132 BOTANICAL GAZETTE [aucust 
toward the level of monocotyledons, and the conclusion is borne 
out by the female gametophyte. 
The writer is indebted to Professor Joon M. CoutTEr for sug- 
gestions and criticisms, and to Dr. W. J. G. Lanp for the material 
used and for direction and encouragement during the investigation. 
UNIVERSITY OF CHICAGO 
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