Diandrae on the one hand and the Monandrae on the 
other. 
Evidence is presented in favor of the appendicular 
theory of the gynostemium, in opposition to the views of 
those who consider it to be a prolongation of the floral 
AXIS. 
I am very thankful to Professor R. H. Wetmore for 
kindly reading the manuscript and offering valuable sug- 
gestions for improvement in presentation. 
[ 94 ] 
