The morphological nature of the open dichotomous leaf venation ofKingdonia andCircaeaster and its systematic implication

被引:8
作者
Ren Yi
Xiao Ya-Pin
Hu Zheng-Hai
机构
[1] Northwest University,Biology Department
[2] Shaanxi Normal University,Biology Department
关键词
Morphological nature; Systematic implication; Variation; Venation;
D O I
10.1007/BF02512174
中图分类号
学科分类号
摘要
After the further studies on the open dichotomous leaf venation ofKingdonia andCircaeaster, we considered that the venation of these genera is incomparable to that of some gymnosperms such as Ginkgoaceae, and is a degenerated characteristic in the morphological nature. We also considered that this characteristic is very important on determining the systematic relationship between these genera and other members of Ranunculales (sensu Takhtajan 1980), but its implication in the phylogeny of angiosperms was overemphasized.
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页码:225 / 230
页数:5
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