Abstract: Twelve species in the genus Nitraria around the world are verified and revised through literatural studies. The phylogeny in the genus is touched based on the structure of pericarp and its evolutionary trend,pollen morphology,and distribution pattern of different species. A classification system of the genus is proposed. The key to sections and species in the genus is achieved .The distribution maps both in China and the world are provided in the present paper according to gegraphic distribution of the genus.

Key words: Nitraria, Classification, Systematics

摘要： 在回顾白刺属(Nitraria L.)研究历史的基础上，对全球所产白刺属的12种植物作了详细的考证和系统整理。根据果皮结构及演化趋势，花粉形态及分布区等方面的研究资料，探讨了属内种间的系统发育，提出了属下的分类系统，在此系统下编制出分组及分种检索表。根据其地理分布，绘制了白刺属植物的中国及世界分布图。

关键词: 白刺属, 分类, 系统