THE FRUIT AND SEED. 



109 



FIG. 223. 



FIG. 224. 



They are achenia. An ACHENIUM is a dry, inde- 

 hiscent, one-seeded fruit, with a separable pericarp, 

 tipped with the remains of the style (Figs. 222-224). 



UTRICLE. By this term is understood a kind of 

 achenium, with a thin, bladdery pericarp which is 

 sometimes dehiscent. 



FIG. 225. 



FIG. 226. 



CARYOPSIS. A dry, indehiscent, one-celled, one- 

 seeded fruit, with the pericarp adherent to the seed, 

 as seen in wheat, barley, oats, maize, etc. (Fig. 226). 



CREMOCARP. Pendant achenia. (See Ex. LII). 



CYPSELA. Still another variety of achenium, 



