290 



Blodgett : Darluca upon Carnation Rust 



extending some little distance along the leaf. A few pustules of 

 the rust are usually present upon this area, and such are infested 

 as a rule, by the pycnidia of Darluca. Occasionally pustules 

 show the pycnidia when examined carefully, when there is no ex- 

 ternal evidence of their presence. Upon dead leaves, or dead 

 areas at least, the Darluca appears in rare instances as very fine 

 black specks, with no rust pustule closely associated with them. 

 It is of interest to note that while no mention seems to have 

 been made of the fact, the Darluca was parasitic upon this rust as 

 early as 1893,* two years after the rust appeared. It may be that 

 the decrease in seriousness of the rust during the past few years is 

 due in part to the check offered by the Darluca. But resistant 

 varieties have helped to diminish the fear with which florists first 



s 



t 



* Seymour & Earle, Economic Fungi, no. 460 ; U. caryophyllinns collected 1895 by 

 Clara E. Cummings, at Wellesley, Mass. Part of the specimen shows the Darluca dis- 

 tinctly. 



fC. F. Baker, Ft. Collins, Colorado, June, 1893.— The specimen in Herbarium 

 N. Y. Botanical Garden shows Darluca no. 59, Uromyces caryophyllinus Schrank. 



