^ 



Volume LXVII 



Number 5 



THE 



Botanical Gazette 



Editor: JOHN M. COULTER 



MAY 1919 



Effect of Anesthetics upon Respiration - 



(With seven figures) 



A. R. C. Haas 377 



Basis of Succulence in Plants 



D. T. MacDougal, H. M. Richards, and H. A. Spoehr 405 



A Coniferous Sand Dune in Cape Breton Island 



(With eight figures) 



- LeRoy H. Harvey 417 



Embryo Sac and Embryo of Pentstemon secundiflorus. Contributions 



from the Hull Botanical Laboratory 248 - 



With Plate Xn 



Briefer Articles 



Depressed Segments of Oak Stems 



. (With four figures) 



Importance of Epidermal Coverings 



(With two figures) 



Current Literature 



Notes for Students ----=■ 



Arthur T. Evans 427 



I. W. Bailey 438 



R. B. Harvey 44 1 



- 445 



The University of Chicago Press 



CHICAGO, ILLINOIS, U.S.A. 



THE CAMBRIDGE UNIVERSITY PRESS, London and Edinburgh 



THE MARUZEN-KABUSHIKI-KAISHA. Tokyo, Osaka. Kyoto. Fukuoka. Smndai 



THE MISSION BOOK COMPANY. Shanghai 



