The Botanical Gazette 
A Montbly Journal Embracing all Departments of Botanical Science 
Edited. by JouN M. CouLTER, with the assistance of other members of the botanical staff of the 
University of Chicago. 
Issued July 14, 1910 
Vol. Di : CONTENTS FOR JULY 1910 No. 3 
RATIO OF PHOSPHATE, NITRATE, AND POTASSIUM ON- ABSORPTION AND 
TH (WITH NINE FIGURES). ‘Oswald Schreiner and J. J. Skinner - 
CONTRIBUTIONS TO THE LIFE HISTORY OF WIDDRINGTONIA CUPRESSOIDES 
(WITH PLATES I-III AND THREE FIGURES) W, 7, Saxton : 31 
SOME PECULIAR FERN PROTHALLIA. ConTRIBUTIONS FROM THE HULL BOTANICAL 
E 
ABORATORY 137 (WITH ELEVEN FIGURES). Lula Pace - - 49 
PERIODICITY IN DICTYOTA AT NAPLES (wiTH ONE FIGURE). /. F. Lewis - we 
CURRENT LITERATURE 
BOOK REVIEWS : : : : x i ‘ : ‘ 65 
UNGOUS DISEASES OF PLANTS. THE MORPHOLOGY OF PLANTS 
i 67 
NOTES FOR STUDENTS - - - - - : - - - - 
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Entered August 21, 1896, at the Post-Office at Chicago, as second-class matter, under Act of Congress March 3, 1879. 
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