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山茱萸科花粉形态研究
王开运; 陈新露;
1.西北林学院;2.西北农业大学 陕西杨陵;3.陕西杨陵
摘要:
本文应用光学显微镜与扫描电子显微镜观察了山茱萸科Cornaceae4属(按照Wangerin1910年的概念)27种花粉形态,结果如下: 1.根据花粉特征,支持把青荚叶属Helwingia,桃叶珊瑚属Aucuba,鞘柄木属Torricellia三属分别独立成科的观点。 2.梾木属Cornus可明显区分为两种类型,即梾木型和四照花型;梾木型还可再分为三个亚类型.即灯台树亚型,长圆叶梾木亚型和梾木亚型。 5.支持四照花属应从梾木属中分出而独立成属;而在四照花属Dendronbenhamia下设立北美四照花亚属Subg. Apocarpea和四照花亚属Subg. Syncarpea;在梾木属下设立梾木亚属Subg. kraniopsis, 灯台树亚属Subg.Masomora等亚属的观点。 4.建立了—新亚属——长圆叶梾木亚属。
关键词:  分类系统  山茱萸科  花粉形态  新亚属  
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