
Orchids make up the largest family of all the world's flowering plants.They occur on every continent except Antarica and a have a most remarkable diversity of habitat form and colour.
While the greatest number of ohids is found in tropical and subtropical region, they can also be in near-deasert conditions, tundra and in mountain country.
Orchid flower vary in size from large slowy blooms the size of saucers to tiny treasures a couple of millimetres across.
Some orchids are truly breathtaking in their beauty while others may be quite strange and almost ugly to some eyes but all are simply facinating . All orchids should have the spent flowers cut off once they are past their best.
TYPES OF ORCHIDS
HYBRIDS
Orhids in the wild hybridisereadily,and so many natural huybrids arise.Flowers in their natural situatios are pollinated by a range of creatures,including bees wasps.flies, birds,bats,antsand beetles.Today,commercial growers and enthusiasts making deliberate cross-pollinations are responsiblefor intruducing many new orchid cultivars and varieties each year .There are now at least 75,000 registered orchids hybrids. Since the 1890s hybrid have been registered in what is now called the orchid Register run by the Royal HorticulturalSociaty in London.For many years, however,it was known as Sanders'Orchids Hybrid Lists, named after the ochid enthusiastwho began dounting task of ducument the whole range of orchids and their parentage.
ORCHID CULTURE
For many centuries orchid culture was strictly the province of the rich powerful,not only because of the enormous cost of acquiring these plants but beacause of the cost of building and heating suitable structuresfor the succesful cultivation. Nowadays special prize-winning plants are stillexpensive but the advent of plant tisue culture,which allows large numbers of plants to be propagated from a very little material, has meant that plants generally more affordable.There is now a huge number of entusiasts growing orchids all over the world.
Today many orchids are cultivated commercially for the cut flower, trade that has graet monetary value.
Otherwise only the vanilla orchid, Vanilla platinifolia, has commercial value. It grows on a heavy .twining vine and is cultivated for its aromatic and flavoursome bean ,but only in tropicalregions where constant high temperatures and humidity prevail.
The vast majority of orchids are epiphytes that grow on tress,but they use the tree as support only -the are not parasites.
Other orchids are lithophytesthat grow on the rocks,or terrestrial types that grow in the ground.Orchids are further distinguished to grow:monopodial orchids,mainly epiphytes,grow with single steam and produced aerial root , while symble orchids have a rhizome[runningroot]that produces a pseudobulb from which growth emerges.Many of these sympodial orchids are terrestrial.
Orchids from cooler and more temperature, although some terrestrials, orchids occur in warm regions too.
CYMBIDIUM species and cultibars