Adams : Alternate Stage of Pucciniastrum Hydrangeae 35 



verrucose; aeciospores broadly ellipsoid, 10-19 by I 9 _ -3 2 /*>* wall 

 colorless, with an elongate spot smooth on one side, the remain- 

 der finely verrucose, thin, from 1-1.5//, thick on smooth side to 

 3 fX on opposite side. 



On Tsuga canadensis (L.) Carr. (Pinaceae), Bear Run, 

 Lamar Gap, Clinton County, Pennsylvania, July 17, 1919, /. F. 

 Adams. Specimens have been deposited in the herbaria of the 

 New York Botanical Garden, Botanical Department of the 

 Pennsylvania State College, and the Arthur Herbarium at Purdue 

 University. 



State College, Pa. 



Publications Cited 



1. Arthur, J. C. Uredinales in North American Flora 7, Part 2, 1907. 



2. Clinton, G. P. Notes on Plant Diseases of Connecticut, Part X of the 



Biennial Report of 1909-1910, 713-738. 



3. Fischer, Ed. Cent, fur Bakt. 46: 333, 1916. 



4. Fraser, W. P. Cultures of Heteroecious Rusts Mycologia 4: 4, 175-193, 



July, 19 12. 



5. Sydow, P. & H. Monographia Uredinearum 3: 443, 1914. 



6. Weir, J. R. and Hubert, E. E. A successful inoculation of Abies lasiocarpa 



with Pucciniastrum pustulatum. Phytopathology 6: 373, 1916. 



