Distribution and floristic characteristics of wild orchids in Qiyunshan Nature Reserve.

On the basis of field investigation,there were 62 orchid species,belonging to 33 genera in Qiyunshan Nature Reserve,Jiangxi Province,in which terrestrial were dominant with 45 species to 22 genera,and 16 species to 11 genera for epiphytic and 1 species to 1 genera for saprophytic.The endemic to China and temperate species were mainly distributed in the high altitude above 1000 m;the tropical species were mainly distributed in the low altitude below 400 m.There were 21 monotypic genera,accounting for 63.6% of total genera in the Reserve.The orchid genera in Qiyunshan Nature Reserve could be divided into 11 areal-types and 2 areal-subtypes.The East Asia distribution in species level was dominant.There are 15 species endemic to China in the Reserve.Compared with neighboring regions,Qiyunshan Nature Reserve and Jinggangshan Nature Reserve had the highest similarity coefficient with 44.0%,while it had the lowest similarity coefficient(38.2%) with Lushan.