| Description: | White Flower Detail Wallpaper |
| Category | The magic beauty of the flowers |
| Image Filesize | 949.8 KB |
| Date: | 20.05.2011 14:04 |
| Last view date | 24.05.2012 03:11 |
| Last view user | Guest |
| Hits: | 1487 |
| Downloads: | 103 |
| Rating: | 0.00 (0Vote(s)) |
| File size: | 949.8 KB |
| Added by: | admin |
|
Image Codes: Thumbnail for websites Thumbnail for forums Use the below codes to post the full sized image on other websites or forums Hotlink for websites Hotlink for forums Share this image with your friends Share this image Direct path to image |
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
TERMS OF DOWNLOAD & USE:
These free desktop wallpapers are for personal use on computer screens only. redistributed, offered for free download.
They may not be for sale, included on CDs, or used for printed material.
All wallpapers are copyrighted to their respective owners. If you are the author of any of the desktop wallpapers found on this website
and you can prove this, please do not hesitate to let us know and we'll put your deserved credits
or remove it at your request. So don't claim copyrights!
Mail us: contact(at)pulsarmedia(dot)eu
A flower, sometimes known as a bloom or blossom, is the reproductive structure found in flowering plants (plants of the division Magnoliophyta, also called angiosperms). 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 (fusion of sperm and eggs from different individuals in a population) or allow selfing (fusion of sperm and egg from the same flower). Some flowers produce diaspores without fertilization (parthenocarpy). Flowers contain sporangia and are the site where gametophytes develop. Flowers give rise to fruit and seeds. Many flowers have evolved to be attractive to animals, so as to cause them to be vectors for the transfer of pollen.
In addition to facilitating the reproduction of flowering plants, flowers have long been admired and used by humans to beautify their environment, and also as objects of romance, ritual, religion, medicine and as a source of food.
A stereotypical flower consists of four kinds of structures attached to the tip of a short stalk. Each of these kinds of parts is arranged in a whorl on the receptacle. The four main whorls (starting from the base of the flower or lowest node and working upwards) are as follows:
Although the arrangement described above is considered "typical", plant species show a wide variation in floral structure. These modifications have significance in the evolution of flowering plants and are used extensively by botanists to establish relationships among plant species.
The four main parts of a flower are generally defined by their positions on the receptacle and not by their function. Many flowers lack some parts or parts may be modified into other functions and/or look like what is typically another part. In some families, like Ranunculaceae, the petals are greatly reduced and in many species the sepals are colorful and petal-like. Other flowers have modified stamens that are petal-like, the double flowers of Peonies and Roses are mostly petaloid stamens.[1] Flowers show great variation and plant scientists describe this variation in a systematic way to identify and distinguish species.
Specific terminology is used to describe flowers and their parts. Many flower parts are fused together; fused parts originating from the same whorl are connate, while fused parts originating from different whorls are adnate, parts that are not fused are free. When petals are fused into a tube or ring that falls away as a single unit, they are sympetalous (also called gamopetalous.) Connate petals may have distinctive regions: the cylindrical base is the tube, the expanding region is the throat and the flaring outer region is the limb. A sympetalous flower, with bilateral symmetry with an upper and lower lip, is bilabiate. Flowers with connate petals or sepals may have various shaped corolla or calyx including: campanulate, funnelform, tubular, urceolate, salverform or rotate.
Many flowers have a symmetry. When the perianth is bisected through the central axis from any point, symmetrical halves are produced, forming a radial symmetry. These flowers are also known to be actinomorphic or regular, e.g. rose or trillium. When flowers are bisected and produce only one line that produces symmetrical halves the flower is said to be irregular or zygomorphic, e.g. snapdragon or most orchids.
Source: Wikipedia
Powered by 4images 1.7.6
Copyright © 2002-2012 Pulsarmedia 4images Template | Please send your feedback & suggestions to contact(at)pulsarmedia.eu