TABLE OF CONTENTS 



PAGE 



Sporogenesis in Nephrodium. Contributions from 



Shigio Yamammchi t 



M, Louise Nichols 31 



James Ellis Gow 38 



the Hull Botanical Laboratory 106 (with plates 

 I-IV) 



The development of the pollen of Sarracenia (with 

 plate V) 



Embryogeny of Arisaema triphyllum (with twenty- 

 four figures) ------- 



The toxic effect of certain common salts of the soil on 



plants (with one figure) ----- Florence N, Magou*an 45 



The toxic action of certain organic plant constituents 



(with seven figures) - - Oswald Schreiner atid Howard S. Reed 73 



Some new cases of ^Mendelian inheritance (with four 



figiu"es) ------- George Harrison Shull 103 



The antagonistic action of magnesium and potassium 



(with three figures) - - - - - - W. J, V. OskrhotU 117 



Nereocystis and Pelagophycus - - - William Albert SelcMl 125 



Spermatogenesis, oogenesis, and fertilization in Ne- 

 phrodium. Contributions from the Hull Botan- 

 ical Laboratory 107 (with plates VI-VTII)- - Shigio Yainanoiichi 145 



The carbon assimilation of Penicillium. Contribu- 



nine figures) 



Laboratory 108 Heinrich Hasselhring 176 

 vaporation (with 



- Edgar N, Transeau 21 j 



Further studies of solution tension and toxicity in 



fig! 



mond H. Pond 232 



and thirty graphs) - ^- - - - . Grace Lucretia Clapp 254 

 Apogamy in Nephrodium. Contributions from the 



Hull Botanical Laboratory 109 (with plates Ev 



and X, and three text figure) - - - - Shigio Yatnanotichi 289 

 Alpine vegetation in the vicinity of Long's Peak 



Colorado (with eight figures) - - - - William S. Cooper "319 



m^aqjores to embr}'o sacs m angio 



HuHBotani 



Laboratory 



Coulter 361 



ology and development of some anthrac- 



(with seventeen %ures and plate XI) Claude Wilbur EdgerUm 367 



V 



! 



