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INTRODUCTION TO PLANT GEOGRAPHY 



(6) Mediterranean — various types including the European and 

 African shores of the Mediterranean Sea, or the Mediterranean 

 basin and some distant continent — as in the species of Platamis 

 (Plane-trees, or Buttonwoods), indicated in Fig. 54. 



Fig. 56. 



-Map showing range of the genus Jovellana (Scrophulariaceae) (South 

 Pacific distribution). (After Hutchinson.) 



Fig. 57. — Map showing range of the genus Asclepias (Milkweeds, or Silkweeds) 

 (South Atlantic, etc., distribution). (After Good.) 



(7) Tropical — distributed in two or more separate tropical regions 

 such as occur within the Old World (palaeotropical discontinuity) 

 or the New World (neotropical discontinuity) or both (pantropical 

 discontinuity). Among the various minor types, two are illustrated 

 in Fig. 55, one being of a genus and the other of a family. 



(8) South Pacific — distributed at least in South America and New 

 Zealand, as in the case of the genus Jovellana illustrated in Fig. 56, 

 and often also in other Pacific islands and in Australia. 



