THE LEAF. 
23 
of each kind of leaf you have found. Place the com¬ 
plete leaves by themselves. Put the sessile leaves 
together. 
The parts of grass-leaves are shown in Fig. 3. 
You see the blade, the flattened upper part of the 
leaf; and the sheath, a leaf-stalk surrounding the 
stem; then on each leaf there is a lig'ule— it is the 
scale-like stipule on the inside of the leaf between 
the sheath and the blade. 
There are many kinds of plants with leaves made 
up of parts similar to these of the grass-leaf. Com= 
pare grass-leaves with Fig. 3. 
