14 THE GROWTH AND PARTS OF PLANTS 
stem of the pea does not grow longer, so the pea is left 
in position in the ground. ‘Lhe stem grows on from 
between the two 
thick cotyledons, 
arches up In a loop, \& 
pulls out the young 
and tender leaves 


Fic. 28, Acorns germinating. 
from the ground, and then straightens up. 
To compare the germination of the bean with 
that of the pea. ‘This can be done very easily by first 
soaking beans and peas for twenty-four hours in water. 
With the finger or with the knife split 
the bean along the line of the convex 
side and pull the halves apart. The 
Fig. 29. Marrow seeds YOUNG embryo plant lies attached to 
glass, turned in ait. One of these halves, having broken 
Seren posen® away from the other. ‘Split several 
beans in the same way and place the half which has 
the embryo bean plant under glass, | in Banas as shown 
in Fig. 26. . 
Take one of the peas and, by a sheht 
rubbing pressure between the fingers, 
remove the thin outer coat. The split 
between the halves is now seen. Care- 
fully break away one of these halves a but icon nage 
and split several more peas in the same way; those 
pieces which have the embryo attached should be planted 



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