

244 135 Mycologia 



less because too early in the season. Some additional probability 

 of the connection, however, was secured from a microscopic 

 examination. The urediniospores of the Carex rust proved to be 

 remarkably large, while the aeciospores on Smilax, belonging to 

 Aecidium macrosporum Peck, are also unusually large, as the 

 name indicates. But on the other hand the western Smilax aecia 

 belong to a grass rust, and most Carex rusts have aecia on com- 

 posite hosts. It is, therefore, more than usually gratifying to 

 complete the life cycle of this heretofore undetected Carex rust. 

 It is probably a more widely distributed species than shown by the 

 range of the present known aecial collections, all of which are 

 eastern, except one from Kansas. 



Puccinia macrospora (Peck) nom. nov. 

 {Aecidium macrosporum Peck, 23rd Rep. N. Y. St. Mus. 61. 



1873) 



0. Pycnia epiphyllous, few in groups on slightly discolored 

 spots, not conspicuous, subepidermal, in vertical section flattened- 

 globoid, 128-160/* in diameter by 80-10O/* high. 



1. Aecia hypophyllous, chiefly in annular groups 1.5-5 mm - 

 across, rather short, 0.1-0.2 mm. in diameter; peridial cells linear- 

 rhomboidal, 32-42/* long, outer wall thin, smooth, inner wall some- 

 what thicker, moderately verrucose; aeciospores globoid, very 

 large, 32-42 by 37-5 I/*, wall colorless, medium thick) 1. 5-2.5/*,, 

 thicker above, 5-1 O/*, rather coarsely verrucose. 



On Smilax hispida Muhl., Long Branch, N. J., July, 1870, G. 

 W. Clinton; Manhattan, Kans., June 25, 1886, W. A. Kellerman; 

 S. rotundi folia L., Riverhead, Suffolk Co., N. Y., 1869, Charles 

 H. Peck (type) ; Brown's Mills, N. J., June 26, 1889, B. Hoisted; 

 Seaford, Del., July 9, 1907, H. S. Jackson; Lewes, Del., June 6, 

 1908, M. T. Cook & H. S. Jackson. 



II. Uredinia amphigenous, scattered or in longitudinal series, 

 oblong, 0.5-1 mm. long, tardily dehiscent ; urediniospores obovate 

 or narrowly ellipsoid, rather irregular, very large, 26-37 by 40- 

 60/*, often narrowed below to a thickened hilum; wall golden 

 yellow, evenly thick, 2.5-3.5/*, echinulate with prominent points 3- 

 4/* apart ; pores obscure, 2 or sometimes 3, equatorial. 



III. Telia chiefly hypophyllous, scattered or in longitudinal 

 series, oblong or linear, 0.5-1.5/* long, finally naked, pulvinate, 

 chocolate-brown, ruptured epidermis noticeable; teliospores 

 clavate, 16-23 by 61-67/*, usually rounded or obtuse above, nar- 

 rowed below, usually slightly constricted at the septum ; wall pale 



