1893.] NATURAL SCIENCES OF PHILADELPHIA. 153 



III. Sori amphigenous, J-l mm. diam., slaty black, hemispherical,, 

 erumpent and soon naked, crowded or confluent, often surrounding 

 and deforming the leaf. Teleutospores oblong, rather palp brown,, 

 constricted, the upper cell mostly narrowed into a bluntly pointed! 

 apex, the lower cell rounded at base or narrowed into the stout, 

 slightly colored pedicel, which is 75-100/* long. Epispore smooth, 

 thickened at the apex. 



Puccinia ludibunda E. & E. 



On leaves of Carex sparganioides, Rockport, Kansas. Oct., 1892. 

 (Bartholomew, No. 764.) 



III. Sori epiphyllous, dark chestnut-brown or nearly black, soon' 

 naked and prominent, 1-3 x f-H mm. Teleutospores clavate or 

 clavate-elliptical, 40-55 x 12-16//., constricted at the septum, upper 

 cell more deeply colored and subelliptical, loAver cell mostly nar- 

 rower and paler, epispore smooth, distinctly thickened at the apex 

 which is either regularly rounded or prolonged and obtusely pointed 

 or sometimes truncate and in this case, occasionally crowned with 

 2-3 short horn-like processes as in P. coronata. Pedicel hyaline, 

 stout, about as long as the spore. Besides the uniseptate spores, 

 quite an appreciable number of spores are found with two septa. 



Puccinia tuberculans E. & E. 



On leaves of Aplopappus, Muncy, Nevada. July, 1891. (M. K. 

 Jones, No. 21.) 



III. Amphigenous. Sori scattered or confluent, about 1 mm. 

 diam., covered by the thick epidermis which is raised into rather 

 flat tubercles and finally ruptured, color dark chestnut. Teleuto- 

 spores elliptical or oblong-elliptical, 25-40 x 18-22//, slightly con- 

 stricted, epispore smooth, light chestnut-brown, thickened at the 

 apex of the spore and generally raised into a subacute papilla. 

 Pedicels hyaline, 40-60//. long. 



Seems to be a well marked species on account of the tuberculiform 

 sori. 



Puccinia columbiensis E. & E. 



On Oenothera biennis, Banff, British Columbia. July, 1891. 

 (J. Macoun.) 



III. Amphigenous, on yellowish, slightly thickened spots. Sori 

 minute, not over i mm. diam., nearly black, erumpent, subconcentric- 

 ally arranged and crowded in dense, orbicular patches li-4mm. 

 across and whitened by the fragments of the ruptured epidermis. 



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