1898 | THE DEVELOPMENT OF SOME ANTHRACNOSES 83 
GLaOSPORIUM MUSARUM Cke. & Mass. (jig. 77), on banana 
(Musa paradisiaca). 
The anthracnose of bananas is quite commonly found on 
ripe bunches of the fruit in warm weather. The fungus appears 
in roseate, innate, erumpent, gregarious acervuli on blackened 
spots of the fruit. These spots spread over the entire fruit, and 
the underlying tissue becomes disorganized. The conidia 
are elongate, ellipsoidal, rounded at each end, usually with a 
Single vacuole, and measure 16-18 X 4 p.” 
The material from which the first cultures were made was 
obtained from Ellis & Everhart’s N. A. F. no. 3178. Conidia 
from the material collected in July 1894 germinated readily 
when sown in November of the same year. Germination takes 
place in the ordinary manner, one or two germ tubes originating 
at or near the end of the conidium. The conidia remain single- 
celled upon germination. Growth is rapid and the first crop of 
conidia in potato-agar appears the second day after sowing. 
The colonies have at first a stellate appearance, which becomes 
more or less obscured with further growth. -Hyphal growth is 
Sparse at the center, and the mycelium radiates in more or less 
straight lines. The flocculent or feathery radiations extending 
from the center to the margin give the colony a characteristic 
appearance. It is at first grayish in color, and assumes a buff 
tinge when the acervuli appear, which are scattered irregularly 
over the surface. Very little mycelium is developed on bean 
stems, but a compact grayish mat spreads over the surface of the 
infusion. Over this mat, as well as on the bean stems, the acer- 
vuli are produced in great abundance. They are comparatively 
large and attended with the development of a stroma, which 
does not spread thickly over the stems as in G. cactorum, frac 
genum, and phomoides. Its entire growth marks it as a species 
distinct from the others that have been studied. The fungus 
readily adapts itself to various nutrient media. Although grow- 
ing upon soft tissue on its natural host it shows a vigorous growth 
tls original description in Grevillea (16:3), gives the spore measurements 
12X qu. 
