any of the separate parts of the corolla of a flower: often brightly coloured
References in periodicals archive ?
"Optimization of Petaloid Base Dimensions and Process Operating Conditions to Minimize Environmental Stress Cracking in Injection Stretch Blow Moulded PET Bottles," PhD Thesis, RM1T University, Australia (2008).
She focuses on Petaloid Monocotyledons, which include orchids, irises, lilies, grass-trees, and mat-rushes, helping readers identify them through color drawings and description of family characteristics.
In some flowers, the sepals appear petaloid; in others, highly modified staminodia are petal-like.
staminodium: Sterile stamen, nonfunctional anthers and often with petaloid filaments.
Pressure levels and exposure temperatures are quite low for these products, eliminating the need for petaloid bases, vacuum panels/bases, or heat setting.
We monitored focal individuals of the 10 plant species at weekly intervals during each summer for the presence of 6 phenological stages: unopened buds (recorded as stage 1), open flowers (stage 2), old flowers (stage 3 [post-anthesis but with petals, tepals, or petaloid sepals still attached]), initiated fruit (stage 4 [petals abscised but ovaries unexpanded]), expanding fruit (stage 5 [ovaries enlarged]), and dehisced fruit (stage 6).
These are suitable for production rates up to 10,000bph, for the supply of cylindrical and petaloid containers up to two litres capacity.
And the industry continues to improve recyclability of these products, by replacing metal caps and paper labels with plastics and by replacing the beverage bottle and separate HDPE basecup with the one-piece petaloid bottle.
If flowers were apetalous, then the petaloid part of the flower (sepals, tepals, glumes, etc.) was used for the above characters.
The fertile stamen develops from the inner stamen whorl and is petaloid with the thecae located on the adaxial surface and the connective extending above the region of pollen production.
This Combi also incorporates the latest Sidel technologies such as bottle lightweighting made possible with the new petaloid base design.