RUST FUNGI 



teliospores appear on irregular spheric swellings or excrescence on 

 Jitiiiperus virginiana. 



The mycelium of G. jimiperi-virginiance is annual, or biennial, 

 producing globose swellings known as cedar apples on the leaves of the 



Fig. 8i. — Alagnified view of apple rust roestelia, or aecia. (After Jones and 

 Bartholomew, Bull. 257, Agric. Exper. Slat. Univ. Wise, July, 1915.) 



red cedar, Juniperus virginiana. The cluster cups appear on the leaves 

 of native species of apples {Mains). 



The most important publication dealing with this disease and giving 



