1142 Bibliography 



Forester (editor). White oak tree. Forester 5: 50. 1899. 



Foster, Robert C. A cyto-taxonomic survey of the North American species 



of Iris. Contr. Gray Herb. Harvard Univ. 119: 1-82. 1937. 

 Freeman, Florence L. The variations of Psoralea psoralioides. Rhodora 39 : 



425-428. 1937. 

 Friesner, Ray C. A variation of Trillium declinatum (Gray) Gleason. Proc. 



Indiana Acad. Sci. 34: 315. 1925. 

 Friesner, Ray C. The genus Trillium in Indiana. Butler Univ. Bot. Studies 



1 : 29-40. 1929. 

 Friesner, Ray C. Key to genera of Indiana ferns and fern allies. Butler Univ. 



Bot. Studies 1 : 55-60. 1929. 

 Friesner, Ray C. The genus Solidago in northeastern North America. Butler 



Univ. Bot. Studies 3 : 1-64. 1933. 

 Friesner, Ray C. Indiana as a critical botanical area. Proc. Indiana Acad. 



Sci. 46: 28-45. 1937. 

 Friesner, Ray C, and J. E. Potzger. Studies in forest ecology I. Factors con- 

 cerned in Hemlock reproduction in Indiana. Butler Univ. Bot. Studies 2 : 



133-144. 4 pi. 1932. 

 Friesner, Ray C, and J. E. Potzger. Studies in forest ecology II. The eco- 

 logical significance of Tsuga canadensis in Indiana. Butler Univ. Bot. 



Studies 2 : 145-149. 1932. 

 Friesner, Ray C, and J. E. Potzger. Climax conditions and the ecological 



status of Pinus Strobus, Taxus canadensis, and Tsuga canadensis in the 



Pine Hills region of Indiana. Butler Univ. Bot. Studies 3 : 65-84. 1934. 

 Friesner, Ray C, and J. E. Potzger. Some comparisons between virgin forest 



and adjacent areas of secondary succession. Butler Univ. Bot. Studies 3: 



85-98. 1934. 

 Friesner, Ray C, and J. E. Potzger. Contrasts in certain physical factors in 



Fagus-Acer and Quercus-Carya communities in Brown and Bartholomew 



Counties, Indiana. Butler Univ. Bot. Studies 4 : 1-12. 1937. 

 Friesner, Ray C, and J. E. Potzger. Soil acidity and hemlock reproduction 



in relic colonies in Indiana. Proc. Indiana Acad. Sci. 46 : 93-99. 1937. 

 Gates, R. R. A revision of the genus Polygonatum in North America. Bull. 



Torrey Bot. Club 44: 117-126. 1917. 

 Geddes, W. N. Some great rag weeds. Bot. Bull, (now Bot. Gaz.) 1: 14-15. 



1876. 

 Geise, Sister M. Joseph. The Indiana species of Cyperus. Amer. Midland 



Nat. 15: 241-291. 23 fig. 23 maps. 1934. 

 Gorby, S. S. Geology of Miami County. Ann. Rept. Indiana Geol. Survey 



16: 165-188. 1889. 

 Gordon, Robert B. A preliminary vegetation map of Indiana. Amer. Mid- 

 land Nat. 17: 866-877. 1936. 

 Grant, Adele Lewis. Monograph of the genus Mimulus. Ann. Missouri Bot. 



Gard. 11: 99-388. 1924. 

 Graves, E. W. Botrychiums of the Central States. Amer. Fern Jour. 21 : 



125-132. 1931. 



Graves, E. W. Botrychiums of Indiana. Amer. Fern Jour. 22 : 48-52. 1 pi. 

 1932. 



