MYCOLOGIA 



Vol. XI 



July, 1919 



No. 4 



ROSTRONITSCHKIA, A NEW GENU&^ ^^^f/ 



An interesting Pyrenomycete parasitic on the leaves of Ges- 

 neria alhiflora Kuntze was collected on the Island of Porto Rico 

 in the winter of 191 5 by a party of botanists representing the 

 New York Botanical Garden. Material of this collection was 

 studied later by Rehm, who stated in a letter to F. J. Seaver that 

 he regarded the fungus as an undescribed species. He proposed 

 lor it the name Nitschkia nervine ola Rehm^ and inclosed in his 

 letter a detailed Latin diagnosis. This diagnosis, dated June, 

 1915, is attached to the packet of material of this collection in 

 the herbarium of the New York Botanical Garden, but apparently 

 has not been published. 



The fungus had been collected previously in 1913 and in 1914 

 in Porto Rico by F. L. Stevens. Specimens of some of his col- 

 lections, sent to the New York Botanical Garden, were examined 

 by Seaver and found to be identical with the material studied by 

 Rehm. Subsequently ten different collections were deposited by 

 Stevens in the herbarium of the University of Illinois, and in a 

 paper^ on Porto Rican fungi he Hsts them under the name 

 Nitsehkia nervineola. He does not describe the species, and the 

 writer has found no other mention of the fungus in literature. 



In the winter of 1916, H. H. Whetzel and E. W. Olive made 

 extensive collections of fungi in Porto Rico, and obtained abun- 



1 Stevens, F. L. Porto Rican Fungi, Old and New. Illinois Acad. Sci. 

 Trans. 10: 185. 1917. 



[Mycologia for May (11: 101-161 was issued June 7, 1919.] 



PYRENOMYCETES 



Harry Morton Fitzpatrick 



(With Plate ii) 



163 



