海南岛石灰岩地区植物区系研究概况

General State of Knowledge of the Vascular-plant Flora of Limestone Regions on Hainan Island

在实地调查和资料收集的基础上,简单回顾海南岛石灰岩地区植物区系的研究历史,并简要介绍了作者的一些研究结果,包括区系种类组成、区系与群落中的优势科和表征科、特有植物和珍稀濒危植物的数量特征等。最后,提出一些海南岛石灰岩地区植物区系研究中仍需进一步解决的问题。

Based on field investigations,literature and specimens collected,the authors briefly reviewed the study of the flora of limestone regions in Hainan.Results are presented,including the floristic composition,chara- cteristics,endemism,and rare and endangered plants of limestone regions in Hainan.A total of 1346 vascular pl- ant species,including two new species and 23 species new for Hainan,axe hitherto known from limestone regions of Hainan,and the floral composition is most similar to those of Yulman' s Xishuangbanna and those of Vietnam.The karst limestone outcrops at Exianling of Dongfang and Changjiang Counties,and the Xianan Stone Forest of Baoting County are of the highest conservation significance.Research gaps are presented for the study of vascular flora of li- mestone regions in Hainan.