110 THE SECOND BOOK OF BOTANY. 



with an adherent calyx-tube, as in composite (Fig. 



222). 



FIG. 227. FIG. 228. 



Nwr. A hard, one-celled, one-seeded, indehiscent 

 fruit, produced from a several-celled ovary, in which 

 the cells have been obliterated, and all but one of 

 the ovules have disappeared during growth. It is 

 often enclosed in an involucre, called a cupule (Fig. 

 227), or it has bracts at the base. 



SAMARA, or KEY-FRUIT (example, the elm). A 

 dry, indehiscent fruit, growing single or in pairs, with 

 a winged apex, or margin (Fig. 228). 



Dehiscent Fruits. 



Any dry, dehiscent fruit, whether simple or com- 

 pound, may properly be called a pod. 



FOLLICLE. A pod of a single carpel, with no ap- 

 parent dorsal suture, and dehiscing by the ventral 

 suture. You will seldom find an ovary consisting of 

 but one follicle ; but it is a common kind of carpel in 

 multiple pistils. Observe the ripe ovary of colum- 



