Che Botanical Gazette 
A Monthly Fournal een ge all Departments of Botanical Science 
Edited by JoHN M. CouLTER and CHARLES R. BARNES, with the assistance of other members of the 
botanical js of the University of Chi 
Issued April 19, 19130 
Vol. XLIX CONTENTS FOR APRIL 1910 No. 4 
THE CELL STRUCTURE OF CLOSTERIUM hae ei a AND CLOSTERIUM 
MONILIFERUM (WITH PLATES XVII AND xvi). &. FZ ~ 241 
Be peieuead AND VEGETATION IN COLORADO (went SEVEN Or WW. 
Robbin 256 
THE ose pagy DEVELOPMENT AND EMBRYOGENY OF ERIOCAULON SEPTANGU- 
LARE (WITH PLATES XIX AND Xx). R&. Wilson Smith - 281 
THE CLOSING RESPONSE IN DIONAEA ied ONE » PICURR). William H. Brown and . 
Lester W. Sha orbit : Scan - - _ 290 
BRIEFER ARTICLES 
ABNORMAL BRACT-MODIFICATION IN COTTON (WITH ONE FIGURE). H. A. Allard - 303 
THE BIOLOGICAL ANTAGONISM BETWEEN CALCIUM AND MAGNESIUM. Oscar Loew - 304 
CURRENT sisi ius 
> “O85 
eerie IN BELGIUM. A NEW MANUAL OF ROCKY MOUNTAIN BOTANY. 
NOTES FOR STUDENTS - - - - - 308 
- 
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