112 



J^HSSOjyS WITS PLANTS 



Fig. 74.) The leaf has no petiole, then, but it 

 has two distinct parts. The upper part may be 

 called the blade, as in other leaves, and the part 



Fig. 108. 



Clasping or ampler! 

 caul leaf. 



Fig. 109. 

 Perfoliate leaf. 



sheath. It is a 

 nate leaf-; and the 

 Oorea of rhubarb, termiue if this is 

 general feature of 



Fig. ho. 



from 1 to 6 is the 

 sheathing or vagi- 

 pupil should de- 

 a common or a 

 grass-like plants. 



123. A rhubarb (pie-plant) stem is at Fig. 110. 

 The petiole is at a, and the stem is completely- 

 encircled with a sheath. This sheath of the rhu- 

 barb and its allies, as smartweed, buckwheat, 



