THE LEAF. 



EXERCISE II. 

 Parte o/ a Grass-Leaf. 



GATHER a handful of grass and see if you can find 

 the parts shown in Fig. 2. 



FIG. 2. 



ra M n BMe ' 



Sheath. 

 Ligule. ... 



I 



Sheath. ~-l 



BLADE. The flattened upper part of the leaf. 

 SHEATH. A leaf-stalk surrounding the stem. 

 LIG'ULE. The. scale-like stipule often seen be- 

 tween the sheath and the blade. 



when compared with Fig. 1, the specimens will be found lacking 

 in some of the parts there seen. This will make it necessary to 

 repeat the exercise. At the second trial the leaves will be pulled 

 with more care, and the pupil will seek for those having all the 

 parts seen in the picture. Let him point out the parts in each 

 of his specimens, and give them their names, repeating the pro- 

 cess till he can do it without hesitation or mistake. 



