1898 | THE DEVELOPMENT OF SOME ANTHRACNOSES 85 
On bean stems there is scarcely any development of mycelium, 
The conidia do not remain collected in heaps, but spread over 
the stems or collect in a dense layer on the surface of the 
infusion. The cultures in the tubes are also characterized by the 
uniform yellow tinge. No stroma develops in the cultures, and 
the colored club-shaped bodies are not formed either in agar, 
in bean stems, or in a hanging-drop. 
The characters are as follows: acervuli for a long time 
covered, finally erumpent, situated on black depressed spots. 
Basidia short ; conidia sometimes borne on intercellular hyphe, 
hyaline, elliptical, ends acute, 7-12-15 2-3. On spathes of 
Spathyema fetida. 
GLa@OsPORIUM NERVISEQUUM (Fckl.) Sacc. (figs. 73, 53-61) ; 
on oak (Quercus), sycamore (Platanus). Co. 
This species may be easily recognized on the host by the 
shrunken withered veins of the leaves bordered by arid brown 
patches. The fungus causes the leaves to curl and become 
much distorted in appearance. The conidia, which may be 
found from early in June until November, are distinguished 
from the usual type of Gloeosporium by their ovate pyriform 
contour, some being so constricted at one end as to appear 
almost stipitate. Others are more regular in shape, ovate-oblong 
or oblong, measuring 10-12 X 4.5—5M. 
Owing to the slow growth after germination has taken 
place, considerable difficulty was experienced in obtaining a 
Separation culture, as it was closely associated upon the leaves 
with cladosporium, a pycnidial form, and other rapidly growing 
fungi. 
In several unsuccessful attempts to obtain a culture from 
affected oak leaves, a peculiarity in germination was observed; the 
germ tube, which had a bulbous swelling at the base, made a short 
curve near its origin, sometimes encircling the conidium ina 
close coil. After germination had been observed the pieces of 
agar containing the germinating conidia were transferred to 
infusions of oak leaves. No satisfactory growth, however, 
