Continental Drift now offers a strong set of constraints for hypotheses of evolution and past migrations of floral units. Such as development of EN studies in this regard Paleogeography and climate states provide a -- Use of the past configuration gives a series of possible Custo allowing us to analyze patterns discerned in the present modern floras. [illegible] - Invertible Mulemb of planation thus provided should only be considered as a set of plausible hypotheses but not as compelling evidence of past dislocation of taxa. These hypotheses do allow -- stimulate research into possible explanations and compelling evidence of past distributions only from the