120 



DICOTYLEDENOUS ANGIOSPERMS 



our northern climate show in cross-section circles of large 

 vessels formed in the spring when rapid conduction of water 



FIG. 70. Indian Tobacco (Lobelia inflata). 1, Roots; 2, stem; 3, leaves 

 alternately arranged; 4, lateral flowering branch; 5, terminal flowering 

 branch; 6, inflated persistent calyx in which the fruit develops. 



