Plate LVI. 



Fig-. 1. Blazing- star (Liatn's spicata) prairie, Zion City, Illinois 

 candicaiis) in the background. September 4, lOOO. 



Balm of Gilead (Popitliis 



Pig. 2. The prairie invading- the pines. One of the last stages, showing old trees scarcely- 

 alive while no seedlings are present. Beach, Illinois. June 22, 1909. 



