The Botanical Gazette 
A Monthly Fournal Embracing all Departments of Botanical Science 
Edited ps Joun M. CouLTER, with the assistance of re. members of the botanical staff of the 
University of Chica 
Issued December 19, ni 
Vol. a | Sent FOR DECEMBER 1911 No. 6 
LIGHT 1 INTENSITY AND: TRANSPIRATION (wits OnE FIGURE). Burton Edward Livingston 417 
| THE EMBRYO SAC OF EPIPACTIS (wits priate x). William H. Brown and Lester W. Sharp 439 
THE OXYGEN MINIMUM AND THE GERMINATION OF XANTHIUM SEEDS. Con- 
TRIBUTIONS FROM THE HuLt BoTanrcAL LABORATORY 152 es ONE Hee: Charles 
Albert Shull - > < = se Pi 
- BRIEFER ARTICLES 
3 Be prs OF OpHIocLossum eae ONE FIGURE). W. J. G. Land - - - -. 478 
= CURRENT PEEVE: 7 
oe _ MINOR NOTI So ee a Be ee 
_ NOTES FOR iis De ee Res a eee ee ee ie ae as 480 
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