| Summary: | Orchid has the very high variabilities. Orchid represent the biggest family of plant flower reached 7-10 % including ±1200 gender, more than 50.000 natural species and more than 100.000 hybrid species. In Indonesia, there are ±5000 natural species, 406 species there are in north Sumatra. Orchid own the very wide spreading start from arktic continent up to antartic and abundance in tropical area. Data of world conservation of monitoring center ( 1995) indicating that compared to other plant flowers in Indonesia, orchid accept the highest destruction threat as much 203 type (39%). Progressively the hoisterous of settlement development, plantation, and also forest ruining have quickened the experienced orchid species destruction. A lot of orchid species have totally disappeared before have time to describe and documented. To be knowable orchid existence somewhere better, needed an research in the form of exploration, inventarisation, and identification. The result of exploration founded 112 orchid species mustered in 38 gender. from the amount found 78 species of epiphytic orchid (24 gender), 32 species of terrestrial orchid (18 gender) and 2 species of saprofit orchid (2 gender). 153 Halaman Skripsi Sarjana
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