%0 Journal Article
%A CAO Tong
%A GUO Shui-Liang
%A WU Qian-Qian
%A YU Jing
%T Geographical Distribution Pattern of <em>Macromitrium</em> in the World and Its Biogeographical Significance
%D 2017
%R 10.7525/j.issn.1673-5102.2017.02.002
%J Bulletin of Botanical Research
%P 164-173
%V 37
%N 2
%X The genus <em>Macromitrium</em>(Orthotrichaceae, Bryophyta) is an important taxon in bryological systematics, ecology and biological conservation. On the basis of our taxonomical revision of the genus, we got the distribution data of 274 species of the genus in 14 geographical unites(suggested by &quot;Index Muscorum&quot;) in the world.By using Clustering Analysis and Detrended Correspondence Analysis(DCA), we got a dendrogram and a three-dimensional scatter plots to reveal the distribution pattern of the genus visually. The results showed a distinctive floristic differentiation of <em>Macromitrium</em> among As2, Oc, As3-4, Afr2-3-4, Am2-3-4-5, and Austr1-2, with highest diversity in Tropical Asia and Tropical America. Except <em>M.microstomum</em>(Hook.&amp; Grev.) Schw&auml;gr., all other species were recorded from a single or a few geographical unites. Among different global regions, <em>Macromitrium</em> differentiated not only in its floristic elements, but also in their morphological characters. We discussed the systematic and biogeographical significances of the genus according its global distribution pattern.
%U https://bbr.nefu.edu.cn/EN/10.7525/j.issn.1673-5102.2017.02.002