332 A TEXTBOOK OF BOTANY [Ch. VI, 10 



external tube, or corona, of the Daffodil to be. Precisely 

 the same is true of the gamopetalous corolla, and also of the 

 monadelphous stamens, although in cases where the stamens 

 are united, as in the Composite, these anthers do actually 

 grow together although they originate separately. As to 

 the carpels, where two or more unite into a single pistil, 



Fig. 229. — Fuchsia speciosa, showing the raceme of morphologically 

 specialized flowers, with inferior ovary, and both petals and stamens raised 

 on the calyx tube. (From Bailey.) 



the case is quite clear, for they always originate separately 

 in the bud, and later actually grow together as they develop. 

 The mode of fusion of the carpels determines the place of 

 the placenta? and the number of compartments (unfor- 

 tunately called cells) in the ovary. Thus in the Pulse family, 

 illustrated by the familiar green Pea, only one carpel is 

 concerned, and it infolds with a single parietal placenta 

 (Fig. 227). When two or more carpels unite to one pistil, 



