Bui. 107, Bureau of Plant Industry, U. S. Dept. of Agriculture. 



Plate VII. 



Fig. 1.— Stoneroot (Collinsonia 

 canadensis'. 



Fig. 2.— Queen-of-the-Meadow 



lEUPATORIUM PURPUREUMi. 



Fig. 3.— Elecampane i Inula helenium). 



Fig. 4.— Echinacea iBrauneria 

 angustifoliai. 



