1899] BRIEFER ARTICLES 471 
fg. g, the same mycelium is shown in a longitudinal section of the rice 
culm, eight inches below the panicle. 
In cross sections of a rice culm, about one half of the sub-epidermal 
tissues are stereome, lying between the strips of chlorophyll parenchyma 
(fig.3,A,c,and B,s). The mycelium is never present in this stere- 
ome, nor in the fibro-vascular bundles and colorless parenchyma in the 
interior of the culm. 
Cross and longitudinal sections of the rachis also showed the pres- 
ence of the same mycelium. 
eens 
bes, ba 
TX 
Fic, 3. ENG. 4 
Fic. 3.—A-: Cross section of a rice culm with diseased spikelets, about eight 
thes below the panicle; a, colorless parenchyma ; 4, chlorophyll parenchyma ; cs 
_ Slereome ; ¢, fibro-vascular bundles : 
8B: Magnified portion of stereome and chlorophyll parenchyma areas; ¢, epider- 
oa 4 chlorophyll parenchyma; g, two stomata; ™, mycelium ; s, stereome. 
| e culm about eight inches below the 
4.—Longitudinal section of a ric paren- 
Fic. 
Panicle; a, epidermis; 4, stereome; ¢, chlorophyll parenchyma; 4, ee 
“ayma ; e, mycelium. 
The Presence of this mycelium in the rice culms shows, no doubt, 
that this smut infects the rice plant in the same way that ie 
fevis Kithn and 7 caries Tul. infect the young seedling at the time 
_ the germination of the wheat grain. 
