CONTENTS 



Gardner, Nathaniel Lyon. New ]\I.yxophyeeae from Porto Rico 



(witli plates 1-23) 1 



Stout, A. B. The flower behavior of avocados (with plates 24-28 



and charts 1-10) 145 



RusBY, H. II. Descriptions of new genera and species of plants col- 

 lected 'on the Mulford Biological Exploration of the Amazon 

 Valley, 1921-1922 (with eight text-figures) 205 



HoLLicK, Arthur. The flora of the Saint Eugene silts, Kootenay 



Valley, British Columbia (with plates 29-47) 389 



Published by aid of the 

 DAVID LYDIG FUND 

 Bequeathed by Charles P. Daly 



NEW YORK 



1927 



