INDEHISCENT FRUITS. 



143 



LESSON XXVIII. 



INDEHISCENT PKUITS: NUTS, DRUPES, BERRIES. 



342-349. Nuts. 350. Brazil-nut. 351. Drupes. 352-355. Berries. 

 356. Apocarpous Berries. 357. Anthoearpous Fruits. 358. Multiple 

 Fruits. 859. Artichoke, Strobilum. 



342. Nuts. — ^A Nut is a dry, indehiscent pericarp, usu- 

 ally l-celled and 1-seeded. Nuts are classed as follows : 



343. The Ahaine (85) and 

 the Caryopsis (82), already 

 described. The apocarpous 

 nutlets of the Rose, Straw- 

 berry, and Buttercup are 

 akaines. 



344. The Coccus (277) and 

 the Oremocarp (278), de- 

 scribed. 



345. The Cijpsela (Gr. 

 kupselis, cavity, box), an 

 akaine with an adherent 

 calyx-tube. It character- 

 izes the Gompositse (Fig. 

 142, b). 



346. The Glans or Gland 

 (L. glans, glandis, name of 



Fjo. 205. — Sycamore Maple {Acer Pseudo-Pla- 

 tavus) ; samara and separate cf fl. 



the acorn and chestnut), the fruit of 

 a ayncarpous ovary, 2- to 6-celled, 

 with 1 or 2 ovules in each cell, but 

 which becomes l-celled and 1-seeded 

 at maturity, and which has an ad- 

 herent calyx. The Acorn, Chestnut, 

 and Filbert are examples. 



347. The Regma, described (277). 

 348. The Samara, the winged fruit of a free syncarpous ovary, 



Fig. 206.— Trans. 

 {Pi-uuus Persica). 



a Peach 



