362 



104. Uromyces graminicola Burrill, Bot. Gaz. 9:188. 1884. 



Uromyces Panici Tracy, Jour. Myc. 7:281. 1893. 



Nigredo graminicola Arth. Result Sci. Congr. Bot. Vienna 343. 1906. 

 On Poaceae: 



Panicum virgatum L., Collins Beach, Oct. 1, 1907, (1779) ; 

 Selb>-\ille, Oct. 4, 1907, (1790). 



This species is inseparable morphologically from Puccinia Panici 

 Diet, except in the number of cells in the teliospore. The Puccinia has 

 been studied culturally by Stuart (Proc. Ind. Acad. Sci. 1901:284. 1902) 

 and Arthur (Jour. Myc. 11:56. 1905; 12:16. 1906; 14:16. 1908) and 

 shown to be connected genetically with Aecidium Pammelii Trel. on 

 Euphorbia coroUata in Indiana and E. nmrginata in Nebraska. Aecia 

 on various Euphorbiaceous hosts have also been referred to that species 

 on morphological grounds. 



While no cultures of the Uromyces have been successfully carried 

 out, it is probable that the aecial stage will be found on some member 

 of the Euphorbiaceae. The field evidence at present available suggests 

 that A. Stellingiae Tracy & Earle, which occurs on various species of 

 Stellingia and Sebastina in the south and southwest is a very probable 

 aecial connection. This aecidium is moi-phologically indistinguishable 

 from A. Pammelii and it is possible that some of the forms now referred 

 to that species will be found to belong here. 



105. Uromyces Halstedii DeToni in Sacc. Syll. Fung. 7:557. 1888. 

 Uromyces digilahis HaLsted, JoUr. Myc. 3:138. 1887. (Not U. digi- 



tatns Wint. 1886.) 



Nigredo Hahtedii Arth. N. Am. Flora 7':226. 1912. 

 On Poaceae: 



Homulocenchriis oryzoides (L.) Poll. {Leer.sia oryzoides (L.) 

 Sw.), Seaford, April 23, 1908, (2034). 

 The aecial stage of this rather rare grass rust is at present un- 

 known. The telial stage is known to the writer on the above host other- 

 wise only from Wisconsin and South Dakota. 



106. Uromyces Hedysari-paniculati (Schw.) Fail. Ell. N. A. Fungi 



246. 1879. 

 Puccinia Hedysari-paniculati Schw. Schr. Nat. Ges. Leipzig 1:74. 

 1822. 



