3i6 
ON A NEW CANKER-DISEASE OF PRUNUS YEDOENSIS, etc. 
20. Explanation of Plates. 
The microscopical drawings were done with the aid of a camera lucida. 
Plate VII. 
Fig. i. A young stage of the canker at the crotch of Prunus yedoensis. 
Fig. 2. Cankered branch of Primus yedoensis caused by Valsa japonica. 
Fig. 3. Diseased branch of Prunus Mume caused by Valsa japonica. 
Fig. 4. Cankered branch of Prunus yedoensis caused by Valsa japonica. 
Fig. 5. Diseased branch of Pnenus yedoensis caused by Valsa japonica. 
Fig. 6. Diseased branch of Prunus Mume caused by Valsa japonica. 
Plate VIII. 
Fig. 1. Diseased branch of Prunus sachalinensis caused by Valsa japonica. 
Fig. 2. Result of inoculation experiment on the seedling of Prunus 
yedoensis with the causal fungus' isolated from the same host. (Ino- 
culated in the old slit wounds.) 
P Inoculated point. 
C Check wound. 
Fig. 3. Result of inoculation experiment on Prunus Mume with the causal 
fungus isolated from Prunus yedoensis. 
P Inoculated point. 
C Check wound. 
Plate IX. 
Fig. 1. Section of matured ectostroma and pycnidium. (Prunus yedoensis). 
Zeiss A x 2. 
Fig. 2. Pycnospores. (Prunus yedoensis ). Zeiss F x 4. 
Fig. 3. Section of stroma showing perithecia and a pycnidium. (Prunus 
Mume). Leitz 1 x 3. 
Fig. 4. Ascospores and germinating ascospores in the cavity of perithecia. 
(Prunus Mume). Zeiss F x 2. 
