80 
Mycologia 
The second consignment was received April 5, 1913, consisting 
of a much larger gall, three inches in diameter by six inches long, 
but less typical in appearance. This material was sown April 6 
on Querciis rubra and Q. Phcllos. On the former, uredinia began 
to appear April 14, and on the latter April 18, followed by telia 
in both cases April 28. 
This result shows without question that the form known under 
the name of Peridermhini fiisiforme is identical specifically with 
P. Cerebrum, both being the aecial stage of Cronartium Quercus. 
This cultural result is briefly referred to by Dr. Kern in IMycologia 
6: 1 12, 135. 1914. The non-appearance of the repeating stage in 
one case is an interesting phenomenon apparently connected with 
some condition of the host. 
18. Peridermium carneum (Bose) Seym. & Earle. — Leaves 
of Pinus taeda bearing this rust were gathered by Prof. P. H. 
Rolfs, at Gainesville, Fla., February 12, 1913, and two days later 
were used by use to make a sowing on V ernonia fasciculata. Ure- 
dinia began to appear in abundance on March 3. Another col- 
lection of the rust was gathered by Mr. H. E. Stevens from 
Pinus palustris in the vicinity of Gainesville, Fla., on March i. 
This material was from small plants in the open, over which 
leaves of Ipomoea pandurata well covered with Coleosporium Ipo- 
moeae had been placed the previous fall. The field condition ap- 
peared to warrant the inference that the pine aecia were derived 
from the Ipomoea telia. A sowing of the material was made 
March 10 on Vernonia fasciculata, but no plants of Ipomoea were 
available for a culture. Uredinia appeared on the Vernonia in 
abundance on March 29, and in the typical form of Coleosporium 
Vernoniae. 
This result does not preclude the possibility that Coleosporium 
Ipomoeae is a form of C. Vernoniae, but judging from the micro- 
scopic appearance of the urediniospores, that species is more likely 
to be a form of C. Solidaginis than of C. Vernoniae. 
Cultures in 1914 
19. PucciNiA EXTENSicoLA Plowr. — A collection of the form 
known as P. vulpinoidis, collected by Mr. Travelbee and the writer 
