Orchids are quite unlike other plants, stand apart by their fantastic range of structure and formation of their flowers and seed production. Every thing about the orchid is different and perhaps the makes people orchid maniacs The name ‘orchid’ is derived from the greek word ‘orchis’, Theophrastus, a Greek naturalist refereed to a group of plants called orchis as far as back as 300 B.C. it refers to the roots of this genus which are infact testiculate tubers occurring in pairs Orchids belong to one of the largest families of flowering plants. There are about 26000 wild species distributed all over the world. However, wild species of orchids distributed all over the world. However wild species are estimated from 20,000 to 35, 000 under 800 genera by different authors. They are mostly perennial plants and bloom annually. Flowers of several genera last for their lasting and beautiful flowers. The majority of the orchids are epiphytic growing upon tree trunks. Some grow as terrestrial and others as lithophytic. A few are saprophytic. The orchid plants are distinct in type of vegetation structure and flower architecture. On the basis of vegetative structure and its growth, orchids may be grouped as: 1. Monopodial: these orchids grow continuously in one direction, season after season and bear aerial roots. 2. Sympodial: in this case after one season growth, the lateral growth is produced in next growing season. 3. Pseudomonopodial: these are intermediate between monopodial and sympodial in growth pattern.
Posted on: Sun, 19 Jan 2014 06:30:48 +0000
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