PLANT DISEASES OF CONNECTICUT, 351 
or tongue-shaped, and run together on the stems, as shown in 
the illustration. On the leaves they are smaller, more isolated, 
more nearly conical, with one to three on a leaf. An examina- 
tion of the sori showed that they contained two types of spores,— 
one type long, pointed, thin-walled, chiefly in the interior of 
the sorus, and the other smaller, thicker-walled, with round 
apices, less abundant, and chiefly on the exterior. Those on 
the leaves are as a rule smaller than those on the stem. Shirai 
found that insects, especially bees, were important factors in 
carrying the sporidia of the germinating teleutospores in these 
sori to the alternate rosaceous hosts. 
This rust is probably perennial in the stems of the juniper, 
or else it takes two years for the sori to develop after infection. 
A juniper, which was badly rusted at the time of their discovery, 
was potted and placed in our greenhouse, where it has remained 
for two years. After the disappearance of the sori in the 
spring, the plant showed no signs. of the rust that year or the 
next, but the spring following it again broke out in a different 
part of the stem, but not»so conspicuously. Just how serious 
this rust might prove in its I stage on our pomaceous fruits, if 
it got started here, we do not know, but they certainly already 
have enough similar troubles. 
KAFFIR CORN, Sorghum vulgare var. 
Grain Smut, Sphacelotheca Sorghi (Lk.) Clint. We have 
reported this smut before on sorghum and broom corn. In 
September, 1911, we found it not only on these hosts, but also 
on Red Kaffir corn grown at the Experiment Station farm for 
experimental purposes. None of these hosts are of commercial 
importance in this state, so the smut is not of economic import- 
ance here, though often serious elsewhere. It changes the seeds 
into kernels filled with a dusty mass of brownish-black spores. 
PEACH, Prunus Persica. 
Stem CANKER, Phoma Persice Sacc. This fungus has been 
reported previously in this country by Selby of Ohio (Ohio Exp. 
Stat. Bull. 92: 233. 1898. Ibid. 214: 423. 1910), who called 
it Constriction Disease of Stem, or Stem Blight. He reported it 
doing considerable injury in one lot of heeled-in nursery stock, 
