青冈亚属植物的地理分布

对壳斗科青冈亚属（Quercus subg.Cyclobalanopsis)植物分布区内各地区的分布作了分析和统计。通过分析，认为中国南部、西南部和中南半岛北部，即印度支那植物地区，是青冈亚属植物地理分布的分布区中心。基于其形态、现代分布和地史资料，马来西亚地区分布有许多性状较原始的类群，是青冈亚属原始类的保存中心。青冈亚属植物中有许多地区 特有种，它们的分布区很狭窄，集中分布在加里曼丹、台湾、海南和云南东部部，其产生的原因主要是地理隔离，如海峡、高山等，以及气候和地史的复杂性。青冈亚属植物还存在许多替代现象，如青冈（Q.schottkyana）、赤皮青冈（Ｑ.gilva)和黄毛青冈（Ｑ.delavayi)`、云山青冈（Q.sessifolia)和窄叶青冈（Ｑ.augustinii)为中国－日本分布式和中国－喜马拉雅分布式之间替代。

Phytogeography of Quercus subg.Cyclobalanopsis

Quercus subg. Cyclobalanopsis(Oerst.) Schneid. is an importantconstituent of broad leaved evergreen forests in subtropical and tropical regions of Asia. It contains 122 species distrbuted primarily within the Tropical Asia (Indo-Malaysia) phytogeographic province. A number of species were analyzed to develop a biogeographical and phytogenetic context for the diversity within subg. Cyclobalanopsis. Southern China and the north northern part of the Indo-Chine Peninsula show the highest species diversity and may be considered the two centers of diversity. A number of species in Malaysia were observed to have some plesiomorphic characters, and this region may be considered the center of origin and a key area of endemism. On the island of Borneo, the area of Kalimantan is richest in endemic species and the fossil species record resemble this fact. In contrast, the endemic species from Hainan and Taiwan are more derived. The endemic species of Yunnan represent a mixture of neoendemics and paleoendemics. The formation of patterns of endemism in Cyclobalanopsis is due primarily to geographical isolation and the complex history of climatic and geological changes. Also we have discussed vicariance of Cyclobalanopsis: Q.glauca & Q.schottkyana, Q.gilva & Q.delavayi, Q.sessifolia & Q.augustinii are vicariance species between Sino-Japan and Sino-Himalaya.