ELISHA MITCHELL SCIENTIFIC SOCIETY. 6 1 



On leaves of Silphiiun compositiim^ 1198, Auburn, June 

 30, 1890, Atkinson. 



60. Cercospora Thaspii E. & E. Spots angular, 

 black frequently bordered by indefinite yellow, in age 

 becoming lighter in center, bordered by veinlets frequently, 

 thus giving the appearance of a narrow raised margin, 

 2 — 3 WW. Hyphfe amphigenous, subfasciculate, 3 — 8 in 

 a cluster, dark reddish brown, stout, 5 — 8 — septate, guttu- 

 late, 70 — 160 X 5 — 6, irregularly flexuous, geniculate and 

 sometimes branched. Conidia obclavate, hyaline, stout, 

 closely multiseptate, 60 — 120 X 5—6 at base. 



On leaves of Angelica hirsuta^ 154O5 Auburn, July 22, 

 1890, Atkinson; 2042, July 23, 1891, Duggar and New- 

 man. 



61. Cercospora depazeoides (Desm.) Sacc. Spots 

 amphigenous, angular or suborbicular, light brown below, 

 black or gre}'ish above with raised margin. Hyphge am- 

 phigenous, fasciculate, not strongly divergent, distantly 

 septate, dull reddish brown, irregularly flexuous, 100 — 200 

 X 4, 5. Conidia faintly tinged with same color, obcla- 

 vate, septate, guttulate, 50 — 100 X 4, 5. 



On leaves of Sanibiiciis canadensis^ 1760, Auburn, Sep- 

 tember 9, 1890, Atkinson. 



62. Cercospora Sagittarte E. & K. Spots amphige- 

 nous, angular or suborbicular, light brown, then blackish 

 with indefinite border of a lighter color. Hyphffi epiphyl- 

 lous, fasciculate, tufts few, fuliginous, simple, denticulate 

 above. Conidia hyaline, straight or curved, obclavate, 

 septate, stout, 40 — 100 X 4 — 5. This differs considerably 

 from N. A. F. 1502, but is probably only a variation from 

 that form. 



On leaves of Sagittaria variabilis^ 2039, Auburn, Juh* 

 24, 1 89 1, Duggar and Newman. 



63. Cercospora Bolleaxa (Thiim.) Speg. Spots yel- 

 low^ish and indefinite on upper surface, rusty beneath and 



