九连山自然保护区兰科植物资源分布及其特点

九连山自然保护区是江西兰科植物集中分布的地区之一。据调查,保护区有30属63种,以地生兰占优势,有20属（45种）;附生兰9属（15种）;腐生兰2属（3种）。其中单种属16个,占九连山兰科植物总属数的53.3%。与邻近地区相比,九连山自然保护区兰科植物与广东南岭自然保护区共有属最多（24属）,与甘肃麦积山共有属最少（11属）。九连山自然保护区兰科植物属的地理成分可划分为9个分布型和2个变型,种的分布以温带分布为主体,以东亚分布为核心,占总种数的38.1%。

Orchid Resource Distribution and Characteristics in Jiulianshan Nature Reserve

Jiulianshan Nature Reserve is located in Jiangxi province and has an abundance of orchid plants.Our investigation showed there are 63 orchid species belonging to 31 genera in the reserve.Among them,terrestrial were dominant,with 21 genera（45 species）,followed by epiphytic with 9 genera（15 species）,and saprophytic with 2 genera（3 species）.There were 16 monotypic genera,which accounts for 55.2% of the total genera in the reserve.Compared with neighboring regions,Jiulianshan Mountain Nature Reserve and Nanling National Nature Reserve have the most number of orchid genera in common（24 genera）,while the Scenic Area of Maijishan has the least number（11 genera）.The geographical elements of orchid genera in Jiulianshan Mountain Nature Reserve can be divided into nine types and two sub-types.The main species distribution was in Temperate areas,with East Asia accounting for 42.9% of the total number of species.