190 REPORT OF THE BOTANIST OF THR 
EXPLANATION OF PLATE XXV., 
Fic. 1.— Peach twigs bearing the knots on which Helminthosporium 
spores are found. 
Fig. 2.—A peach affected with brown spot caused by Helmintho- 
sporium carpophilum Lév. 
Fia. 3.—Zwo Helminthosporium spores direct from a peach twig 
killed by the fungus. They represent the prevailing 
Jorms. . 
Fig. 4.—Zwo spores of H. carpophilum from peach fruit. They 
represent the prevailing forms found on the fruit. 
Fie. 5.—Five spores of Helminthosporium grown in a pure culture 
obtained from the knots shown in Fig. 1. 
Fic. 6.—A spore from the same culture germinated im sugar solu- 
tion. The normal method of germination. 
Fie. 7.—TZhree spores from the same culture germinated in dis- 
: tilled water. Abnormal germination. 
Fig. 8.—Mycelium and four newly formed spores grown in sugar 
solution. 
Figures 3-8 were drawn with the aid of a camera-lucida and 
all to the same scale. 
