GEOGRAPHIC DISTRIBUTION OF ANGIOSPERMS 271 



7. The sympetalous families of world-wide distribution are 

 the Compositae, Labiatae, and Plantaginaceae. 



8. The great north temperate families are the Borragina- 

 ceae and Serophulariaceae. 



9. The characteristic boreal group is the Ericales, a group 

 that finds no parallel among the Monocotyledons and Archi- 

 chlamydeae. 



