贡嘎山蕨类植物区系的特点

贡嘎山蕨类植物区系共合 40科，93属，399种。最主要的是耳蕨属 Polystichum，鳞毛蕨属Dryopteris，蹄盖蕨属Athyrium以及水龙骨科Polypodiaceae等系统演化上较高级的类群，所含的种主要是喜马拉雅和中国西南当地分化的种；其特有成分多为新特有属，可认为它是随青藏高原隆起而形成的较年青的蕨类区系。热带属在本区数量多而种类少，在山上部可与北温带种类并存。贡嘎山处于蕨类物种东、西分布区界线的密集地段，可视为耳藉一鳞毛蕨类植物区次级区分的东、西界线。

A REVISION OF CERCIS FROM HENAN

With the electrophoretic technique, we studied the Peroxidas (PER),Catalase (CAT), Esterase (ES), Amylase (AA), Citric acid dehydrogenase (CDH) and Glutemate dehydrogenase (GDH) in leaves of 41 plants from 5 populations with different altitudes and habitats of Deutzia multiradiata W.T.Wang which is endemic to Mt. Jinfo of Nanchuan, China. The bands of those isozymes are scored to construct the two-state data matrix which is caculated by Jaccard, Sokal-Sneath and Sokal-Michener association coefficients clustered with UPGMA and WPGMA respectively. The result reveals that individuals from the same populatin are highly homogenous genetically interprated from bands of the six isozymes, while individuals from the different popula- tions show highly dissimilarities in isozyme bands.