Sul. 247, U. S. Dept. of Agriculture. 
Plate 
Injuries to Pines Produced by Cronartium pyriforme. 
Fig. 1. — A slight hypertrophy of the trunk of a small tree of Pinus pungcns produced by the 
seciaof Cronartium pyriforme. (About one-third natural size.) Fig. 2.— Openings produced 
by the rupturing of the bark of Pinus pungens by the maturing of the aecia of Cronartium 
(Peridermium) pyriforme. (About one-third natural size.) Fig. 3. — A twig of Pinus contorta, 
showing a fusiform swelling produced by Cronartium ( Peridermium) pyriforme on this species 
of tree. Similar fusiform swellings are produced by the fungus on Pinus ponderosa. (About 
one-half natural size.) 
