XVI 



Bull. Ohio Univ. 



Ohio State University. Columbus. Bulletin. 



Bull. Pacific Univ. 



Pacific University. Bulletin. Forest Grove, Oregon. 



Bull. Penn. Dept. Agr. 



Pennsylvania Department of Agriculture. Bulletin. 



Bull. S. Dak. Exp. Sta. 



South Dakota Agricultural College and Experiment Station. Brook- 

 ings. Bulletin. 



Bull. Soc. Bot. Belg. 



Societe royale de Botanique de Belgique. Bulletin. 



Bull. Soc. Bot. Pr. 



Societe Botanique de France. Paris. Bulletin. 



Bull. Soc. Myc. Fr. 



Societe Mycologique de France. Paris. Bulletin. 



Bull. Tex. Exp. Sta. 



Texas Agricultural Experiment Station. Bulletin. 



Bull. Torr. Bot. Club. 



Torrey Botanical Club. New York. Bulletin. 



Bull. Univ. Iowa. 



Laboratories of Natural History of the State University of Iowa. 

 Bulletin. 



Bull. U. S. Agr. Div. Bot. 



United States Department of Agriculture, Division of Botany. Bul- 

 letin. 



Bull. U. S. Agr. Office Exp. Sta. 



United States Department of Agriculture, Office of Experiment Sta- 

 tions. Bulletin. 



Bull. U. S. Agr. PL Industry. 



United States Department of Agriculture, Bureau of Plant Industry. 

 Bulletin. 



Bull. U. S. Agr. V. P. P. 



United States Department of Agriculture, Division of Vegetable 

 Pathology and Physiology. Bulletin. 



Bull. U. S. Agr. Veg. Pathol. 



United States Department of Agriculture, Division of Vegetable 

 Pathology. Bulletin. 



Bull. Wash. Exp. Sta. 



Washington Agricultural Experiment Station. Pullman. Bulletin. 



Bull. Wash. Lab. 



Washburn Laboratory of Natural History. Topeka, Kans. Bulletin. 



Bull. W. Va. Exp. Sta. 



West Virginia Agricultural Experiment Station. Morgantown. Bul- 

 letin. 



