72 
Journal of Mycology. 
[Vol. 8 
Hypophyllous on brown, dead areas of the leaves. Hyphae 
mere conical points on a brown, sphaeriform base, bearing abun¬ 
dant, slender, curved, faintly nucleate, nearly hyaline conidia, 
acute at each end and 50-70x2^-3 (x. 
Very distinct from all the other species described on Vitis. 
The effused tufts look like a thin, mouse-colored down. 
Cercospora tageticola E. & E.—On leaves of Tagetus pa- 
tula which it soon blackens and kills. 
Hyphae in loose, spreading tufts, 200-300x4 [x, geniculate 
and septate. Conidia filiform about as long as the hyphae, 
thickened, 6-8-septate near the base and when well developed, 
constricted at the septa and 5-6 jx thick. 
Differs from the original C. canescens E. & M. principally 
in its longer hyphae and conidia. 
Cercospora cydoniae E. & E.—On leaves of Cydonia ja- 
ponica. 
Spots amphigenous, irregular in outline, 1-3 mm. diam., 
definite but without any raised border, subconfluent, dark brown, 
almost black above; hyphae epiphvllous, tufted, short, 15- 
20X2J-3 fx , continuous, subgeniculate, pale-yellowish under the 
microscope. Conidia mostly curved, subcylindrical, hyaline or 
with a very faint shade of yellow, 30-45x2^ ix , nucleolate, be¬ 
coming 1-3 septate. 
Under the pocket lens the tufts of hyphae with the conidia 
appear like minute cinerous specks. 
Cercospora richardsoniae E. & E.—On leaves of Richard- 
sonia scabra. 
Hyphae amphigenous, tufts effused more or less over the 
entire leaf, forming an olivaceous coat, few in a tuft, subundulate 
above and sparingly toothed, continuous or sparingly septate, 
20-40X3-3J tx . Conidia long and slender, gradually attenuated 
above, faintly 3-5-septate, with a slight yellowish tint, 75-90x3 fx. 
Cercospora maclurae E. & E.—On living leaves of Maclura 
aurantiaca. 
Hypophyllous, forming irregularly shaped, olive-green 
patches 2-4 mm., diam., partly limited by the veinlets of the leaf 
but not on any definite spots; hyphae cespitose, short (8-10x5 //. 
continuous, nearly hyaline. Conidia obclavate. the lower br^Ur 
part olive brown, 5-7-septate and slightly constricted ai the septa, 
abruptly contracted above into a cylindrical, subhyaline beak 
which forms about half the length of the spore. 
Cercospora sedi E. & E.—On living leaves of Sedum sp. 
Amphigenous, effused, giving the leaves a smoky look. 
Hyphae fasciculate, continuous or faintly septate more or less 
sinuous or crooked, short, 15-25x4 /*. Conidia straight, guttu- 
late, 30-110X2J-3 fx with a slight brownish tint. 
