JOURNAL OF MYCOLOGY. 



Ilyphje fasciculate-intricate, brandling, 80—120 x 4 /^ flexiious, den- 

 ticulate, septate-guttulate, of an olivaceous yellow, forming dirty green 

 isli patches, either limited by the veinlets or spreading over nearly the 

 whole lower side of the leaf which is indistinctly mottled with yellow 

 above. Conidia elongated or fusoid, rather obtuse at each end, pale 

 olive, curved, 30—40 x 5—6 /^-, and 3—4 septate when mature. 



On living leaves of Passiflora iutea, Cobden, Illinois, Oct. 1883, (Earle). 



92. Cercospora Pyri, Farlow. Appalachia, Vol. Ill, p. 250. 

 "Hypophyllous, forming large, indefinite, blackish spots on the 



leaves. Hyphse fasciculate, simple, nearly hyaline, stout, subdenticulate 

 above, 30—60 x 5 — 7 z^-. Conidia fusiform, mostly a little curved, 3 — 6 

 septate, hyaline, ends obtuse, 30— 6i> x 4 — 6 



On living leaves of Pyrus arhutifolia, Wisconsin (Fammel), New 

 Hampshire (Farlow.) 



93. Cercospora acetosella. Ell. Bull. Torr. Bot. Club, VIiI,p. 65. 

 Forming leaden gray patches on the withered leaves. Hyphse erect, 



short, sparingly septate, fasciculate in minute tufts thickly scattered 

 over the alfected leaves. Conidia linear obclavate, nucleate (becoming 

 septate V) 50—70 p- long. 



On leaves of Bumcx acetosella, Sept., Newtield, jS". J. 



94. Cercospora Dioscore^, E. & M. Am. N'at., Dec. '82, p. 1003. 

 Hyphse csespitose, brown, scarcely septate, 30 x 31 /^-, forming indefi- 

 nite, dirty brown patches (i— 1 cm.) on the lower surface of the leaf 

 which is mottled with brown and yellow above. Conidia yellowish-sub- 

 liyaline, subcylindrical, only slightly attenuated above, 3—8 septate, 50— 

 5)0 X 4—5 P: 



On leaves of Dioscorea villosa, Penn. (Dr. Martin.) 



95. Cercospora cana, Sacc. F. Ven. Kov. V, p. 188. X. A. F. 1248. 

 Fusidium canum, Pass, in Thuem. M. U. 378. 



Hypophyllous, elfused, white, covering considerable areas of the 

 leaves. Hyphse continuous, subramose or denticulate above, hyaline, 30— 

 35 X 4—5 /J; Conidia cylindric-obclavate, 60—90 x 4—5 P- (exceptionally 

 100—120 X 6 /^'), 3— 4-septate and guttulate, hyaline and slightly curved. 



On leaves of different species of Erigeron, Eastern, Middle and 

 Western States. 



96. Cercospora clavata (Gerard) HelmiiitJiosporium clavatum, 

 Ger. Bull. Torr. Bot. Club, y,p 27. Virgasporium cla,vatum [GeT.) Cke. 

 in Grevillea III, p, 182, and IV, p. 69, and Cercospora clavata (Ger.) Pk. in 

 34th Rep. Y. State Mus. p 48. Ellis JS". A. F. 823 (a.) 



Spots small, numerous, irregular, indefinite, often confluent, flypha^ 

 hypophyllous, minutely tufted, abundant, short, thick, subflexuous, sub- 

 nodulose, colored, 25—40 long. Conidia very unequal in length, cylin- 

 drical to bacillary, slightly colored, 40—125 long, 3—7 septate. The 

 tufts of hyphse are so numerous and crowded as to form a continuous, 

 velvety stratum. 



