Friday, November 26, 2010

ROSES

rose is a perennial plant of the genus Rosa, within the family Rosaceae. There are over 100 species. They form a group of erect shrubs, and climbing or trailing plants, with stems that are often armed with sharp prickles. Flowers are large and showy, in a number of colours from white through yellows and reds. Most species are native to Asia, with smaller numbers native to Europe, North America, and northwest Africa. Species, cultivars and hybrids are all widely grown for their beauty and fragrance.[1]
The leaves are alternate and pinnately compound, with sharply toothed oval-shaped leaflets. The plant's fleshy fruit, which ripens in the late summer through autumn, is called a rose hip. Rose plants range in size from compact, miniature roses, to climbers that can reach 7 meters in height. Species from different parts of the world easily hybridize, which has given rise to the many types of garden roses.
The name rose comes from French, itself from Latin, rosa, which was borrowed from Oscan, from Greek ρόδιόν rhodion (Aeolic υρόδιόν wrodion), from Old Persian 𐎹𐎢𐎼𐎭𐎡 wurdi "flower" (cf. AvestwardaSogdian wardParthian wâr).[2][3]

Art

Roses are often portrayed by artists. The Luxembourg born Belgian artist Pierre-Joseph Redouté produced some of the most detailed paintings of roses.
Renoir's painting of cabbage rosesRoses in a vase
Henri Fantin-Latour was also a prolific painter of still life, particularly flowers including roses. The Rose 'Fantin-Latour' was named after the artist.
Other impressionists including Claude MonetPaul Cézanne and Pierre-Auguste Renoir have paintings of roses among their works.

Symbolism

The long cultural history of the rose has led to it being used often as a symbol.

Quotes

Rosa gallica Evêque, painted by Redouté

Pests and diseases

Roses are subject to several diseases, such as rose rust (Phragmidium mucronatum), rose black spot, and powdery mildew. Fungal diseases in the Rose are best solved by a preventative fungicidal spray program rather than by trying to cure an infection after it emerges on the plant. After the disease is visible, its spread can be minimized through pruning and the use of fungicides, although the actual infection cannot be reversed. Certain rose varieties are considerably less susceptible than others to fungal diseases.
The main pest affecting roses is the aphid (greenfly), which sucks the sap and weakens the plant. (Ladybugs are a predator of aphids and should be encouraged in the rose garden.) In areas where they are endemic Japanese beetles (Popillia japonica) take a heavy toll on rose flowers and foliage; rose blooms can also be destroyed by infestations of thrips (Thysanoptera spp). Roses are also used as food plants by the larvae of some Lepidoptera (butterfly and moth) species; see list of Lepidoptera that feed on roses. The spraying with insecticide of roses is often recommended but should be done with care to minimize the loss of beneficial insects.

Gallery

No comments:

Post a Comment