86 



OBJECT LESSONS IN BOTANY. 



the pericarp is ripe, it may open in some special manner of 

 itself and discharge the seeds ; or it may have no prevision 

 for opening, and remain closed until it grows or decays 



Fig. 270. Aclienia of Eue Anemone, in a head. 



Fig. 271. Fruit of Caraway, consisting of two aclienia. 



Fig. 272. Kernel of Wheat, — a sort of achenium called cariopsis. 



Fig. 273. Fruit of Thistle,— another sort of achenium, crowned with a par"- us 

 which serves as wings. 



Fig. 274. Fruit of Elm, — a samara, or winged achenium. 



lig. 275. Fruit of Beech, — two nuts, inclosed in the burr. 



Fig. 276. The Peach (a drupe),— cut open, showing the seed inclosed in its stone, 

 and the stone in the thick pulp. 



Fig. 277. Fruit of Pigweed,— a one-seeded pericarp called utricle. 



Fig. 278. Fruit of India Strawberry,— a fleshy torus bearing the achenia outside. 



Fruits that open we will call dehiscent fruits, and those 

 which do not open, indehiscent. A\^e will first study some of 

 the forms of indehiscent fruits, arranged as follows : 



167. First Division : Fruits indehiscent, one-seeded, dry ; 

 namely, Achenium, Samara, Glans. 



166. Of wliat two parts does the friiit consist ? What is a dehiscent fruit T 

 indehiscent ? 



