438 PROCEEDINGS OF THE ACADEMY OF [1895. 



Cercosporella Baccharidis E. & E. 



On leaves of Baccharis Douglasii, Berkeley, Cala., June, 1894. 

 W. C. Blasdale. 



Spots suborbicular, 3-4 mm. diam., dirty-brown, greenish at 

 first, mostly wrinkled. Hyphae hypophyllous, cespitose, hyaline, 

 simple, mostly straight and continuous, entire or faintly toothed 

 above, 25-40 x 4 //. Conidia cylindrical, obtuse at both ends, 1-3- 

 septate, hyaline, 40-60 x 4-4 h p.. 



Ceroosporella nivosa E. & E. 



On leaves of Pentstemon Digitalis, Ohio. Morgan, No. 414, and 

 on P. ovatus, Idaho. Piper, No. 297. 



Spots small, round, 1-2 mm., white, with a narrow slightly raised 

 margin surrounded by a purplish discoloration. Hyphae simple, 

 subattenuated above, nucleate, continuous, 12-15 x //, long hyaline 

 above, brownish and more or less swollen below, numerous, seated on 

 a hemispherical, cellular, brownish, sphaeriaform base and bearing at 

 their tips the cylindrical, hyaline conidia, 12-25x1^-2//., nucleate 

 and becoming 1-2-septate. 



Differs from C. Pentstemonis E. & K., in its smaller hyaline 

 conidia and hyphae, white spots, and narrow, thread-like margin. 



Cercospora hibiscina E. & E. 



On leaves of Hibiscus tiliaceus, Mexico, 1895. Dr. E. Palmer, 

 No. 328. 



Hypophyllous. Hyphae sparingly branched, septate, equal, 3] -4 //. 

 diam.. 300-400 \j. long, often undulate above, forming loosely inter- 

 woven, olive- black patches, 2-4 mm. diam. but not on any definite 

 spots. Couidia clavate-cylindrical, hyaline, about 3-septate, 30-50 

 x 3J— 4o ;>.. Apparently the conidial stage of some ascigerous fungus. 



This is very distinct from C. Hibisci Tr. & Earle. 



Cercospora stomatica Ell. & Davis. 



On leaves of Solidcujo latifolia, Somers, Wis., June, 1894. Dr. J. 

 J. Davis. 



Spots irregular, angular, black, with a yellow shade in the sur- 

 rounding green part of the leaf, 3-4 mm. diam. Hyphae hypophyl- 

 lous, issuing in loose tufts of 4-10 from the stomala of the leaf, 32- 

 70x4-7//, 2-3-septate, subgeniculate, nearly straight, pale- brown. 

 Conidia hyaline or yellowish-hyaline* attenuated above, 4-8, or 

 more, septate, straight or slightly curved, 50-150 x 5-6 [jl. 



