PERICAEPS 



151 



lidU. lierries of the siiowberry. 



a follicle (Fig. 244). If these pistils were united, a single 

 compound pistil would be formed. Columbine, peony, nine- 

 bark also have folli- 

 cles; milkweed, also 

 (Fig. 245). 



290. A 1-loculed 

 pericarp which de- 

 hisces on both edges 

 is a legume. Peas 

 and beans are typi- 

 cal examples (Figs. 

 246, 247): in fact, 

 this character gives 

 name to the pea-fam- 

 ily, — Leguminosfe. 

 Often the valves of the legume twist forcibly and expel 

 the seeds, throwing them some distance. The word pod 

 is sometimes restricted to legumes, but it is better to use 

 it generically (as in 287) for all dehiscent pericarps. 



291. A compound pod— dehiscing pericarp of two or 

 more carpels — is a capsule (Figs. 248, 249). There are 



some capsules of one locule, but 

 they may have been compound 

 when young (in the ovary stage) 

 and the partitions may have 

 vanished. Sometimes one or 

 more of the carpels are uniformly 

 crowded out by the exclusive 

 growth of other carpels (Fig. 

 251) . The seeds or parts which 

 are crowded out are said to be 

 aborted. 



292. There are several ways in which capsules dehisce or 

 open. When they break along the partitions (or septa), 

 the mode is known as septicidal dehiscence ; Fig. 252 



Eggplant fruits. Kxamples of 

 large berries. 



