FORMS OF FRUITS. 



89 



ITS. The pi/^:id is the most curious and singular of all pods. 



It opens crosswise by a lid, like a sniifi'-box. Fig. 28-1 is tlie 



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



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



Henbane, formed of two carpels. So the pyxis 



\ of Poor-man's-wcather-glass (Anagallis, Fig. 



34:4:) is foi-med of several carpels. 



Fiff. 2S3. A follicle of Milkweed {Asclepias). 



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



Fig. 285. A pair of follicles, — the fruit of the Do-^bane {Apocymtm). 



Fig. 286. A legume, open, — fruit o'f the Pea-plant. 



Fig. 287. A jointed legume, or loraeut, — fruit of Desmodium. 



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



170. 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 oj^en 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^c, of one carpel, one cell, one row of seeds, and commonly 



178. Give tlie cliaracter of the pyxis. How docs tlie pyxis of Henbane 

 diflfor from that of Jeffersonia ? 



179. Can you describe and name the fniit of Cohimbine ? How is its leafy 

 character seen ? 



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



