May 1907] Fungi Selecti Guatemaleyises lOl 



15. Puccinia heliotropii Kern & Kellerman 



On Heliotropium indicum L. 



Gualan, alt. 122 m. (400 ft.), Dept. Zacapa, Guatemala, Central 

 America. March 12, 1906. 



W. A. Kellerman, No. 4326. 



Host No. 4326 bears the type, of which material the specimen here 

 issued is a part. The collection on host No. 4372 (determnied by John 

 Donnell Smith), as stated by Mr. Kern also bears aecia which without 

 doubt belong to an entirely distinct species of rust. The species here 

 under consideration is of the ordinary leptopuccinia type. It differs from 

 Puccinia heliotropicola Speg. by the longer and more oblong spores with 

 a thickened apex. 



16. Puccinia purpurea Cooke 



On Sorghum vulgare Pers. 



Antigua, alt. 1520 m. (5066 ft., Depart. Sacatepequez, Guate- 

 mala, Central America. February 8, 1907.. 



W. A. Kellerman, No. 6074. 



Apparently not common in Guatemala ; found in only one locality 

 — a few plants in the court of the hotel "El Manchen," at Antigua, these 

 being seriously infected. 



17. Puccinia tetramerii Seymour 



On Blechum brownei Juss. 



Laguna (Lake Amatitlan), alt. 1200 m. (3950 ft.), Depart. Ama- 

 titlan, Guatemala, C. A. January 17, 1906.. 



W. A. Kellerman, No. 5400. 



The host was determined by John Donnell Smith. The Rust was- 

 passed on by Frank D. Kern and Dr Arthur. The type specimen of 

 this species was collected in Oaxaca. Mexico, (issued in Pringle's Mexi- 

 can Fungi, No. 9, Sept. 1, 1896), on leaves of Tetramerium aureum Rose. 



18. Puccinia tithoniae Dietel & Holway 



On Tithonia tubaeformis Cass. 



Laguna (Lake Amatitlan), alt. 1200 m, (3950 ft). Depart. Ama- 

 titlan, Guatemala C. A. January 30, 1906. 



W. A. Kellerman, No. 5425. 



The Rust was determined by Frank D. Kern and Dr. Arthur, the 

 host by John Donnell Smith. It seems to be common in Guatemala. It 

 was originally collected in Mexico by E. W. D. Holway. on Tithonia 

 tubaeformis and T. tagetiflora. The authors of the species remark that it 

 is much like P. helianthi Schw., but the spores are darker, average- 

 smaller, and the septum is less thickened at the sides. 



