试论单子叶植物的原始类群

On the Original Group of Monocotyledons

本文从被子植物系统分类理论观点出发 ,结合植物分子系统学的最新研究成果 ,综合分析和讨论了单子叶植物的原始类群 .结果认为 ,单子叶植物是一个单元起源的自然类群 ,其原始类群具有单沟型花粉 ,离生心皮 ,草本或半草本 ,陆生等特征 ;泽泻目 (Alismatales)

The origin of monocotyledons is synthetically analyzed and studied by using latest attainment of Plant Molecular Systematics and the theory of systematic classification of angiosperms in this paper. The results are as follows: monocotyledons is a monophyletic natural group and its characters of original group are moncolpate pollen, apocarpel, herb or semiherb, terrestrial habit et al. Alismatales is possessed of more original characters in recent monocotyledons.