.Tax., 1888.] 
RAMULARIA AND CERCOSPORA. 
Cercospora verrascicola, E. & E.—On living leaves of Verbascum 
Thapsus. Delaware, Commons, No. 669. Maculicolous; spots amphigen- 
ous, round, dirty brown, whitening out, 2—4 millim. in diameter; hyphse 
slender, cylindrical, brown, septate, nearly entire above, 75—175 x 3 /■*, 
forming scanty, scattered tufts; conidia almost filiform, hyaline, dis¬ 
tantly septate, 100—150 x 3 p, mostly epipliyllous. 
Cercospora Sabbatee, E. & E.—On leaves of Sabbatia angularis , 
Faulkland, Del., August, 1887. Amphigenous; tufts scattered, minute, 
grayish; hyphse csespitose, continuous,, smoky-brown, 35—45 x 5 P, on a 
small tubercular base; conidia obclavate, subhyaline, 3—6-septate, 65—80 
x 4 p. There are no definite spots, but the parts of the leaf affected 
soon become yellow. 
Cercospora latens, E. & E.—On leaves of Psoralea argophylla. 
Kansas, June, 1887, W. T. Swingle. Epiphyllous, on dark brown, sub¬ 
continent, subindefinite spots, with which the leaves are thickly mottled; 
hyphse very obscure, 10—15 x 3 p, continuous, subhyaline, arising from a 
tubercular base ; conidia slender, obclavate, granular and nucleate, 
becoming multiseptate, 75—100 x 3 P. This is quite different from C. 
passalaroides, Winter, which has longer, stouter and darker hyphse and 
conidia. 
Cercospora Cuctjrbitas, E. & E.—On Oucurbita perennis. Man¬ 
hattan, Kaus., July, 1887, W. T. Swingle. Maculicolous; spots amphi¬ 
genous, round, subochraceous, soon becoming thin, white and semitrans¬ 
parent, 1—4 millim. in diameter, with border slightly raised; hyphse 
epiphyllous, tufted, olive brown, paler above, 70—80 x 4 continuous, 
subgeniculate above and obtuse at the apex; conidia linear-clavate, 
100—120 x 3—4 /'-, hyaline, granular and nucleate at first, becoming at 
length septate (multiseptate [V]) 
Cercospora Silphii, E. & E.—On fallen leaves of Silphium integri- 
folium. Manhattan, Kans., July, 1887, W. T. Swingle. Amphigenous, 
but more abundant below, on subangular, 2—3 millim., dirty white spots, 
with a raised border, or on the lower surface of the leaf more or less 
effused ; hyphse csespitose on a tubercular base^ pale brown, continuous, 
often Lorulose and crooked above and subdentate, 25—35 x 4 p\ conidia 
slender, nearly hyaline, nucleolate, becoming 4—6-septate, 70—80 x 3 p. 
The tufts of hyphse form minute black specks, easily seen with a pocket 
lens. 
Cercospora diffusa, E. & E —On leaves of Physalis lanceolata. 
Manhattan, Kans., July, 1887, W. T. Swingle. Spots none ; hyphse 
amphigenous but mostly hypophyllous, simple, short, 30—40 x 4—5 p, 
continuous, olivaceous, torulose and obtuse above, densely fasciculate in 
minute, punctiform tufts, which are scattered over the greater part of 
the leaf, but more densely collected in irregular groups and patches of 
one-half cm. or more in extent and causing the leaf at these points to 
turn slightly yellowish; conidia subcylindrical, slightly attenuated above, 
mostly 50—80 x 4 /', but sometimes elongated to 90 and 100 p and then 
