192 ARTHUR-BISBY— TRANSLATION OF SCHWEINITZ'S 



tate paraphyses. The host is the common Kentucky blue-grass, 

 Poa pratensis L. It is a species not found on other grasses or on 

 grains, although uredinia of similar gross appearance are found on 

 both, and were all given the same name by older mycologists. Prob- 

 ably the original portion of the material on cereals was removed by 

 Schweinitz, leaving only the part on meadow grass. 



*28i9. 9. C. U. rimosum, Lk. n. 14, rather rare on Scirpus near Hope, New 

 Jersey. 



Represented by one 5 cm. mounted piece of a terete culm, and 

 five similar pieces, 3 to 5 cm. long, in the original packet, which is 

 labelled " Cseoma (Ured) rimosum in Scirp acut. spec, imperfecta 

 ob bonas pertus. Hope Jersey." The host is undoubtedly Scirpus 

 lacustris L. {S. acutus Muhl.), the plant that Schweinitz took it 

 to be. 



The smooth surfaces of the culms show a few quite regular 

 rifts, 5-15 mm. long, but no spores or fungus of any kind. These 

 rifts may have been interpreted by Schweinitz to be the " acervis in 

 rimis longitudinalibus parallelis positis" of Link's description, for 

 he has entered on his packet that he had an " imperfect specimen on 

 account of marked perforations." Link's Cceoma rimosum was, 

 however, founded upon a fungus on Jiincns acutus from Egypt, 

 and could not have been the same as an American fungus on Scirpus. 

 Lagerheim in his study of the rusts in the Herb. Fries (1. c, page 

 67) has erroneously added " Uredo rimosa Schwein." as a synonym 

 of Puccinia obfecta Peck, a rust that occurs on both Scirpus pungens 

 (the host in the Herb. Fries from New York), having triangular 

 stems, and 6". lacustris, having terete stems. Had this rust been 

 present Schweinitz w^ould probably not have referred it to Link's 

 species, because of the slight resemblance which it bears to Link's 

 description. 



*2820. ID. C. U. Andropogi, L.v.S., on leaves of Andropogon avenaceum, 

 Bethlehem; rare and related to C. longissimum, from which it 

 differs particularly by an evident purple spot. 

 C. spots much elongated, narrow, purple. Sori much elongated, 

 parallel, narrowed, longitudinally erumpent from the raised epi- 

 dermis. Spores at last loosely scattered, globose, rufo-fuscous. 



