1894.] XAT(n?AI. SCIENCES OK PHILADEJ^PIIIA. 379 



Cercospora (Cercosporella) Fraserae E. it E. 



Ou leaves of Frasera speciosa, mountains west of Bear Valley. 

 Colo., July, 1894 (Prof. C. S. Craudall, No. 65). 



Spots lar^e (A-l cm. ), pale brown with a narrow, black border. 

 Hyphse in scattered tufts, appearing under the lens like minute, pale 

 white granules, continuous, hyaline, 15-20x3//. Conidia gradually 

 attenuated above, hyaline, faintly 1-4-septate, 80-110 x 3-3^,". 



The general appearance is about the same as that of Marsonia 

 Frasercn E. & E. , but this is quite a diffei'cnt thing. 



Cercospora Borreriea E. & E. 



On leaves of Borreria micrcmtha, Biloxi, Miss., July, 1893 (Prof. 

 S. M. Tracy). 



Hypophyllous. Tufts effused, forming a thin, olivaceous coating. 

 Hypha? slender, undulate or crisped and geniculate, 100-120x3- 

 Sip., brown, nucleate and indistinctly and sparingly septate. Conidia 

 slender lanceolate, hyaline, 3-5-septate, 35—45 x 3—35//. 



Cercospora ribicola E. & E. 



Ou leaves of Ribes sanguineum, Seattle, Wash., Aug. 1893 (C. 

 V. Piper, No. 81). 



Spots numerous, subangular and partly limited by the veinlets, 

 definite but without any distinct border, red- rusty brown, 2-4 mm. 

 diam. Tufts mostly epiphyllous, sphseriseform, not eifused, appearing 

 like small, clustered, superficial perithecia. Hypha? densely fascicu- 

 late, pale brown, continuous, simple 25-35 x 35-4//. Conidia lanceo- 

 late, hyaline, nucleate and 1-3-septate, 35-80 x 3-4//. 



Quite different from C. marginalis Thum. Well characterized 

 by its red-brown spots and sphseriseform tufls of hyphse. 



Cercospora Cirsii E. & E. 



On Cnicus remotifolius , Skamania Co., Wash., Aug. 1886 (W. 

 N. Suksdorf, No. 291). 



Spots dark brown, paler below, suborbicular, 3-5 mm. diam. or 

 by confluence irregular and larger, often marginal, definite. 

 Hyphte epiphyllous, tufted, the small black tufts thickly covering the 

 spots, short, simple, pale brown, nearly entire, 15-30x3^-4-. 

 Conidia slender, hyaline, 4-6-septate, 50-80 x 3i//. 



Cercospora Baccharidis E. & E. 



On Baceharis Douglasii, Berkeley, Cala., June, 1894 (W. C. 

 Blasdale, No. 254). 



