江西井冈山自然保护区药用种子植物区系研究

Study on flora of the medicinal seed plants in Jinggangshan Nature Reserve

江西省井冈山自然保护区共分布有药用种子植物 1 67科 ,含 5 2 9属 1 1 2 5种 (包括变种、变型 )。 1 67科可划分为 9个分布区类型 ,其中热带性科为 81科 ,占总科数的 63 .78% (除世界分布 ) ,温带性科为 46科 ,占总科数的 3 6.2 2 % ,热带性科占优势。 5 2 9属可划分为 1 4个分布区类型和变型。热带分布及其变型共 2 2 8属 ,占47.80 % (除世界分布型 ) ,其中泛热带分布及其变型共 1 0 8属 ,占总属数的 2 2 .85 % ,占热带分布属的 5 3 .5 1 % ,是本区中占主导地位的区系成分。温带分布及其变型共 2 3 8属 ,占 49.89%。中国特有属含 1 1属 ,占总属数的2 .3 1 %。该区系具有各种区系成分并存、区系中古老性成分与新特有成分并存、与世界各地联系广泛而复杂的特征。在植物区系的分区上 。

There are 1 125 species(including varieties and forms)of 529 genera in 167 families. Among 167 families,81 families belong to tropic areal-types,accounting for 63.78% in total(excluding cosmopolitans);46 families show a temperate areal-type,with 36.22% of the total. At the level of families,the tropic aeral-type holds a dominant position. The genera can be divided into 14 areal-types and forms,in which the Tropic one accounts for 47.80% in total with 228 genera. The pantropic which is the dominant floristic element in this medicinal seed flora has 108 genera accounting for 22.85% in total and 53.51% in Tropic ones respectively. Temperate areal-type and forms have 238 genera,accounting for 49.89% in total. The China-endemic accounts 2.31% with 11 genera. All kinds of floristic elements coexist in the Nature Reserve. There are both far ancient elements and new or special ones. It has wide and complex relationship with the other regions in the world. The flora of Jinggangshan is a transitional zone from subtropic to temperate.