74 MEMOIRS OF THE NEW YORK BOTANICAL GARDEN 



Corrcns and Bateson's results on Bryonia dioica and B. alba 

 in the light of their interpretations would establish that one or 

 the other of the sexes of Bryonia dioica has two kinds of gametes. 

 The work on Merciirialis annua appears to negative the above as- 

 sumptions. Mercurialis does this by recording its own so-called 

 gametic constitution in the selfed males and selfed females. 



The present work was begun in February, 1914, under the 

 direction of Professor R. A. Harper. 



I 



