PAPERS ON BOTANY 223 
tenuis which has under different environmental conditions 
become changed, It is a question whether their behaving dif- 
ferently when inoculated on apples is sufficient reason for 
their being considered as distinct species. 
CONCLUSIONS 
More work will have to be done before it can be determined 
definitely how this spot is formed. Although Alternaria has 
been found in every case, it may or may not be the direct 
cause. The time and method of entering the fruit will have 
to be determined in the orchard. Nothing certain can be said 
with regard to it until a typical spot has been reproduced by 
inoculation, but the presence of the Alternaria in the spots 
seems significant. 
REFERENCES 
Morse, W., Maine Ag. Exp. Sta., Bul. 164, 1908. 
Stakman, L. C. and Rose, R. C., Phyto. 4:333, 1914. 
Longyear, B. O., Col. Agr. Exp. Sta. Bul. 105: 12, 1905. 
Cook, M. T., and Martin, G. W., Phyto. 3:119, 1913. 
Scott, W. M., Phyto. 1:32, 1911. 
Norton, J. B. S., Phyto., 3:99, 1913. 
Brooks, Fisher, Cooley Exp. Sta. Rec. 33, 1914. 
Be ah ea le SS EL Us 
AN APPLE ROT CAUSED BY GLIOCLADIUM VIRIDE 
The fungus upon which this paper is based was found on 
several petri dishes in which cultures were made while isolat- 
ing fungi from diseased apples. When inoculated on healthy 
fruit it produced a typical, dry, brown rot. 
THE FUNGUS 
The mycelium of the fungus is hyaline, septate, branching, 
and varies from 1.8 to 3.6 microns in width (Plate IV. Fig. 1). 
The conidiophores are formed as in Penicillium. They grow 
erect from the internal mycelium, branching once to many 
times (Plate IV. Figs, 7, 8, 9). They are hyaline, septate, and 
can be differentiated from the aerial mycelium only by the pro- 
fuse branching, These branches become brush-like as in Pen- 
icillium (Plate IV., Fig. 13.) 
