Flowers. 



205 



the outer wall of the ovary (d, C), the pistil is called 

 inferior and the flower epigynous. In determining the 



iff 



Diagrammatic representation of the embryology of (A) hypogynous, (B) perigy- 

 nous, and (Cand D) epigynous flowers. The receptacle is dotted, the sepals 

 and stamens are unshaded, the petals are black, and the pistil ruled horizontally. 

 In such flowers as B and D the tubular extension of the receptacle, commonly 

 called the tube of the corolla, may be considered a distinct member of the flower, 

 termed the ring leaf. (See Ganong, " The Teaching Botanist.") After GANONG. 



