DEHISCENT FRUITS. 



141 



(Fig. 201), which have 

 central placentation, and 

 the Arnotto (Pig. 199) 

 and the Violet (Pig. 204, 

 E), -which have parietal 

 placentation. 



332. A Pyxis or Pyxid- 

 ium (Gr. ■pyxis, pyxido, 

 box) IS a capsule which 

 opens by circumscissile 

 dehiscence , the upper 

 part lifting like a lid (L. 

 operculum), as in the 

 Henbane (Pig. 197, D), 

 the Monkey - pot (Pig. 

 156), and the Plantain. 



333. A Silique is a 

 long, slender capsule, 2- 

 valved, with parietal pla- 

 centse, and openin^from 

 bottom to top. It is 1- 

 celled in the Celandine ; in 

 Cruciferae it is 2-celled by 

 a false septum (Fig. 200, 

 A), called a Replum (L. 



Fio. 202.— A, boll of ^ar- 

 oiiiim TazneUa. B, diagram of 

 same. 



p a 



Fia. 201. — a, boll of Brazil-nut (Dertholletin exceha), 

 ■with large pore at top ; b^ same, sawed in half, show- 

 ing sds. and central columnar placenta : c, a seed the 

 so-called nut; d, same, cut transversely, showing the 

 thick tegmen and testa and the creamy embryo or 

 kernel; e, embryo removed; /, placenta removed: g, 

 leaf. 



door-case) ; in both cases the seed-bearing 

 placentse persist. 



334. A Silicle is a short, broad silique. 

 Its valves are parallel to the broad replum, 

 as in the Satin-Plower and the Brophila 



Fig. 203. — A, boll of Castor-Oil Plant {Ricinus communis) ; 3 cocci, with a columella, 

 or gynobase. B, diagram of same. C, boll of Foxglove {Digitaiis purpurea); 

 2-celicd. 



(Fig. 200, B), or keeled a^d pouch-like, with a narrow replum, as in 



