THE OPTIONS OF PLANT ORGANISMS FOR THE DEVELOPMENT OF NEW TYPES OR TYPOGENESIS IN PLANTS

The presented paper deals with the comparative morphological method (typology) combined with developmental studies as a means for understanding phylogenetic relations between different plant forms. This method becomes illuminated by two examples. The first are the phylogenetic relations between liverworts and ferns from which many follow the open repens-type. The second illuminates the much more complicated relations’between the primitive, tree-like angiosperms which returned via shrubs and herbal perennial plants to the delicate plants of the open repens-type. The angiospermic synflorescence-type plays a central role in this evolutionary pathway even if it becomes relinquished by the last step.