THE LEAF-MARGIN 



187 



special forms of toothing are recognized, in accordance with the form 

 and direction of the teeth. When the latter point in an outward direc- 

 tion the margin is called Dentate (Fig. 534) ; when toward the apex of 

 the leaf , Serrat e (Fig. 533). When, instead of being pointed, the teeth 

 are rounded, the margin is Crenate (Fig. 530). 



Margins; Fig. 630. Crenate (Dalibarda). 531. Doubly serrate, the teeth appressed (^Vlmus). 532. 

 Obsoleteiy serrate (GauUheria) . 533. Serrate. 534. Dentate (Viburnum). 535. Serrulate {Vibur- 

 num). 530. Repand (Hamamelis). 537. Sinuate. 



Diminutives of these terms, indicating that the teeth are very small, 

 are Denticulat e. Serrulate (Fig. 535), and Crenulate . To any of these 

 terms the word "Minutely" may be prefixed as indicating that the 

 teeth are still smaller. Of each of these three principal forms there 

 are a number of sub-forms. 



When the teeth bear smaller or secondary teeth, the word " Douhly'L 

 is prefixed (Fig. 531, doubly serrate). 



When serrate teeth have their points very strongly directed toward 

 the apex or appearing as though pressed inward against the margin, 

 they are called Appressed (Fig. 531, partly). They may even be 

 Ingirved. When, upon the other hand, the ends of the teeth are turned 

 outward, they are called^alifint. When the points of the teeth are very 



