148 QUINCE CULTURE, 
This rust of the quince is a form of fungus that lives 
during a part of its development on the two kinds of 
juniper, namely: the red cedar and the low juniper, and 
is recognized upon the stems by the swollen nodules and 
the reddish color. 
To repeat, the fungus known as Gymnosporangium 
clavipes, C. & P., one of the kinds of cedar galls, is a 
Fig. 138. YOUNG QUINCES AFFECTED WITH RUST. 
form of the rust (Restelia aurantiaca, Pk.) that attacks 
and injures the quinces. This rust stage also grows 
upon apples, hawthorns, and the Juneberry, or shad 
bush, as it is sometimes called. It is often quite abun- 
