RUST FUNGI 



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teliospores appear on irregular spheric swellings or excrescence on 

 Juniperus virginiana. 



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

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



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

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



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

 of native species of apples {Malus). 



The most important publication dealing with this disease and giving 



