The plant species diversity in southern Tibetan Plateau

本研究旨在阐明青藏高原南缘高等植物的多样性和系统发育关系。1998年，我们调查了位于高原最南端的尼泊尔东部的阿伦河地区，以及位于高原最东端的中国的横断山。在尼泊尔，研究主要集中在以下属：风毛菊属、Meconopsis属、虎耳草属、马先兰属和杜鹃花属。1)野外细胞分类学研究，2)形态研究，3)种群多样性研究，4)分子系统发育研究，5)垂直分布与相关分类群的比较。在《中国》一书中，我们主要研究了与尼泊尔相同的几个属：委陵菜属、灯心草属、短叶委陵菜属、虎耳草属、马先兰属。作为本研究的结果，我们澄清和实施了以下内容：1)确认该地区分布有24种10变种，其中多叶委陵菜为一新种；2)在灯笼属植物中发现了两个新种，即灯心草和节节委陵菜；3)对该地区的虎杖属植物进行了统计。实地调研后，对收集到的资料进行分析。作为结论，发表了一份报告。

This research aimed to clarify the diversity and phylogenetic relationship of the higher plants distributed in southern margin of the Tibetan Plateau. In 1998 we surveyed the Arun River Region in eastern Nepal situated in the southernmost margin of the Plateau, and also the Hengduan Mountains in China situated in the easternmost margin of the Plateau.1. In Nepal the research is focused on the following genera, Saussurea, Meconopsis, Saxifraga, Pedicularis and Rhododendron. 1) We collected the materials for cytotaxonomical studies in the field, 2) for morphological studies, 3) for population diversity, 4) for molecular phylogenetic studies, and 5) for the vertical distribution comparing with the related taxa.2. In China the research is focused on the following genera, Potentilla, Juncus, Meconopsis, Saxifraga, Pedicularis, as done in Nepal. As the results of this research we have clarified and implemented the followings ; 1) for Potentilla it is confirmed that 24 species and 10 varieties are distributed in this region, one of which is a new species, Potentilla polyphylloides, 2) two new species are found in Juncus, Juncus gunggae and J.tradiphyllus, 3) for Saxifraga an enumeration of this region is published.3. After the field research the collected materials are analyzed.4. As a conclusion a report is published.