The 
Plant World 
a jttaga?tne of popular iBotaup 
VOLUME 8 
NUMBER 9 
SEPTEMBER, 1905 
Containing 
Outlines for the Observation of Some of The More Common 
Fungi. Professor George F. Atkinson .. 215 
A Practical Rule for Tree Planting , . ...... . . 222 
The Barley Corn. I. Some Points of Structure. Professor Francis 
E. Lloyd . . . .. 223 
The Teachers Department : 
Are Potato Tubers Caused by a Fungus ? ...... 232 
Outline of a Course in Plant Culture. Asa Kinney ..... 234 
Lancaster, Pa. & New York 
Copyright. 1 905, by Francis Ernest Lloyd. 
Entered as Second-Class Matter February q, iqoy, at the Post-Office, at Lancaster, Pa., under the 
Act of Congress of March j, i8yq. 
