金叶子属分类、分布与演化趋势的研究

<正> 金叶子属(Craibiodendron W.W.Shmith)是杜鹃花科中的一个小属,含6种,分布于亚洲东南部,其现代分布中心在我国的云南南部。在杜鹃花科中,金叶子属与米饭花属(Lyonia Nutt.)、马醉木属(Pieris D.Don)有密切的关系。作者在完成(中国植物志)、(云南植物志)、(西藏植物志)该属工作过程中,查阅了近500号本属植物标本,并对分布于云南境内的本属植物进行了野外考察,认为有必要对本属的分类、分布及演化趋势进行讨论。现将研究心得发表如下。

A STUDY ON CLASSIFICATION,DISTRIBUTION AND EVOLUTIONARY TRENDS OF CRAIBIODENDRON

Craibiodendron W. W. Smith is a small genus in Ericaceae. It containssix species and is limited to southeastern Asia. Its center of distribution is insouth Yunnan, China. These species are C. yunnanense W. W. Smith, C. scleranthum(Dop) Judd, C. kwangtungense S. Y. Hu, S. stellatus W. W. Smith, C. vietnamenseJudd and C. henryi W. W. Smith. In this paper the author briefly reviews the history of this genus. Genericrelationship within the Andromededoideae (Drude) E. Busch have been studied.Based on comparison of morphology and anatomy, the genus Craibiodendron isrelated closely to Lyonia Nutt. and secondarily to Pieris D. Don within Androme-dedoideae. In this paper, the author not only describes the characteristics of the genus,but also records the distribution down to counties level. A key to species is provided.In addition, the plant geography of the genus is discussed. By cladistic analyses andmethod of plant morphology-plant geography, the evolutionary trend of species inCraibiodendron may be shown as in fig. 1. Southeastern Yunnan may be the originand also the center of recent distribution of this genus.