. Morphology of gymnosperms. Gymnosperms; Plant morphology. 176 MORPHOLOGY OF GYMNOSPERMS When the numerous detached paleozoic seeds were grouped as radiosperms and platysperms (12, 14), it was supposed that the latter, at least, belonged to the Cordaitales, because such as had been definitely referred to the group were of the more or less flattened type. However, since the discovery that certain of the CycadofiUcales, as Aneimites and Pecopteris Pluckenetii, bore seeds of the platysperm type, it is evident that the ref- erence of any seed to Cycadofilicales or Cordaitales must await the disco
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