Volume LXVIII Numbers 



THE 



Botanical Gazette 



Editor: JOHN M. COULTER 



NOVEMBER 1919 



Chemical Constituents of Amaranthus retroflexus. Contributions from 



the Hull Botanical Laboratory 254 - - - - - M. L. Woo 313 



(With eleven, figures) 



Staminate Strobilus of Taxus canadensis. Contributions from the Hull 



Botanical Laboratory 255 - - - - - A. W. Duplet 345 



(With Plates XXIV-XXVI and twenty-two figures) 



Colloidal Properties of Bog Water - George B. Rigg and T.G.Thompson 367 



Vegetation of Undrained Depressions on the Sacramento Plains 



Francis Ramaley 380 



(With one figure) 



Briefer Articles 



V 



Aaron Aaronsohn - - - _ _ _ _ - J. M. C. 388 



(With portrait) 



Current Literature 



Book Reviews ----------- 390 



Notes for Students - - - - - - - - - -391 



The University of Chicago Press 



CHICAGO, ILLINOIS, U.S.A. 



THE CAMBRIDGE UNIVERSITY PRESS, London and Edinburgh 



THE MARUZEN-KABUSHIKI-KAISHA, Tokyo. Osaka, Kyoto, Fuhuoka, Sendai 



THE MISSION BOOK COMPANY. Shanghai 



