中文摘要：

岳麓紫菀（Aster sinianus Hand.-Mazz.,菊科紫菀族）为多年生草本,特产于中国湘赣毗邻地区。在对其整个分布区进行野外采集和生境观察时,发现了2个新的分布地点,同时确认其已在模式产地湖南省长沙市岳麓山灭绝。该研究将岳麓紫菀从浏阳市沙市镇回迁至岳麓山,以期恢复模式产地的居群。形态学研究表明,现有文献对该种的描述多处不准确,如对基生叶、株高、茎下部叶、托片和海拔等的记载。基于形态性状,讨论了岳麓紫菀的系统学地位,并首次报道了该种的核型特征：岳麓紫菀为二倍体,核型为2n=2x=16m＋2m（SAT）,属于1A型。该研究结果为岳麓紫菀的分类地位的修订和物种保护提供了重要的资料。

英文摘要：

Aster sinianus Hand .-Mazz .（ Asteraceae：Astereae ） is a perennial endemic herb in the adjacent areas of Hunan and Jiangxi Provinces ,where two new distributions of A .sinianus Hand .-Mazz were found through the field acquisition and habitat observation .And this species has been confirmed further to have become extinct in its type-locality ,the Yuelu Mountain of Changsha ,capital of Hunan Province . Hence ,to recover the populations in the type-locality ,several A .sinianus plants were transplanted back to the Yuelu Mountain from Shashi Town of Liuyang City .The morphological studies show that in previ-ous literatures there are some inaccurate descriptions of this species ,such as the descriptions of its basilar leaves ,plant height ,stem leaves ,paleates and altitude ,etc .Based on the observation of its morphological traits ,this paper studied the systematic status of A .sinianus ,and its karyotype was reported for the first time as well .The research results show that A .sinianus is diploids with a karyotype formula 2n=2x=16m＋2m（SAT） ,belonged to 1A type .The paper provides some valuable information for the revision of its taxonomic status and the species conservation .