江西省铜鼓县木本植物区系的初步研究

A Preliminary Study on the Flora of Woody Plants in Tonggu County,Jiangxi Province

根据本次调查统计．铜鼓具有野生本本植物536种（含种下等级，下同），隶属于228属92科．其中裸子植物5科7属9种，被子植物87科221属527种。本文通过分析该县木本植物区系的地理成分和区系特征，指出本区系具有地理成分的复杂性、区系的过渡性和古老性以及地理分布的特有性4个特点。在与邻近地区木本植物区系的关系比较上，本地区与庐山、黄山、武夷山、井冈山、龙栖山、星斗山、“二南”属的相似系被依次为87．5％、81．4％、79．8％、78．2％、76．8％、72．8％和70．7％。本区系属华东植物地区，且位于华中、华东两大区系的过渡地带上，具有中亚热带中部北缘的区系性质。

According to preliminary statistics. there are about 536 species(including subspccies, varicties and forms) of wild woody plants in this county,belonging to 228 gcnera and 92 families.include ing 9 species in 7 genera of 5 families of Gymnosperms and 527 species in 221 gcncra of 87 fami lies of Angiosperms. The paper suggestes that the flora have four characteristies of complexity of geographical elements. transition and archaism of the flora, endemic of geographical distribution by analysing geographical elements and floristic characteristics of the woody plants flora. By con trasting and analysing the floristic relationships between Tonggu county and adjacent rcgion,the similarity coefficient of genera between this regional flora and Mt. Lushan,Mt. Huangshan,Mt.Wuyi. Mt. Jinggang, Mt. Longxi, Mt. Xingdou,Quannan and Longnan counties are in sequence order of 87. 5 %, 81. 4 %, 79. 8%, 78. 2%, 76. 8%. 72. 8% and 70. 7% respcctively. This flora bclongs to the flora of East China and is situated in the zone of transition between the flora of Central China and East China. It has the floristie characteristics of the centre of Middle Subtropi cal by north.