372 
Colletotrichum Lycopersict, n. sp. 
Spots depressed, circular, slightly discolored, center black, 
5—Io # in diameter, afterwards becoming irregular and confluent. 
Acervuli abundant, densely gregarious, rusty brown to black, 
applanate, 95-150 mm. in diameter. Sete abundant, fulignous, 
generally curved, rarely undulate or straight, often geniculate in 
places, gradually tapering, septate, length 65-112 4, about 5 at 
base. Spores oblong 16-2244, average 18-204, ends sub- 
acute, hyaline, generally containing two to three oil drops which 
stain brown with osmic acid. Basidia short, slender, 30-40 /, 
arising from a well-developed stroma. On fruit of cultivated 
tomato. 
A LEAF SPOT OF CELERY. 
Not long since some celery leaves were brought into my lab- 
oratory by a local gardener with the complaint that his celery 
plants were suffering badly. To general appearance the affection 
seemed to be the ordinary leaf blight, (Cercospora Api, Fres.), 
but closer observation showed the spots to be covered with 
numerous black pustules, which upon further examination proved 
to be the pycnidia of a Septoria. 
Examinations were at once made in other celery gardens, and 
in all the same disease was found. The effect upon the plant is 
very similar to that of the well known leaf blight, causing in 
extreme cases a complete wilting of the leaves, and in the case 
of younger growths a complete destruction of the entire plant. 
The spores, which germinate readily in water, were sown 
upon healthy leaves with the result that in fifteen days the char- 
acteristic spots were produced at the points of infection, upon 
which were developed pycnidia containing the spores of this’ 
fnngus. The fungus of the disease is apparently distinct from 
Septoria Pastinace, West, and from S. pastinacina, Sacc., both 
found on Pastinaca sativa, L.; the former species having larger 
and septate spores, while the Seféoria on celery is to all appear- 
ance non-septate. The latter species differs in having much - 
smaller spores (20-30/4X 7-1 ym) and larger pycnidia (120-150 4). 
The fungus, according to the opinion of Mr. J. B. Ellis, is 
more closely related to Septoria Petroselini, Desm., but is prob- 
ably not identical with it. 
Through Dr. D. H. Halsted I am informed that Briosi has 
_ named a variety of the last species, i. e. S. Petroselini, var, Api, 
