THE RUSTS OF GUATEMALA— II * 



Frank D. Kern 



The first article of this series was published in 1907 in the 

 Journal of Mycology, vol. 13, pp. 18-26. The general introduc- 

 tory remarks used there apply equally well to the present paper 

 but since a considerable time has intervened it may be well at this 

 time to again call attention to the principal points. The speci- 

 mens upon which both papers have been based were collected 

 in Guatemala by the late Professor W. A. Kellerman (except 

 one specimen by Professor Wm. Trelease) and placed in the 

 hands of the writer for identification and study. Professor 

 Kellerman made in all four excursions for the collection and 

 study of the Guatemalan flora. So rich were his collections of 

 the rusts, however, that specimens secured during the first two 

 excursions (with one or two exceptions) have sufficed for both 

 this and the earlier report and there still remains a number which 

 have not yet been determined. 



Ravenelia Mimosae-albidae Dietel. • On Mimosa albida 



floribunda Rab. (host no. 5222, det. by B. L. Robinson), Antigua, 

 Depart. Sacatepequez, Feb. 18, 1905, no. 5360. 



Cionothrix praelonga (Winter) Arth. — On Eupatorium 

 popuUfolium H.B.K. (host det. by J. M. Greenman), Los Amates, 

 Depart. Izabal, alt. 90 m., March 15, 1905, nos. 5301, 5302. 



Calliospora Diphysae Arth. — On Diphysa sp., Palmar, De- 

 part. Quezaltenango, Feb. 11, 1906, no. 5459. 



A little known but characteristic species hitherto known only 

 from the type locality, Rio Blanco, Guadalajara, Mexico. 



Puccinia gregaria Kunze. — On Xylopia sp., Los Amates, De- 

 part. Izabal, alt. 90 m., March 15, 1905, no. 5330. 



A very interesting species because of the odd characters of 

 the teliospores. The apex of the upper cell and the base of the 

 lower cell have the wall thickened and over these areas the spinu- 

 lose papillae are much longer than on the sides. The species has 



* Contributions to Guatemalan Mycology — V. (The first three papers in 

 this series were by W. A. Kellerman, the fourth by the writer.) 



288 



