THE FRUIT. | pp 
a seed which springs from a single ovule of one cell of a 
compound ovary, which develops at the expense of all the 
other ovules. The chestnut-bur is a kind of involucre, 
and so is the acorn-cup. The name 
nut is often incorrectly applied in 
popular language; for example, the 
so-called Brazil-nut is really a large 
seed with a very hard testa. 
238. The Follicle. — One-celled, 
simple pistils, liké those of the marsh 
marigold, the columbine, and a good 
many other plants, often produce a 
Fic. 168. —Group of Foi- fruit which dehisces along a single 
Oe’ Suture, usually the ventral one. Such 
a fruit is called a follicle (Fig. 168). 
» 239. The Legume.— A legume is a one-celled pod, 
formed by the maturing of a simple pistil, which dehisces 
along both of its sutures, as already seen in the case of 
the bean pod, and illus- 
trated in Fig. 271. 
240. The Capsule. — 
The dehiscent fruit 
formed by the ripening 
of a compound pistil is 
called a capsule. Such 
afruit may be one- 
celled, as in the linear 
pod of the celandine Fig. 169. — Winged Fruits. 
(Fig. 271), or several- NEES i este 
celled, as in the fruit of the poppy, the morning-glory, 
and the jimson weed (Fig. 271). 
