26 



GENEKAL PEESTCIPLES. 



Round^ Toundisli^ as tliey approacli a circular form like 

 fig. 21. The j)oint is often a distinguisliing featm-e, 

 some terminating suddenly in a sharp point, others 

 drawn out to a long, shai-p point, jpeaked^ whilst 

 others are nearly round. They differ much, too, in 

 the form of the base, some are rounded, some sharp, 

 and some heart-shaped. 



J'/^s. 22 to 2«, forma of leaves. 22, oval. 23, oblong. 24, lanceolate. 25, ovate. 26, 

 obovate. 



The divisions of the edges are serrated or tootlied^ when 

 the edges are cut into sharp teeth, directed towards the 

 point of the leaf; finely (fig. 27) or coarsely (fig. 28) ser- 

 rate^ as these teeth are fine or coarse; doiMy serrate^ 

 when the principal division or tooth is subdivided. 

 Crenate (fig. 29), when the divisions are rounded, instead 

 of being sharp like teeth. 



