368 PROCEEDINGS OF THE ACADEMY OF [1894. 



Spots light browu (wood color), irregular in shape, small, I2-2 

 mm. , inconspicuous and indistinctly margined. Perithecia immersed, 

 small (65-70;/), barely visible with a lens. Sporules 40-50 x 2- 

 2§//, not strongly curved, nucleate, hyaline. 



Septoria Ludoviciana E. & E. 



On leaves of Laduca Ludoviciana, Fort Collins, Colo., June, 

 1894 (C. F. Baker, No. 257). 



Spots angular, limited by the veinlets, wood-brown, 2-5 mm. 

 diam., often confluent. Perithecia punctiform, minute, black, 

 epiphyllous, 75-80//. diam., apex erumpent. Sporules cylindrical, 

 more or less curved, obtuse, not septate, 15-25 x 2//. 



Differs from S. unicolor Winter, in its lighter colored, angular 

 spots, rather larger perithecia and thicker sporules; differs also in 

 several respects from S. Laduca: Pass, and S. laducicola E. & M. 



Septoria Trautvetterise E. & E. 



On Trantvetterla palmata, Nuttallburg, West Va. , July, 1894 (L. 

 W. Nuttall, No. 564). 



Spots irregular, subangular, partly limited by the veinlets of the 

 leaf, often elongated and acute at one end, brownish- black, with an 

 irregularly shaped white center which is well defined, angular, 3-5 

 mm. in the longer diam. Perithecia epiphyllous but also visible be- 

 low, small (65-75,".), scattered, dark. Sporules abundant, nearly 

 straight or slightly curved, continuous, 22-30 x 2//. 



Differs from S. A)iemonis Desm. in its broad, dark margined, 

 white centered spots and rather longer aud thicker sporules. 



Septoria Polymniae E. & E. 



On leaves of Folymnia Uveclalla, Nuttallburg, West Va., July, 

 1894 (L. W. Nuttall, No. 543). 



Spots scattered, angular, limited by the veinlets, 2-4 mm. diam., 

 dirty green. Perithecia epiphyllous, minute, 75//. diam. , scattered, 

 innate, inconspicuous. Sporules filiform, continuous, 35-50 x 1- 

 U/'.. 



Septoria hyalina E. & E. 



On Viola lanceolata, Massachusetts (Miss Clarke); on V. primu- 

 lafolia, West Va. (Nuttall), and on V. hlanda, Michigan (Hicks). 



Spots minute (^-1 mm.), white, with a dark purple-shaded border. 

 Perithecia punctiform, black, epiphyllous, subglobose, 65-75/'. diam., 

 not abundant. Sporules filiform, nearly straight, or slightly curved. 



