XV 



Bull. Herb. Bois. 



Herbier Boissier. Geneva. Bulletin. 



Bull. Idaho Exp. Sta. 



University of Idaho Agricultural Experiment Station. Moscow. 

 Bulletin. 



Bull. 111. Lab. 



Illinois State Laboratory of Natural History. Urbana. Bulletin. 



Bull. Iowa Agr. Coll. 



Iowa State College of Agriculture and the Mechanic Arts. Ames. 

 Bulletin. 



Bull. Ky. Exp. Sta. 



Kentucky Agricultural Experiment Station. Lexington. Bulletin. 



Bull. Lab. Bot. Siena. 



Laboratorio ed Orto Botanico. Siena. Bulletino. 



Bull. Md. Exp. Sta. 



Maryland Agricultural Experiment Station. College Park. Bulletin. 



Bull. Minn. Acad. 



Minnesota Academy of Natural Sciences. Minneapolis. Bulletin. 



Bull. Minn. Surv. 



Geological and Natural History Survey of Minnesota. Bulletin. 



Bull. Miss. Exp. Sta. 



Mississippi Agricultural Experiment Station. Bulletin. 



Bull. N. Car. Exp. Sta. 



North Carolina Agricultural Experiment Station. West Raleigh. 

 Bulletin. 



Bull. N. Dak. Exp. Sta. 



North Dakota Agricultural College. Government Agricultural Exper- 

 iment Station for North Dakota. Bulletin. 



BulL Nat. Hist. Soc. N. B. 



Natural History Society of New Brunswick. St. Johns. Bulletin. 



Bull. Nebr. Exp. Sta. 



Nebraska, University of. Agricultural Experiment Station of 

 Nebraska. Lincoln. Bulletin. 



Bull. N. Y. Bot. Gard. 



New York Botanical Garden. Bulletin. 



Bull. N. Y. Mus. 



N. Y. State Museum of Natural History. Albany. Bulletin. 



Bull. N. Y. Exp. Sta. 



New York Agricultural Experiment Station. Geneva. Bulletin. 



Bull. Oberlin College Lab. 



Oberlin College Laboratory. Oberlin, Ohio. Bulletin. 



Bull. Ohio Exp. Sta. 



Ohio Agricultural Experiment Station. Wooster. Bulletin. 



