中国粗叶本属（茜草科）的植物地理研究

本文研究了中国产粗叶本属植物３０种４亚种和７变种的地理分布,划分出三个分布区类型,十二个变型和四个亚变型。根据种多度和分布特征,中国粗叶本属植物在分布上表现出与中国的热带雨林、季雨林区,南亚热带常绿阔叶林带和中亚热带常绿阔叶林带相匹配的分布规律,并受几条植物地理界线的作用。通过对地理替代类群和一些特殊分布式样的分析,显示了所谓的“田中线”和一条北起四川峨眉向南经贵州西南部至广西西部的界线对粗叶木种的分布,特别是对中国－喜马拉雅和中国－日本替代分布具有明显的作用。这导致笔者认为“田中线”作为中国－日本分布的西界而另一第线作为中国－喜马拉雅分布的东界。进一步的分析还揭示由云南南部沿缅甸、泰国向南延伸的横断山余脉既充做一条植物南－北迁移的通道又是一条中南半岛西部（印－缅）与东部（印度支那－华南）的植物地理界线。

A PHYTOGEOGRAPHICAL STUDY ON THE GENUS LASIANTHUS JACK IN CHINA

The present Paper deals with the geographical distribution of thirty species including four subspecies and seven varieties of the genus Lasianthus Jack from China, from which 3 areal types and 12 subtypes are recognized. The 3 areal types are titled as Tropical Asia (containing 15 species, 2 subspecies and 2 varieties), East Asia or Himalayas-Japan (7 species, 2 subspecies and 1 variety) and Endemic to China (8 species and 4 varieties) separately. The distributiona and species density of the Lasianthus show the exact concordance with the destributions of Chinese tropical rain forest and monsoon rain forest, southern subtropical and typical subtropical evergreen broad-leaved forests. Furthermore, some L asianthus taxa are distributionally affected by two floristic dematcation lines which were suggested by earlier authors, i. e. "Tanaka line"and"the demarcation line between Sino-Himalayan and Sino-Japanese". The "Tanaka line", which runs from northwest of Yunnan to southeast of Yunnan, roughly acts as the western boundary of the Lasianthustaxa of Sino-Japanese distribution, while the other line which runs from Omei Mt. of Sichuang at north via SE Guishou to W Guallgxi at south, acts as the eastern boundary of the taxa of Sino-Himalayan distribution. It is also suggested that the ended part of Heduang Mis., which runs from S Yunnan roughly along the border between Buram and Thailand to Malay peninsular, acts as not only a migration passage of montane plants but also a floristic demarcation line between Indochina-S China and Inaia-Burma.