4 00 NATURAL HISTORY BULLETIN. 



possess what appears to be the specially marked character in 

 the original description: a distinctly cylindrical or elongated 

 peridium. The peridia in this specimen are over a half milli- 

 meter long. No other divergent characters are evident. But 

 in a specimen upon Rhamnus cathartica received from L. H. 

 Pammel and collected at Parkersburg, Iowa, and also one on 

 Rhamnus frangula in Linhart's Fungi Hungarici, No. 329, 

 not only are the peridia remarkably long, but the spores are 

 conspicuously large, measuring 18-26//. The form on R. 

 frangula is undoubtedly the one called by Link {Handbuch 

 3:446) Caioma rkamnatum, said to have " Becher lang, oft 

 herausfallend," and to be distinct from ^lE. crassatum found on 

 various species of Rhamnus. It seems probable from the 

 above facts that the elongated peridium and larger spores are 

 not permanent characters, but depend upon some condition of 

 growth. It may be accepted, therefore, that sE. ■pulcherrimum 

 Rav., so far as morphological characters can show, is to be 

 considered a synonym of Puc. rhamni; but the cultural side 

 of the question still remains to be investigated. 



EXSIC. 



Ellis, N. A. F. 269. 



Ellis and Everhart, N. A. F. 1821. 



Seymour and Earle, Econ. Fungi 78a, 78$. 



Sjdow, Ured. 420, 513. 5 6 3. 7 l6 > 7 6 7- 



Vize, Fungi Brit., 116, 155. 



Krieger, Fungi sax., 473. 



Allescher and Schnabl, Fungi bav. 116. 



32. Puccinia sorghi Schw. (1834. N. Am. Fungi: 295. 



32a. On Zea mays L. Decorah, Iowa, Hohvay. 

 32b. On Zea mays L. Decorah, Iowa, Hohvay. 

 32c. On Zea mays L. City of Mexico, Mex., Hohvay. 



Orig. Desc. " 2910. 6. P. Sorghi L. v. S., frequens in foliis Sorghi et 

 Zese cult. Bethl. 



P. emaculata. Acervis latis difformibus rarie lobatis, primum epi- 

 dermide tectis, demum denudatis sed in margine cinctis et turn epider- 

 mide lacerata. Acervis saepe etiam, quasi versus centrum internum 

 lobatis-2-4 lineas longis latisque. Majores acervi ad nervos foliorum 

 occurrunt. Sporidiis aterrimis grossis breviter pedicellatis." 



