76 



Mycologia 



The rust on the Scleria proved more than usually interesting on 

 account of the irregularity in septation of the teliospores. They 

 were found to have from one to four cells each, more commonly 

 three cells and, every sorus, whatever the dominant form of spore, 

 showed at least a few spores with three cells. It was not difficult 

 to identify this rust with the Brazilian form on Scleria hirtella, 

 named by Pazschke Rostrupia Scleriae. To the writer a variable 

 number of cells in the teliospore, without other diagnostic char- 

 acters, does not constitute a generic distinction, and the species is 

 therefore transferred to Puccinia. 



The species differs from Puccinia scleriicola not only in the 

 variable number of teliosporic cells, but in the more cylindric 

 form of the teliospores with thinner side-walls, and in the marked 

 development of a dark stroma about the sorus. The uredinio- 

 spores are similar in the two species, but in P. Scleriae they have 

 somewhat thinner walls, and still more obscure pores. 



Puccinia Scleriae is at present only known from Brazil and 

 Porto Rico, while Aecidium passifloriicola, the supposed alternate 

 form, is known from Porto Rico, Jamaica and Peru. 



50. Puccinia Eleocharidis Arth. 

 On Cyperaceae: 



Eleocharis capitata (L.) R. Br., Mayagiiez, March 3, II, 



37; Martin Pena, April 10, II, 36. 

 Eleocharis geniculata (L.) R. Br., Mayagiiez, March 2, II, 



39, March 13, II, 38; Naguabo, April 19, II, 40. 

 Eleocharis inter stincta (Vahl) R. & S., Mayagiiez, March 



20, II, 35. 



Eleocharis mutata (L.) R. & S., Martin Pena, April 10, 

 II, 41, 42. 



The last named host is a new one for the rust. No teliospores 

 were found in any of the collections. 



51. Puccinia Cladii Ellis & Tracy. 

 On Cyperaceae: 



Mariscus jamaicensis (Crantz) Britton (Cladium effusum 

 Torr.), Martin Pena, April 10, II, 43. 

 The first record of this rust for Porto Rico. It has previously 

 been reported for Bermuda on the same host, and it also occurs 

 on the same host in North Carolina and Mississippi. 



