172 THE BEHAVIOUR OF PLANTS 
the strawberry, then, is the receptacle. The strawberry 
is not, strictly speaking, a berry. A berry is a fleshy 
3 3 fruit with several seeds inside, as 
i | the snowberry, gooseberry, grape, 
tomato, etc. 
The blackberry. How is it with 
the blackberry fruit? You can read 
the story in the same way as you did 
in the strawberry, when you have 
a chance. The receptacle becomes 
larger and longer, and forms the in- 

side of the blackberry which we eat, 
iy though it 1s not a very juicy part. 
Fig.213, Fruit cluster of caltha. Where are the seeds? They are 
enclosed in a fleshy substance. This fleshy substance 
around each seed is the outside of the pistil. How 
different it is from the strawberry! / 
The raspberry. Compare the rasp- 
berry fruit with that of the strawberry 
and blackberry. Read the story and i 
see 1f you can tell what part of the <2 
flower makes the fruit. You should go of convolvulus. 
to a raspberry bed, or have some stems with ripe 
raspberries and, if possible, flowers on them. 
The raspberry and blackberry are not, strictly speaking, 
berries. They are collections of tiny stone fruits. In 
the flowers the pistils are separate, but as the fruit 
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