May 1903] Two New Species of Cercospora. 
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TWO NEW SPECIES OF CERCOSPORA. 
J. B. ELLIS AND W. A. KELLERMAN. 
Cercospora ^sculina Ell. & Kellerm. n. sp. On leaves of 
Aesculus octandra. Marlinton, W. Va., Aug. 1902. (W. A. 
Kellerman.) Fig. 1. 
Hypophyllous, scattered over the lower face of the leaf and 
forming small spheriform tufts resembling somewhat the peri- 
thecia of Sphserella, but not on any spots though the upper sur¬ 
face of the leaf is marked with minute, snow-white, punctiform 
Fig. 1. Conidiophores and conidia of Cercospo- Fig. 2. Conidiophores and conidia of Cercospo¬ 
ra sesculina Ell. & Kellerm. ra guttulata Ell. & Kellerm. 
spots. Hyphse cespitose, pale-brown, nearly straight, 2-3-septate, 
slightly toothed above, bearing conidia 60-70x5-6^, abruptly 
contracted above and often distinctly constricted at one of the 
septa. 
Cercospora guttulata Ell. & Kellerm. n. sp. On leaves 
of Aristolochia macrophylla. Marlinton, W. Va., Aug. 1902. 
(W. A. Kellerman.) Fig. 2. 
Spots amphigenous, suborbicular, dirty gray with a narrow, 
nearly black border, -|-i cm. diam. Hyphse short (15-20 x 3-4 /a ), 
amphigenous, but more abundant below, densely tufted, the tufts 
thickly scattered on the spots, cylindrical, straight or subundulate, 
simple, obtuse at the apex, nearly hyaline. Conidia cylindrical or 
slightly narrowed above, moderately curved, multiguttulate, be¬ 
coming multiseptate, 45-80 x 4-5 n , nearly hyaline. 
Differs from C. serpentaria E. & E. and C. olivacea Sacc. 
in its much shorter hyphse, and from the latter also in its curved 
conidia. 
