海南省陵水河流域植物区系研究

为了更好地保护海南省陵水河流域植物资源，在广泛查阅文献与外业调查的基础上，利用样方调查的方法对该流域的植物区系特征进行研究。结果表明：（1）陵水河流域共记录到维管植物458种及种下单位，隶属于127科360属，其中蕨类植物19科23属24种，裸子植物3科3属3种，被子植物105科334属431种；（2）种子植物中含10种以上的科有10个，含4种以上的属有8个；（3）种子植物科和属分别对应有9个和14个分布区类型、7个和9个变型，且二者的泛热带成分分别占非世界分布的53.49%、29.32%；（4）中国特有属数量稀少，只有3个，占非世界属总数的0.82%；表明陵水河流域植物资源丰富，被子植物居首，科、属分化程度比较高，区系优势现象较明显，植物分布类型多样化，地理成分复杂，具有显著的热带、亚热带性质和温带过渡性质；（5）陵水河流域记录到国家级、省级保护植物15种。对系统了解流域内植物起源和发展变迁进程、植物地区区域特征和演化具有重要的科学价值。

Study on the Flora of Lingshui River Basin in Hainan Province

In order to protect the plant resources of Lingshui River Basin more better in Hainan Province,so there is study of the basin ’ s flora using quadrat based on lots of consultation of literatures and field investigations.The result demonstrated that：（1） there were recorded vascular plants 458 families and infraspecies,contained vascular plants 127 families,360 genera：pteridophytes 19 families,23 genera,24 species;gymnosperms 3 families,3 genera,3 species;angiosperms 105 families,334 genera,431 species.（2） There were 10 families of spermatophyte with more than 10 species,8 genera of spermatophyte with more than 4 species.（3） Areal-types of families and genera of spermatophyte were 9 and 14,variant were 7 and 9,pan-tropical elements of the two occupied 53.49% and 29.32% of the non-world distribution.（4） Chinese endemic genera was little,only 3,0.82% of the total non-world genera;It showed that there were plentiful plant resources in Lingshui River basin.Angiosperms had an absolute advantage over the others,which had a high degree of differentiation and a phenomenon of superior flora,of which dispersion patterns were varied and geographical elements were complicated,which had a significant tropical and subtropical nature and Temperate transitional nature.（5） There were 15 kinds protected plants of country and province.It was scientific value for knowing the plant ’ s origin and development of the river.