FLOWERING PLANTS. 39 



growth. The stem in the first of these classes 

 increases inwardly, that in the 

 second increases outwardly." 



" Our large trees must in- 

 crease outwardly," said Henry, 

 "for we saw the layers of 

 wood in the timber that was* 

 felled last year, and you! 

 taught us about the age of I 

 a tree being known by the 

 number of rings in the 

 trunk." 



" Exactly : but these grass- [ 

 es grow in the first place to- 

 wards the interior, while their I 

 stalks do not increase out- ' 

 wardly beyond a certain size ?x 

 so that they belong to the 

 first and smallest of these two 

 great divisions." 



Henry wondered how any 

 one could tell at first sight 

 whether a plant grew in- 

 wardly or outwardly, and his 

 father directed him to a sim- FOX-TAIL GE^S 



