Feb., !887.] CERCOSPORA, GLOEOSPORIUM, CYLINDROSPORIUM. 
15 
characters very different. *1 he patches of hyphse are, however, less 
definitely limited and the hyphse themselves and the conidia maybe a 
little shorter, and as the host-plants belong to different natural orders, 
it is perhaps best to regard the parasite on Vernonia as distinct. From C. 
Vernonice, E. & K., and C. oculata , E. & K., this will be separated on 
account of the entire absence of any definite spots. This also much 
lesembles C. Diospyri , Thum. 
Cercospora Lycopi, E. & E.—On living leaves of Lycopus rubellus , 
St. Gabriel, La., September, 1886. Langlois, 522. Spots ampliigenous, 
indefinite, dusky brown, 3—4 millim.; hyphse hypophyllous, in minute 
tufts, short (15—25 /'•), pale brown, continuous, subdentate above; 
conidia obclavate, yellowish-hyaline, multinucleate, 50—75 x 24—3 P-. 
Cercospora Sorghi, E. & E — On leaves of Sorghum Halapense, 
Plaquemines Co., La , August, 1886. Langlois, No. 543. On Zea Mays, No. 
643. Leaves stained dark purple, in strips of several inches in extent, the 
colored part becoming dead and dry ; hyphse amphigenous, in minute, 
scattering tufts on the dead part of the leaf, few in a tuft, brown, trun¬ 
cate above and laterally subdentate, 60—80 x 4 /'-^continuous or sparingly 
septate below ; conidia slender, faintly three or more septate, 70—80x3 /'-, 
hyaline. The tufts of hyphse are so minute as to be barely visible with a 
lens. In the var. on Zea Mays , there is no purple stain on the leaf, but 
brown. 
Cercospora Columbiensis, E. & E.—On Ionidium concolor , Colum¬ 
bia, Mo. Galloway, No. 71. Spots amphigenous, small (1 millim.), round 
white with a black border, thin ; hyphse mostly epiphyllousin minute tufts 
from a small tubercular base, pale brown, simple, entire or somewhat 
toothed above, 35—55x4—5 /'-, continuous ; conidia hyaline, slender, 4-5- 
septate, 60—80x3 /'- at the thick end. The tufts of hyphse are not abundant, 
1—4 only on a spot usually. This is evidently closely allied to the South 
American species, C. Tandilensis , Speg., on Ionidium glutinosum , but 
differs in its much smaller spots and narrower conidia, which are not 
constricted at the septa. 
Cercospora Pancratii, E. & E.—On leaves of Pancratium cor- 
onarium , Louisiana, June, 1886. Langlois, No. 656. Spots amphigenous, 
oblong, 1—2 cm. long by £—1 cm. wide, of a dull red color and mostly 
with a narrow, raised border; tufts amphigenous, scattered, minute; 
hyphse arising from a sphseriseform base, short (15—25 x 3 /'-), brown ; 
conidia narrow, subfuscous, nucleolate, subattenuated above, 40—50 x3 /'-. 
Cercospora Elephantopi, E. & E.—On leaves of Elepliantopus Car- 
oliniensis , September,Delaware (Commons,No.75), Mo. (Galloway, No.140.) 
Spots indefinite, dirty brown, surrounded by a dark, purplish-shaded 
border, 2—4 millim. in diameter, more obscure below; tufts subeffused, 
forming velvety, smoky brown or mouse-colored patches, which finally 
assume a bluish tint; hyphse amphigenous, but more abundant below, 
short (25—35 x 3 /'•), continuous, smoky-brown, simple and nearly entire ; 
conidia slender, 75—100 x 3 /'-., multinucleate, yellowish-hyaline, gradu¬ 
ally attenated above. 
