FORMS OF FRUITS. 



89 



178. Thepi/xts is the most curious and singular of all pods. 



It opens crosswise by a lid, like a snuff-box. Fig. '2S4: is the 



likeness of the pyxis of Kheumatism-root, common in Ohio. 



It is formed of 07ie carpel only. Fig. 282 is the pyxis of 



Henbane, formed of two carpels. So the pyxis 



of Poor-man's-weather-glass (Anagallis, F 

 3tl:-i) is formed of several carpels. 



Iff. 



288. A follicle of Milkweed (Asdepias). 

 Fig. 284. A pyxis, — fruit of Jeifersonia, the Kheumatism-root. 

 Fig. 285. A pair of follicles, — the fruit of the Doo^bane {Apocynum). 

 Fig. 286. A legume, open, — fruit of the Pea-plant. 

 Fig. 287. A jointed leirume, or loment, — fruit of Desmodium. 

 Fig. 288. A silicle,— fruit of Shepherd's-purse. 



179. Follicle is the name of such pods as those of Colum- 

 bine (Fig. 208), Milkweed (Fig. 283), and of Dogbane (Fig. 

 285). They are formed of a single carpel, and open length- 

 wise, on one side only. It is easy to see the resemblance 

 between the follicle and a leaf, the leaf being folded so as to 

 bring its tw^o margins together. (See Fig. 207.) 



180. Legume is the proper name of the Pea pod, Bean pod, 

 &c., of one carpel, one cell, one row of seeds, and commonly 



178. Give the cliaracter of tlie pyxis. How does the pyxis of Henbano 

 differ from that of Jeffersonia ? 



179. Can you describe and name the fruit of Columbine ? How is its leafy 

 character seen ? 



180. Describe and name the Pea pod Wliat is a loment ? 



