THE LEAF. 



Fig. 47 



Fig. 49. 



Lobcd, Fig. 47, (lobatum,) divi- 

 ded into segments, the margins of 

 which are rounded. Ex. Liver 

 leaf, (Hepatica triloba,) Sassafras, 

 (Laurus sassafras.) 



Dentate, Fig. 48, (toothed,) beset 

 with projecting, horizontal, distant 

 teeth, of the same substance as the 

 leaf. Ex. Blue Bottle, (Centaurea 

 cyanus,) (Atriplex lancinata.) 



Serrate, Fig. 49, (saw-like,) the border being 

 cut into notches ending in sharp points, which 

 incline towards the apex of the leaf. Exam- 

 ples of this are very abundant, as Nettle, (Ur- 

 tica,) Rose, (Rosa,) Peach, (Amygdalus.) 



Erose, Fig. 50, (jagged,) having an appearance 

 as though it had been gnawed or bitten by insects. 

 Ex. Fire weed, (Senecio hieracifolius.) 



With respect to their summits, the following distinctions 

 are the most common. 



Fig. 51. 



Acuminate, Fig. 51, (pointed, with an extended 

 termination, and in this respect, differing from the 

 lanceolate leaf. Ex. several species of the grass 

 Panicum, and of the Reed, (Arundo.) 



What is the form of a lobed leaf? Of a dentate leaf? Of a serate 

 leaf? Of an erose leaf? Of an accumulate leaf? 



