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中国北部绣线菊属的花粉形态及分类学意义
刘全儒; 尹祖棠;
北京师范大学生物系
摘要:
本文用光学显微镜和扫描电镜观察了中国北部绣线菊属SpiraeaL.21种及6个变种的花粉形态,描述了外壁纹饰的形态特征,指出了外壁纹饰特征在分类上的意义。绣线菊属的花粉为球形至长球形,外壁纹饰为条网状至条纹状。外壁纹饰类型不具有属内分组意义,但对一些种类具有一定的分类价值。花粉形态支持将曲枣绣线菊S.flexuosaFisch。并入石蚕叶绣线菊S.chamoedryfoliaL.的观点[Maximowicz,C.J.(1879)、Rehder,Ai.(1940)],不同意将蒙古绣线菊毛枝变种S.mongolicaMaxim.var.tomentulosaYu提升为贺兰山绣线菊S.tomentulosa(Yu)Y.Z.Zhao[赵一之(1987)]。
关键词:  绣线菊属  花粉形态  
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