OK, PLAIN TEACHING. 



203 



or compound, 18. In simple 

 leaves, 14, the blade consists of 

 one piece, either quite entire, or 

 variously indented at the margin. 

 Compound leaves, 18, consist of 



several blades connected toge- 

 ther at one extremity by the 

 petiole, 19, the whole of which 



taken together constitute the 

 leaf. 



Leaves may be 

 arranged opposite 

 to each other in 

 pairs or sets ; and 

 when they form 

 a circle around 

 the stem they are 5G7, 

 called whorled, 20. 



The frond, 1, consists of a 

 union or incorporation of the 

 leaf, leaf-stalk, and x 

 stem, forming, as it 

 were, but one organ, 

 of which the parts 

 are not separated. 

 The leaves of palms 

 and ferns are frond- 

 like, and sea weeds 

 and lichens, for the 

 most part, consist 

 only. 



569. 



