Cardiopteris Wall,ex Royle(1836)(=Periptery-gium Hassk.),comprising three species:C.platy-carpa,C.quinqueloba,C.moluccana,is distributed from southeast Asia to northeast Australia.Its system-atic position and relation...Cardiopteris Wall,ex Royle(1836)(=Periptery-gium Hassk.),comprising three species:C.platy-carpa,C.quinqueloba,C.moluccana,is distributed from southeast Asia to northeast Australia.Its system-atic position and relationship are controversial.The genus has been assigned to Olacaceae[2]or Icacinaceae Blume conceived it as a type of monogeneric family3.and now most taxonomists place it in the order of Celas-trales as a distinct family with affinities to Icaci-naceae(4-6),However,Cronquist ever thought that the genus was insufficiently studied and might prove to be misplaced in the Celastrales4.Recently,Takhtajan considered it as an independent order,while it is in an uncertain position based on morphological or molecular data[8].It is clear that the systematic position of Car-diopteris can not be detemmined until it has been more carefully studied.Comparative embryology has been an important approach in revealing the relationship of taxa at familiar or higher levels.The embryological investiga-tions reported in this paper were carried out to provide more information on Cardiopteris classification.Its embry-ological features were thoroughly observed:Cardiopteris has a new type of embryo sac,whose eg apparatus sits in the chalazal end.展开更多
文摘Cardiopteris Wall,ex Royle(1836)(=Periptery-gium Hassk.),comprising three species:C.platy-carpa,C.quinqueloba,C.moluccana,is distributed from southeast Asia to northeast Australia.Its system-atic position and relationship are controversial.The genus has been assigned to Olacaceae[2]or Icacinaceae Blume conceived it as a type of monogeneric family3.and now most taxonomists place it in the order of Celas-trales as a distinct family with affinities to Icaci-naceae(4-6),However,Cronquist ever thought that the genus was insufficiently studied and might prove to be misplaced in the Celastrales4.Recently,Takhtajan considered it as an independent order,while it is in an uncertain position based on morphological or molecular data[8].It is clear that the systematic position of Car-diopteris can not be detemmined until it has been more carefully studied.Comparative embryology has been an important approach in revealing the relationship of taxa at familiar or higher levels.The embryological investiga-tions reported in this paper were carried out to provide more information on Cardiopteris classification.Its embry-ological features were thoroughly observed:Cardiopteris has a new type of embryo sac,whose eg apparatus sits in the chalazal end.
