142 



ILLINOIS ACADEMY OF SCIENCE 



Same as those under which our material grew. Next summer 

 and fall, if I can secure more material, I shall continue this 

 study in hopes of getting confirmation of the thought I have 

 advanced, or of getting new light on the subject. 



BIBLIOGRAPHY 



1. (a) Hart and Gleason: "On the Biology of the Sand Areas of Illinois." Bui. 

 of the Illinois State Labratory of Natural History, Vol. 7, pp. 137-272. 



(b) H. A. Gleason : "The Vegetation of the Inland Sand Deposits of Illi- 

 nois." Bui. of Illinois State Labratory of Natural History. Vol. 9, pp 23-174. 



2. G. P. Clinton: North American Flora. Vol. 7, part 1, pp. 4 and 12. 



3. A. S. Hitchcock; Journal of Mycology. Vol. II. p. 112, 1900. 



4. Agnes Chase: Notes on Cleistogamy of Grasses." Botanical Gazette. Vol. 

 45, pp. 135-136. 



