九连山自然保护区蕨类植物区系研究

九连山自然保护区蕨类植物区系由 4 1科 86属 185种组成。区系地理成份复杂 ,科属的地理成份以热带亚热带性质为主。主要的科是鳞毛蕨科 2 8种、水龙骨科 2 2种、蹄盖蕨科 19种、金星蕨科 15种 ,4科占总种数 4 5 .4 1%。主要的属是鳞毛蕨属 15种、铁角蕨属 11种、凤尾蕨属 10种、卷柏属 9种、复叶耳蕨属 8种 ,占总种数 2 8.6 5 % ,九连山自然保护区蕨类植物区系属的地理成份可分为 14个 ,主要是泛热带 (2 6属 )和热带亚洲(13属 )成份。而种的地理成份则以亚热带山地成份为主。本区东亚成份突出 ,加上中国特有成份共占总种数的 70 .81% ,显然应是东亚植物区系的一部分。下延叉蕨、紫柄蹄盖蕨、光蹄盖蕨、剑叶卷柏和三相蕨为江西省首次发现

Studies on the Pteridoflora of Jiulianshan Nature Reserve

There are 185 species of 86 genera of Pteridophytes belonging to 41 families in Jiulianshan Nature Reserve. Floristic and geographic elements in Jiulianshan Nature Reserve are complicated. At family and genus levels, tropical-subtropical distribution types are dominant. The dominant families are Dryopteridaceae with 28 species, Polypodiaceae with 22 species, Athyriaceae with 19 species, and Thelypteridaceae with 15 species. These four families account for 45.41% of the total pteridophyte flora. The dominant genera are Dryopteris with 15 species, Asplenium with 11 species, Pteris with 10 species, Selaginella with 26 genera and Tropica Asia with 13 genera are the dominant types, accounting for 45.35% of the total gengra. At the species level, subtropical montane species are the dominant. East Asia element takes the largest proportion, including endemic Chinese elements, accounts for 70.81% of the total species. The Jiulianshan Nature Reserve is an important floristic part of East Asia ferns. Tectaria decurrens, Athyrium kenzo-satakei, Athyrium otophorum, Selaginella xipholepis and Ataxipteris sinii were found first in Jiangxi Province.