【摘要】 本文在野外调查、查阅标本、文献考证及分类处理的基础上,对江西大岗山植物区系进行分析,结果表明:⑴江西大岗山地区种子植物共约782属、1796种,包括12个分布区类型和17个亚型。亚热带至热带分布成分356属,温带成分239属;⑵中国特有成分26属,具有一定的区系残遗和特化现象;⑶大岗山地区植物区系起源古老,地理成分复杂,以热带—亚热带成分占优势,并与世界各个热带植物区系有着广泛的联系;⑷本区系间断分布类型多样,残遗植物类群丰富,在珍稀濒危种类颇多,这都与地史变迁、大陆漂移和人类活动等影响密切相关;⑸大岗山植物区系是典型的亚热带植物区系,有由热带成分向温带成分过渡的特点,成为许多热带性属的分布北界。该区具有由泛热带、亚洲热带、温带和亚热带植物区系成分在发生上是统一的。更多还原

【Abstract】 By means of collecting specimen in fields, examining specimen in herbaria and researching literatures concerned. Species and kinds of plants are rich in the Dagangshan in Jiangxi province, there are 1796 species of spermatophytes in the area, belong to 782 genera. Main floristic characters of the tropical genera in this flora can be summarized fundamentally as follows: The genera of Pantropic and Tropical Asia are dominant types and this flora is connected extensively with these floras of the tropic areas. The flora is very rich in ancient and relic plants as well as in the species of the rare and imminent extinction plants. The floristic elements are converged and transited from south to north. The geological distribution patterns and their floristic characters of Jiangxi Dagangshan were primarily analyzed. The study indicates that the Dagangshan has a typical subtropical flora and is characteristic of floristic transition from tropical to temperate composition. The flora, which possesses lots of relic, archaic, primitive and endemic elements of the Cathaysian flora, must be indigenous to the south China platform.更多还原