sepal


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sepal,

a modified leaf, part of the outermost of the four groups of 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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 parts. The sepals of a flower are collectively called the calyx and act as a protective covering of the inner flower parts in the bud. Sepals are usually green, but in some flowers (e.g., the lily and the orchid) they are the same color as the petals and may be confused with them. In some groups of plants (e.g., the marsh marigold and the anemone) they are absent. The small green leaflike structures at the base of the flower head in the aster family are not true sepals but bracts; the sepals are modified into a circle of tiny white hairs on the ovary (the pappus; see asteraster
[Gr.,=star], common name for the Asteraceae (Compositae), the aster family, in North America, name for plants of the genus Aster, sometimes called wild asters, and for a related plant more correctly called China aster (Callistephus chinensis
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). The sepals are sometimes fused into a tube around the base of the petals, as in the mint family.
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sepal

[sēp·əl]
(botany)
One of the leaves composing the calyx.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

sepal

any of the separate parts of the calyx of a flower
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
References in periodicals archive ?
With the force exerted by petals and sepals at the time of flower closing, styli assume elongated vertical standing positioning and stigmas appear on the outside of the flower, which does not allow classification and occurrence of the different types of curvature observed in yellow and sweet passion fruit.
Gray's protologue description includes some comments about the peculiarity of the dissimilarity of the light-yellow petaloid sepals, indicating that this species may deserve to be framed in a special section of the genus Streptanthus Nutt.
The calyx is weakly monosymmetfic with three subequal, keeled, pale green sepals tinged distally with purple.
Flowers have four basic organs in common: sepals, petals, stamens, and pistils.
The [F.sub.1] of HG x NG crosses were all intermediate HG (i.e., [greater than] 3 glands but fewer glands than the HG parental type on upper portion of sepal), indicating that the putative [Mathematical Expression Omitted] allele was partially dominant to the wild type [Gl.sub.3] allele.
foliosissimum produces different concentrations of volatiles in the corolla (petals) than in the calyx (sepals) and that the flower offers a succession of fragrances during the reproductive cycle.
The "mean" female flower was as similar in shape and size to the actual mean male flower as was possible (sepal width, sepal length = 13.3 mm, sepal area 139 [mm.sup.2]).
Sepals in fruit about as long as glands or slightly longer, rounded, thin, abaxially proximally sericeous and distally glabrous, adaxially glabrous; calyx glands 8, 3-3.5 mm long in fruit, obovate, 2 partially connate.
Results of the study have shown the importance of elliptic Fourier and landmark-based to evaluate quantitatively the petal, sepal and labellum shapes of four varieties of Mokara.