Vicarism and biogeography on the flora of the Ryukyu and Amami Islands, S Japan

为了探讨琉球和阿美群岛植物区系的形成，从生物地理学的角度对琉球藻属(虎耳草科-绣球亚科)进行了研究。在这些岛屿上，描述了德伊特西亚的四个特有分类群。这四个物种被认为是显性的，并联合成一个物种，即D.naseana。此外，我们还清楚地看到，鼻翼盘藻与来自中国东部的盘尾盘藻和来自日本本土的盘尾盘藻有密切的亲缘关系。据认为，这三种细菌起源于一个共同的生殖器，而纳氏假丝核菌和黄氏假丝核菌比结痂假丝核菌更为原始。讨论了鼻念珠菌的离散性和衍生性。

In order to discuss about the formation of the flora of the Ryukyu and the Amami Islands, the genus Deutzia (Saxifragaceae-Hydrangeoideae) was investigated from vicariant biogeographic point of view. From the islands four endemic taxa of Deutzia were described. These four were considered to be conspcific and united into a single species, D. naseana. It also became clear that D. naseana is closely related to D. faberi from east China and D. scabra from Japan proper. It was thought that these three were derived from a common ancester and that D. naseana and D. faberi are more primitive than D. scabra. Vicarism vs. dispersion and derivation of D. naseans were discussed.