80 2 3 9 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 Quercus 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 Peridermium fusiforme 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 Mycologia 

 6: H2, 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 (Bosc) 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 an I 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 1. 

 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 





