Fkb. , 1887.] CERCOSPORA, GLOEOSPORIUM, CYLINDROSPORIUM. 
21 
Oercospora pallida, E. & E.—On living leaves of Tecoma radi¬ 
calism Louisiana, September, 1886. Langlois, No. 797. Spots amphigen- 
ous, indefinite, more or less confluent, causing the leaf to turn yellowish 
or oftener purplish in spots which at length become blackish above and 
rusty-brown below ; hyplise fasciculate, mostly few in a fascicle, short, 
15—20 x 3 /*, pale brown, subnodulose, arising from a small tubercular 
base, the tufts thickly scattered over the discolored areas ; conidia sub- 
cylindrical, nearly hyaline, granular or nucleate, becoming 3—5-septate, 
30—55 x 2— 2i !>■. C. sordida , Sacc , is of a more robust growth and dark, 
olivaceous color. 
Cercospora racemosa, E. & M., lias been found also on Ambrosia 
tripida. Kansas (Kellerman, No. 879). 
Gloeosporium aridtjm. Ell. & IIolw.—On living leaves of Fraxinus 
Americana , Racine, VV r is., June, 1886. Dr. J. J. Davis. Spots amphigen- 
ous, yellowish-brown, definite, irregular, 2 or more cm. across, rendering 
the substance of the leaf brittle, so that it easily breaks away ; acervuli 
lnpophyllous, pale, numerous, small; spores oblong or oblong-elliptical, 
hyaline, 2-nucleate, 5 -8x24 — 31 p. Differs from G. fraxineum , Pk., in 
the large, irregular spots aud from G. punctiforme , E. & E., in its differ¬ 
ent spots and much smaller spores. 
Gloeosporium yltcglegenum, E. & E.—On living leaves'of Yucca 
flamentosa , Columbia, Mo., August, 1886. B. T. Galloway, No. 115. 
Acervuli gregarious, small, erumpent, pale ; spores cylindrical, mostly a 
little curved, granular, some of them 1—2-nucleate, ends obtuse, 20—25 x 
4—6 /'-. 
Gloeosporium punctiforme, E. & E.—On living leaves of Fraxinus 
Americana , Delaware A. Commons, No. 287. Leaves faintly mottled 
above with yellow specks ; acervuli erumpent on the under side of the 
leaf, exuding pale yellowish masses of spores which are of an oblong 
shape, 15—22 x 7—8 /'•, strongly constricted in the middle and uniseptate, 
ends obtuse. Quite different from G.Fraxini , Hark., or G f raxineum , Pk. 
Gloeosporium acerinum, Pass.—On leaves of Acer dasycarpum , 
Columbia, Mo., July, 1886. B. T. Galloway. Spots amphigenous, small, 
irregular and subangular, thickly scattered over the leaf, dirty brown 
with a shaded yellow border, causing the upper surface of the leaf to 
appear mottled with yellow; acervuli subcutaneous, erumpent on the 
lower surface of the leaf in small, pale, amber-colored masses; spores 
cylindrical, curved, 1-septate, 18—22 x 3 p. The specimens in Thumen’s 
Mycotheca (No. 93) have the spores 3-septate—Saccardo, in Sylloge, says 
“spuriously biseptate.” The general appearance of the Missouri speci¬ 
mens is the same as that of de Thumen’s specimens and it is not improb¬ 
able that when mature they may become 3-septate. 
Cylindrosporium Humuli, E. & E.—On living leaves of ? culti¬ 
vated hops ( Humulus lupulus). Faulkland, Del., September, 1886. A- 
Commons, No. 357. Spots amphigenous, but mostly hypophyllous, small, 
angular, limited by the veinlets of the leaf, rusty-brown; acervuli minute, 
black, amphigenous; conidia nearly cylindrical, hyaline, granular and 
nucleate, 40—50 x 3 M, oozing out in thick whitish cirrhi and soon diffused 
as a white film or coat over the surface of the spots. 
