Feb., 1887.] CERCOSPORA, GLOEOSPORIUM, CYLINDROSPOR1UM. 
19 
Cercospora salicina, E & E.—On leaves of Salix nigra , Louisiana, 
September, 1880. Langlois, No. 783. Spots amphigenous, blackish, irreg¬ 
ular, more or less confluent and scattered thickly over the whole leaf, 
which appears as if blotched and spattered with some dark liquid; hyphse 
fasciculate in small, amphigenous tufts, brownish-subhyaline, short, 
12—20 x 3entire or sparingly toothed and sometimes branched above ; 
conidia obclavate, nucleate, subfuscous-hvaline, 25—40 x 2—24 p. 
Cercospora truncata, E. & E.—On living leaves of Vitis indivisa , 
Willd., Louisiana, November, 1886. Langlois, No. 780. Spots amphige¬ 
nous, dirty brown, darker above, indefinite, small, subconfluent, thickly 
sprinkled over the leaf, giving it a spattered look. The leaf soon 
becomes dead and dry around the margin; tufts hypophyllous, quite 
evenly distributed on the spots, forming subvelutinous, smoky, olive 
patches, which finally become gray; hyphse fasciculate, arising from a 
small, subtubercular base, cylindrical, simple, mostly straight and trun¬ 
cate above, the apex showing a round opening like the cross section of a 
tube, brown and only sparingly septate, 50—90 x 4—5 /■*; conidia slender- 
obclavate, hyaline, becoming 3—6-septate, gradually attenuated above 
into a long, slender point, 70—112 by about 4 ! J - at the base. This is very 
distinct from C. viticola (Ces.) Sacc. ( Oraphium clavisporum, B. & C.), 
but is closely allied to C. canescens , E. & M., from which it differs princi¬ 
pally in its more dwarfed growth and different habitat. 
Cercospora consobrina. E. & E.—On living leaves of peach trees, 
Louisiana, June, 1886. Langlois, No. 685. Spots amphigenous, small 
(2 millim.), rusty brown, at length well defined, purple bordered; hyphse 
epiphyllous in minute, scattered tufts, short 12—20 x 24—3 /*), subhya¬ 
line above and subdentate, arising from a small, tubercular base; 
conidia slender, hyaline, subcylindrical, 30—40 x 24 becoming faintly 
three or more septate. Very different from C. persica , Sacc. 
Cercospora verbenicoea, E. & E.—On leaves of Verbena Xutha , 
Louisiana. Langlois, No. 686. Leaves marked above and below with small 
(2—3 millim ), rusty-brown, indefinite spots; hyphse amphigenous, but 
mostly hypophyllous, fasciculate, few in a tuft, coarse (about 40x4/'-), sub- 
nodulose and irregular in outline, pale brown, 1—2-septate; conidia 
h> aline, nucleate, 30—50 x 24—3 /'-, subcylindrical, only slightly attenuated 
above. 
Cercospora Viguje, E. & E.—On leaves of Vigua luteola, Louisi¬ 
ana, October, 1886. Rev. A. B. Langlois. Spots amphigenous, small, 
irregular, reddish-brown ; tufts effused, smoky-olivaceous, forming velu- 
tinous patches not entirely confined to the spots ; hyphse short (35—45 x 
4—5 /'■), crooked, spreading, shouldered and subdentate above, pale brown, 
mostly continuous, hypophyllous; conidia slender, hyaline, nucleate, 
becoming 3—5-septate, 70—110 x 3 /'-. Cercospora canescens, E. & M., was 
also found on the same leaves, but is readily distinguished by its 
distinct black tufts and its longer, straighter hyphse and longer, broader, 
multiseptate conidia. Also quite distinct from C. Phaseolorum , Cke. 
