中文摘要：

阿拉善荒漠区地处典型的内陆干旱区，属温带荒漠气候，是亚非大陆戈壁荒漠区的东翼。本文对阿拉善荒漠区种子植物区系的组成、特点及性质进行了分析，并与邻近地区的植物区系进行了比较分析。经统计本区有种子植物（包括部分栽培种）87科377属1091种，野生种子植物82科367属1073种。主要结论为：1）植物种类较丰富；2）特有成分突出，共有中国特有属14个，其中当地特有属5个，分别是：四合木、绵刺、革苞菊、连蕊芥、百花蒿，多为单种属或寡种属；3）区系起源古老；4）与蒙古、古地中海、华北或东亚以及青藏高原植物区系关系密切。

英文摘要：

The Allah desertis in the eastest of Asia - Africa desert. The component, characteristics and nature of the flora of seed plants in Allah desert were analyzed, and the relations with the near areas flora were compared. According to the statistics, the area has region 87 families, 377 genera 1091 species （ including some cultivated species ） ; There are 82 families 367 genera 1073 species of wild seed plants. There are some conclusions in following： 1 ） It is abundant in floristic component; 2） there are 14 endemic genera of China, 5 local endemic genera, such as Tetraena, Potaninia, Tugarinovia, Sgnsternon, Stilpnolepis, and they are all monotypic and oligotypic genera; 3）The origin of flora is ancient： 4） It is closed to the flora of Mongolia , Tethys, East Asia or North China, Qinghai - Xizang Plateau.