大戟科植物分类的数值分析

根据大戟科216个分类性状的分布，采用欧氏距离系数一类平均法对Webster(1994)广义大戟科49个族或亚族进行聚类分析。结果表明，现行的大戟科分类系统中，大多数族和亚族水平的分类基本合理，而Galearieae族的系统位置和五月茶族Antidesmeae等亚族的划分出现较大矛盾。该系统中未包含的方鼎木属Archileptopus，应与叶下珠族的Pseudolachnostylidillae亚族接近。

Numerical Analysis of the Euphorbiaceae

This paper reports the cluster analysis of Euphorbiaceae by using Euclidean distance-UPGMA method according to 216 taxonomic characters. The result shows that the combinations of most tribes or subtribes are basically rational, but the position of tribes, such as Galearieae, and some subtribes, such as the subtribe of Antidesmeae, can not be clustered together. Furthermore, the result of cluster does not support Webster's system at subfamily level. According to the result, a new genus Archileptopus which was not included in Webster's system, is closer to subtribe Pseudolachnostylidinae (Phyllantheae) than to Andrachaneae.