AMERICAN UREDINE^E. 390 



into finger-form projections, either erect or more or less 

 inclined, corona-like; base somewhat narrowed; pedicel very 

 short or obsolescent. 



This is a species the limits of which are not readily estab- 

 lished; but only what is thought to be typical material has 

 been placed in the present fascicle, leaving other collections 

 for future study and reference. 



The connection of the aecidium was established by sowings 

 made in the greenhouses of Purdue University in June, 1898. 

 The a^cidiospores from Rhamnns lanceolata were placed upon 

 the first leaves of seedling oats on June 2, and on June 10 the 

 first sori appeared. By June 29 four leaves showed an ample 

 growth of characteristic sori, and no instances of sori outside 

 the infected areas appeared. Although the leaves died before 

 time enough had elapsed for teleutospores to form, yet the 

 results, taking into account the microscopic examination and 

 the absence of all indication of accidental contamination, may 

 be accepted as conclusive. We have no opinion to offer at 

 the present time regarding Klebahn's separation into two 

 species of the forms which have previously passed under the 

 name Pnccinia coronata. So far as the material presented in 

 this fascicle is concerned, we believe that it all belongs to one 

 species, and that it is rightly referred to Puccinia rhamni. 



The synonymy, so far as European publication is concerned, 

 is not of great moment in the present connection, but atten- 

 tion may be called to an American name. In Berkeley's 

 "Notices of North American Fungi" (Grev. 3:61) is de- 

 scribed SEcidium -pulchcrrimum Rav. on Berchemia, as follows : 

 " Pseudoperidia occupying the whole surface, snow white, 

 cylindrical, obtuse, at length open, edge not radiated." F. W. 

 Anderson (Jour. Myc. 6:121) considered this to be identical 

 with s£. crassnm Pers. and ^". rhamni Pers. Examination 

 of material in Ravenel's Fungi Car. Exsic. No. 726 (specimen 

 in the herbarium of the Iowa Agricultural College) shows no 

 certain morphological distinction between it and the usual col- 

 lections upon Rhamnns. The specimen similarly labelled in 

 Ellis and Everhart's North Am. Fungi No. 2712 does, however, 



