缺齿藓(真藓科)的形态特征和地理新分布

Morphological Characteristics and Geographical Distribution of Mielichhoferia mielichhoferiana(Bryaceae,Bryophyta)

通过对内蒙古自治区与宁夏回族自治区交界处——贺兰山苔藓植物的调查采集和室内鉴定,发现了缺齿藓(Mielichhoferia mielichhoferiana)的一个新的地理分布记录。该文讨论了缺齿藓的形态特征和地理分布,将其与喜马拉雅缺齿藓、日本缺齿藓和中华缺齿藓进行了比较分析,并提供了该种的图版和中国缺齿藓属的分种检索表。该种的发现不仅丰富了中国缺齿藓属的研究资料,同时也说明了贺兰山的植物区系成分与喜马拉雅成分具有一定的关联。

Based on detailed field investigation, collection and identification of bryophytes from the Helan Mountain which was believed to be located at the border of the Inner Mongolia Autonomous Region and the Ningxia Hui Autonomous Region,we discovered a new geographic distribution record of Mielichhofe- ria mielichhoferiana. Morphological characteristics and geographical distribution of M. mielichhoferiana were discussed. Meanwhile,the comparsion among M. rnielichhoferiana and its related species,M, himal- ayana,M, japonica and M. sinensis,was also conducted. The key to the Chinese species of Mielichhoferia and the illustrations were provided. Not only did the research largely enriches our study information on Bryaceae in China, but also demonstrated the relationships between Helan Mountain area of floristic elements and the Himualayan components.