ELISHA MITCHELL SCIENTIFIC SOCIETY. 57 



divergent at distal end, though not nearly so much so as in 

 C. cercidicola and C. Pelersii {B. & C), though the sterile 

 part of the fascicle is much more compact than in the lat- 

 ter species. Hyphfc, where compacted into bundle 3, 5 — 4 

 in diameter, usually somewhat greater, 4 — 5, at the free 

 ends, dark olive brown. Conidia obclavate, abruptly 

 tapering at base, usually curved, 3—12 septate, sometimes 

 very distinctly so, same color as the hyplue, though more 

 dilute, 40—70 X 4 — 7. 



Common on cultivated grape leaves (Vitis), Auburn, 

 Atkinson. 



49. CercospoRxA Petersii (B. & C). Helminthospo- 

 riiun Petersii B. & C, Grev. III., p. 102 {ex-parfe?\ 

 Helminthosporiuju Petersii, Rav. Fung. Am. Ex., 166. 

 Spots amphigenous, light brown in center, with blackish 

 border, orbicular, 2 — 3 mm. Hyphre amphigenous, mostly 

 hypophyllous, fasciculate, very dark olive brown to nearly 

 black, septate, 100 — 300 X 4 — 4, 5, for about two-thirds 

 their length parallel and quite closely compacted into a 

 bundle, not so much so as in C. viticola, distal one-third 

 divergent and very profusely subflexuous, denticulate, 

 torulose, jagged, and diameter somewhat greater than the 

 straight portion. Conidia obclavate or narrowly tereti- 

 fusoid, abruptly acuminate, resembling in form those of 

 C. cerasella, but much darker in color, dark olive brown, 

 2 — 6 septate, 30 — 70, even sometimes to 100 X 5 — 6 at base. 



This is very different from C. smilacis^ Nos. 1676 and 

 1768 Myc. Univ., the conidia there being much narrower, 

 the hyph^e shorter and otherwise quite different. It differs 

 also from N. A. F. Xo. 1251. It also seems to be quite 

 different from Saccardo's description of his C. smilacina 

 (1. c.) and the figure in F. Ital., No. 681, but may be 

 identical. I have not seen specimens of Peck's C Smi- 

 lacis and cannot say whether or not it is the same as 

 this species, but I am inclined to think it is; the 

 4 



