Parts of the Flower

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  • Topic: Flower, Pollen, Plant sexuality
  • Pages : 3 (628 words )
  • Download(s) : 218
  • Published : March 16, 2013
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Parts Of The Flower
A flower, sometimes known as a bloom or blossom, is the reproductive structure found in flowering plants. The biological function of a flower is to effect reproduction, usually by providing a mechanism for the union of sperm with eggs. Flowers may facilitate outcrossing or allow selfing. Many flowers have evolved to be attractive to animals, so that they can be vectors for the transfer of pollen. 1.) Pistil- It is the female reproductive part of the flower.  Located in the center of the flower. Often vase-shaped, the pistil consists of three parts: the stigma, the style and the ovary. * Stigma- It is the reception are for the pollen.  The stigma is adapted to catch and trap pollen with various hairs, flaps, or sculpturings The pollen may be captured from the air ,from visiting insects or other animals , or in rare cases from surrounding water. It is sticky and velvety in texture . * Style- It is a slender stalk for the passage of pollen nuclei . Located between ovary and stigma * Ovary- Is the enlarged basal portion that contains one or more ovule-bearing units called carpels. Each ovule contains the female gamete, the egg & 2 polar bodies, which become the endosperm. 2.) Stamen- Is the male reproductive structure of a flower. It is consist of 4 pollen-containing chambers that are fused into a structure called Anther. Inside the anther are the pollen grains , each of which contains the male gamete and the generate sperm nucleus. The Filament supports & hold the anther to the pistil. 3.) Sepals- They are known as the CALYX . They form the outermost part surrounding & holding the petals & at the same time, protecting part of the inner part of a flower. 4.) Petals- Known as the COROLLA, are typically the brightly coloured parts of the flower. They have aromatic substance & nectar which are used to attract insect pollinators. The tip to which the floral organ are attaches are called RECEPRACLES....
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