4 2 



BOTANY FOR BEGINNERS 



CHAP. 



Imparipinnate, when there is an odd leaflet, as in the Rose 

 and Robinia (Fig. 58). 



Bipinnate, when the leaflet is again divided, as in the common 

 Meadow Rue and Acacia (Fig. 59). 



Tripinnate, when the division is carried a little farther and 

 each part is in three, as in the Lesser Meadow Rue. 



The Margin of Leaves. The margin of leaves vary in 

 different plants. The following terms are used to describe 

 them : 



Entire, if the margin is undivided, as in the Wallflower 

 (Fig. 60). 



FIG. 58. Imparipinnate 

 leaf of Robinia. 



FIG. 59. Bipinnate leaf of Acacia. 



Serrate, if the margin is divided up into teeth-like divisions, 

 like a saw, and they point towards the apex, the above term is 

 used, ^>.,Deadnettle. 



Biserrate, if the teeth are again divided, as in the Elm. 



Crenate, if the teeth are rounded, as in the Ground Ivy. 



Dentate, if the teeth point outwards, as in the Guelder Rose. 



