76 
hyaline, curved or moi$ rarely straight, elavate or flagellate attached 
by the truncate base and above attenuate to a subacute point, somewhat 
faintly multiseptate, not constricted at septa, variable in size, 55-175// 
long, 3-4£// in diameter at base and 1-3// in diameter at apex, mostly 
about 90-165// long; 3-4// in diameter at base, and 1 |-2/z in diameter 
at apex. On leaves of Lobelia syphilitica. St. George, Pottawatomie 
County, Ivans., September 29, 1888 (No. 1492). The mycelium of this 
species is rather abundant, hyaline, guttate, about 2-4// in diameter, 
but often alternately inflated and contracted, sparingly branched and 
septate, but near the tubercular bases it becomes many septate, thick, 
and slightly colored. These bases when young are seen to be com¬ 
posed of the enlarged many-septate bases of the liyphte, but when fully 
grown appear as a somewhat irregular mass of rather large cells. A 
few conidia were seen which had commenced to germinate. 
This species is very different from Cercospora effusa , (B. & C.) E. 
& E., which sometimes occurs on the same leaves. It also seems dis¬ 
tinct from Cercospora ochracea, Sacc. & Malbr., from which it differs, 
according to the description in Sacc. SylL, Yol. Ill, p. 447, No. 2151, in 
the character of the spots, the size of hyphse and conidia, and color of 
conidia. Besides, that species occurs on Lobelia urens in Europe. 
Cercospora euphorbia, n. s. Spots indefinite, merging gradually 
into the healthy leaf, dusky or sometimes almost black, but lighter 
(commonly cinereous dusky) in the center, occupying any portion or 
sometimes all of the leaf, suborbicular, |-2 cm in diameter, commonly 
about l cm ; tufts amphigenous but more abundant below, small, scarcely 
noticeable except in section, rather thickly scattered over the whole 
discolored area, but more abundant in the central portion, composed 
of from 3-15 (mostly 5-12) loosely diverging hyphae which generally 
arise through stomata, though they have but a very short subepider- 
mal portion ; hyplne dusky or brownish, cylindrical, tapering scarcely 
if at all, apparently having a round hole in the top, stout, simple, GO- 
120 by 4-7//, mostly 75-110 by 5-6//, sparingly septate, usually not 
constricted at septa, but sometimes very much so above, often spar¬ 
ingly subgeniculate or dentate from about the middle, usually showing 
but few marks of attachment of conidia; conidia rather abundant, hy¬ 
aline, very stout and thick, elavate or cylindrical, straight or slightly 
curved, attached by the larger blunt end, free and somewhat acute, 
plainly 8-15-septate, not constricted at septa, usually somewhat gran¬ 
ular within, very variable in size, 28-166// long, 3-6// m diameter at 
base and 1-5// in diameter at apex, mostly 50-120 long, 4-5// in diameter 
at base and 3-4// in diameter at apex. On leaves of Euphorbia, corol- 
lata. St. George, Pottawatomie County, Kans., August 13, 1888. (No. 
1494.) This species is rather rare, but is usually abundant on such 
host plants as are attacked. It does not seem to have much preference 
for upper or lower leaves, but attacks any. The mycelium is hyaline, 
sparse, sparingly branched, and septate (?), guttate, rather regular in 
size, 2-4// in diameter. The conidia are multiseptate even when small. 
