Aspects of evolutionary differentiation of theHamamelidaceae and the LowerHamamelididae

  title={Aspects of evolutionary differentiation of theHamamelidaceae and the LowerHamamelididae},
  author={P. K. Endress},
  journal={Plant Systematics and Evolution},
New investigations on the flower and fruit structure of extantHamamelidaceae and other LowerHamamelididae together with new finds of fossil flowers and seeds from the Upper and Lower Cretaceous provide the outline of an increasingly more differentiated picture of the early evolution of the subclass. Three patterns of valvate anther dehiscence are recognized in the subfamilyHamamelidoideae (and the subclassHamamelididae). The basic (plesiomorphic) type within theHamamelididae has 2 valves per… Expand

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