224 FOUNDATIONS OF BOTANY 
241. Dry Fruits and Fleshy Fruits. —In all the cases 
discussed or described in Sects. 238—240, the wall of the 
ovary (and the adherent calyx when present) ripen into 
tissues which are somewhat hard and dry. Often, how- 
ever, these parts become developed into a juicy or fleshy 
mass by which the seed is surrounded ; hence a general 
division of fruits into dry fruits and fleshy fruits. 
242. The Stone-Fruit. — In the peach, apricot, plum, and 
cherry, the Sabin or wall of the ovary, during the proc- 
ee ess of ripening, becomes con- 
verted into two kinds of tissue, 
the outer portion pulpy and 
edible, the inner portion of 
almost stony hardness. In 
common language the hard- 
ened inner layer of the peri- 
carp, enclosing the seed, is 
called the stone (Fig. 170), 
Fic. 170.—Peach. Longitudinal hence the name stone-fruits. 
mae oe Spane 243, The Pome. —The fruit — 
of the apple, pear, and quince is called a pome. It con- 
sists of a several-celled ovary, — the seeds and the tough 
membrane surrounding them in the core, — enclosed by a 
fleshy, edible portion which makes up the main bulk of 
the fruit and is formed from the much-thickened calyx, 
with sometimes an enlarged receptacle. In the apple and 
the pear much of the fruit is receptacle. 
244. The Pepo or Gourd-Fruit. — In the squash, pump- 
kin, and cucumber, the ripened ovary, together with the 
thickened adherent calyx, makes up a peculiar fruit (with 
a firm outer rind) known as the pepo. The relative bulk 
