PROTOBASIDIOMYCETES 



419 



XVIII. HOLLYHOCK RUST 



Pncrinia malvacearum Mont. 



Dudley, W. R. The Hollyhock Rust. Cornell Agl. Exp. Sta. Built. 25 : 

 154-155. 1890. 



Fig. 204. Puccinia malvacearum : Rust of Hollyhock. (Photograph by 



H. H. Whetzel) 



The hollyhock rust is known to infest a large number of genera 

 and species of the mallow family (Malvaceae). It is at present widely 

 distributed throughout a large portion of the world, and is in the 

 United States most important on the cultivated hollyhock (Althcea 



