FORMS OF FRUITS. 



89 



178. The j)yxis is the most curious and singula^* of all pods. 



It opens Crosswise by a lid, like a snuff-box. Fig. 284 is the 



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



It is formed of one carpel only. Fig. 282 is the pyxis of 



Henbane, formed of two carpels. So the pyxis 



of Poor-man's-weatv r-glass (Anagallis, Fig. 



344) is formed of several carpels. 



.286- 



■M<j. 283. A follicle of Milkweed (AscUpias). 



Fig. 284. A pyxis, — fruit of Jefferaonia, the Eheumatism-root. 



Fig. 285. A pair of follicles, — the fruit of the Dojfbane {Apoeynum). 



Fig. 286. A legujne, open, — fruit of the Fea-plaut. 



Fig. 28>. A jointed legume, or loment, — fruit of Desmodium. 



Fig. 288. A siliole, — 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 two 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 character of t^e pyxis. How does the pyxis of Henh£me 

 differ-from tkat of Jefferaonia ? 



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

 character seen ? 



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



