DISCOVERY OF INTERNAL TELIA PRODUCED BY A 

 SPECIES OF CRONARTIUM 



By REGINALD H. COLLEY, 



Agent, Investigations in Forest Pathology, Bureau of Plant Industry, United States 



Department of Agriculture 



INTRODUCTION 



Adams (i) 1 has recently listed the reports of a number of investigators 

 who have found rust sori developing internally in the host tissue. Both 

 Adams (i) and Wolf (7) fail to mention the work of Bolley and Pritch- 

 ard (2) and Pritchard (5, 6), who made careful studies of internal sori in 

 wheat grains. A review of the literature shows that pycnia, aecia, 

 uredinia, and telia have been found inside the tissue of the host plant, 

 producing what were apparently normal spores. Table I summarizes 

 all the accounts of internal rust, sori which are known to the writer. 



TABLE I. Summary of accounts of internal rust sori 



1 Reference is made by number to "Literature cited," p. 332. 



Journal of Agricultural Research, 



Washington, D. C. 



he 



(329) 



Vol. VIII, No. 9 

 Feb. 26, 1917 

 Key No. G 107 



