摘要
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.
报道心翼果属(CardiopterisWall.exRoyle)一种新的胚囊类型:胚珠无珠被、直生、薄珠心。成熟胚囊中,卵器位于合点端,反足细胞位于珠孔端。这样的胚囊在所有进行过胚胎学研究的被子植物中系首次发现。合子和胚胎也位于合点端。心翼果属的这一新特征无疑是特异性的。
基金
中国科学院重点项目:东亚南部界面被子植物关键类群的系统学与地理学研究
