วันเสาร์ที่ 3 มกราคม พ.ศ. 2552

Rose

















A rose is a perennial flower shrub or vine of the genus Rosa, within the family Rosaceae, that contains over 100 species. The species form a group of erect shrubs, and climbing or trailing plants, with stems that are often armed with sharp thorns. Most are native to Asia, with smaller numbers of species native to Europe, North America, and northwest Africa. Natives, cultivars and hybrids are all widely grown for their beauty and fragrance.
The leaves are alternate and pinnately compound, with sharply toothed oval-shaped leaflets. The plants fleshy edible fruit is called a rose hip. Rose plants range in size from tiny, miniature roses, to climbers that can reach 20 metres in height. Species from different parts of the world easily hybridize, which has given rise to the many types of garden roses.
Attar of rose is the steam-extracted essential oil from rose flowers that has been used in perfumes for centuries. Rose water, made from the rose oil, is widely used in Asian and Middle Eastern cuisine. Rose hips are occasionally made into jam, jelly, and marmalade, or are brewed for tea, primarily for their high Vitamin C content. They are also pressed and filtered to make rose hip syrup. Rose hips are also used to produce Rose hip seed oil, which is used in skin products and some makeup products.


Cultivation

Rose-picking in the Rose Valley near the town of Kazanlak in Bulgaria, 1870s, engraving by Austro-Hungarian traveller F. Kanitz
See also: Rose cultivars named after celebrities
Roses are popular garden shrubs, as well as the most popular and commonly sold florists' flowers. In addition to their great economic importance as a florists crop, roses are also of great value to the perfume industry.
Many thousands of rose hybrids and cultivars have been bred and selected for garden use; most are double-flowered with many or all of the stamens having mutated into additional petals. As long ago as 1840 a collection numbering over one thousand different cultivars, varieties and species was possible when a rosarium was planted by Loddiges nursery for Abney Park Cemetery, an early Victorian garden cemetery and arboretum in England.
Twentieth-century rose breeders generally emphasized size and colour, producing large, attractive blooms with little or no scent. Many wild and "old-fashioned" roses, by contrast, have a strong sweet scent.
Roses thrive in temperate climates, though certain species and cultivars can flourish in sub-tropical and even tropical climates, especially when grafted onto appropriate rootstock.


History of rose
The rose has always been valued for its beauty and has a long history of symbolism. The ancient Greeks and Romans identified the rose with their goddesses of love referred to as Aphrodite and Venus. In Rome a wild rose would be placed on the door of a room where secret or confidential matters were discussed. The phrase sub rosa, or "under the rose", means to keep a secret — derived from this ancient Roman practice.
Early Christians identified the five petals of the rose with the five wounds of Christ. Despite this interpretation, their leaders were hesitant to adopt it because of its association with Roman excesses and pagan ritual. The red rose was eventually adopted as a symbol of the blood of the Christian martyrs. Roses also later came to be associated with the Virgin Mary.
Rose culture came into its own in Europe in the 1800s with the introduction of perpetual blooming roses from China. There are currently thousands of varieties of roses developed for bloom shape, size, fragrance and even for lack of prickles.





















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