中国无患子科植物的叶脉形态及其系统学意义

doi:10.7677/ynzwyj201413209

摘要/Abstract

摘要：

对国产狭义无患子科25属27种植物的叶脉形态特征进行了研究报道。结果表明：叶脉均属于羽状脉类型，其中多数为曲行羽状脉，部分为直行羽状脉；叶缘有全缘、具齿和深裂3种类型；二级叶脉具有分支和不分支两种类型；大部分种类具二级间脉，少数不具间脉或间脉不明显；多数种类的三级脉为结网型和贯串型并存；网眼的发育有完善和不完善2种类型；盲脉有简单、具分支和无盲脉3种类型。叶脉形态研究结果支持文冠果亚科以及广义鳞花木属概念，观察发现龙眼属、荔枝属与韶子属从脉序特征方面表现出较近的亲缘关系，编写了国产无患子科叶片脉序特征检索表。

关键词: 无患子科, 七叶树科, 槭树科, 叶脉形态, 系统学意义

Abstract:

Leaf venation of 27 species representing 25 genera of Sapindaceae (sstr.) of China was investigated for the first time. The pinnate venation pattern in most species is either camptodromous, or craspedodromous. Three types of leaf blade margin were observed, ie., entire, toothed and partite. The secondary veins are branched or unbranched. Most species have intersecondary veins. The tertiary veins of most species are reticulate and percurrent. The areoles are regular or irregular. Veinlets are simple, branched or absent. The delimitations of Xanthoceroideae and Lepisanthes sensu lato are supported by leaf venation characters. The close relationships among Dimocarpus, Litchi and Nephelium are supported by the evidence from leaf venation. A key to the species of Sapinaceae based on leaf venation characters is presented.

Key words: Sapindaceae, Hippocastanaceae, Aceraceae, Leaf venation, Systematic significance

中图分类号:

Q 944
Q 949

曹丽敏, 王志新, 曹明, 刘健晖, 林琼, 夏念和. 中国无患子科植物的叶脉形态及其系统学意义[J]. Plant Diversity, 2014, 36(04): 419-432.

CAO Li-Min, WANG Zhi-Xin, CAO Ming, LIU Jian-Hui, LIN Qiong, JIA Nian-He. Leaf Venation and Its Systematic Significance in Sapindaceae of China[J]. Plant Diversity, 2014, 36(04): 419-432.

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