212 



Mycologia 



The chief point of interest in connection with this species is 

 the presence of two sorts of urediniospores. The urediniospores 

 of the modified sort have been called amphispores. The chief 

 modification is a greater thickness of wall presumably fitting them 

 for living over winter. In some species amphispores are modi- 

 fied as to markings and pore arrangement. In this species the 

 markings are more verrucose in their nature and more prominent 

 but the pore arrangement is the same. The characters of the 

 sori differ also, the amphisori being twice as large, more pulvinate 

 and dark-chocolate-brown as compared with the cinnamon-brown 

 uredinia. These amphispores have never been germinated but 

 in other cases amphispores have been demonstrated to germinate 

 and produce infection in the same manner as urediniospores. 



3. Puccinia macrospora (Peck) Arth. Mycologia 1:244. 1909 

 Aecidium macrosporum Peck, Ann. Rep. N. Y. State Mus. 23 : 61, 

 1873. Not A. macrosporum Diet. & Neg. 1896. 



O & I. Pycnia and aecia on Smilax spp. (For cultures see 

 Mycologia 1: 243, 1909.) 



II. Urediniospores obovate or narrowly ellipsoid, rather irreg- 

 ular, very large, 26-27 X 35-61 fx, often narrowed below to a 

 thickened hilum; wall golden yellow, 2.5-3.5^ thick, echinulate 

 with prominent points 3-4 /x apart, the pores obscure, 2, or some- 

 times 3, equatorial. 



III. Teliospores clavate, 16-23 X 61-67 /x, usually rounded or 

 obtuse above, narrowed below, often slightly constricted at the 

 septum; wall pale-cinnamon-brown, paler below, 1.5-2.5 /x, much 

 thicker above, 9-16 /x; pedicel colorless, one half to once length of 

 spore. 



On Carex comosa. 



Distribution : Limited area near the coast from Long Island 

 to Delaware, with a single collection of aecia from Kansas. 



This is a remarkable but little known species. The very large 

 size of the urediniospores even when compared with the form 

 belonging to Urtica, which has always been regarded as having 

 large urediniospores, attracts immediate attention. The aecio- 

 spores are also exceedingly large (32-42 X 37S 1 i^) and it was 

 in fact the similarity in these spore structures which was chiefly 



