The 
lant World 
1 
Pi 
a j¥taga?we of popular OBotaup 
VO L U ME 8 
NUMBER 5 
MAY, 1905 
Containing 
The Earliest Local Flora. Professor Edward L. Greene . 115 
The Gas Plant. Professor W. J. Beal ...121 
The Monsoon Dust of the South Atlantic Ocean. C. S. G . j 24 
The Chimney Shaped Stomata of the Burro Thorn. M. E. H. L. . . 126 
The Teachers Depa tment. 
Moulds as the Cause of Disease. A. W. . . .128 
Notes on Regeneration. W. J. R. .131 
Anthers of the Compositae. L. ......... ... 131 
Effect of Winds on the Leaves of the Grape Vine. L.132 
Mimicry in Plants. . . . . 132 
Cork Columns on the Sweet Gum. L. . . . . ... . . . . . . 133 
Unifoliate Species of Streptocarpus ...134 
Announcement of a Field Symposium at Ohio Pyle, Pa . 134 
Reviews : De Vries Species and Varieties : Their Origin by Mutation 
(continuance) . . . .... .' ___ .___ _ _135 
Summer Courses in Botany... . .137 
Lancaster, Pa. & 
Copyright, 1905, by Francis Ernest Lloyd. 
New York 
Entered as Second-Class Matter February g, igoj, at the Post-Office, at Lancaster, Pa., * under'-the 
Act of Congress of March 3,187g. 
> V^'onsl Mil 
