CONTENTS 
Page. 
BROWN, W. H. and HEISE, G. W. The application of photo- 
chemical temperature coefficients to the velocity of carbon 
dioxide assimilation 1 
BECCARI, O. The origin and dispersal of Cocos nucifera 27 
COPELAND, EDWIN BINGHAM. New species and a new 
genus of Borneo ferns, chiefly from the Kinabalu collections 
of Mrs. Clemens and Mr. Topping 45 
MERRILL, E. D. Koordersiochloa javanica Merrill, a new genus ' 
and sfiecies of Gramineae from Java 67 
u. s. 
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