52 SIMPLE AND AGGREGATE FRUITS. 
78. The fruit of the Pea, Bean, or Lupin is a single 
ovary and is called a legume; while the fruit of the 
Apricot, Plum, or Cherry, which is also but one ripened 
ovary, and called a drupe (pl. 17. f. 18.), differs chiefly 
from the legume in the circumstance of not opening 
(dehiscing) at maturity, and of having the shell thick- 
ened partly into a pulp (p.), which occupies the outside, 
and a hard substance (s.) or stone, which lines the inside: 
these fruits resulting from a single ovary in each flower, 
are termed simple. 
AGGREGATE FRUITS. 
79. But when the ovaries are simple, (uncombined), 
and yet numerous in one flower, as in the Buttercup 
(pl. 17. f. 4.), the term aggregate fruit is applied. 
Thus in the Buttercup, a number of carpels are placed 
upon a dry receptacle (pl. 17. f. 4. r.); while in the 
Strawberry (f. 5. and 6.), the carpels are the small 
seed-like bodies (¢.) placed upon the soft spongy mass 
(r.), which is eatable, and answers to the receptacle in 
a fleshy or enlarged state: while in the Blackberry, 
and Raspberry (f. 7. 8.), the carpels form a soft mass, 
which can be pulled off from a white core on which 
they are placed, and which is also a receptacle (7.) in 
a dry state. That the small bodies on the Strawberry, 
and the soft spongy ones in the Raspberry, are ripe 
ovaries, may be ascertained by examining them closely, 
or by means of a glass, when each will be found to 
possess a style, and to contain a minute seed: f. 7. 
shows a number of ovaries with styles, and f. 8. the 
same, seated on a white centre (.), the receptacle. 
