132 



FOUNDATIONS OF BOTANY 



FIG. 90. Shapes of Bases of Leaves. 



1, heart-shaped (unsymmetrically) ; 2, arrow- 

 shaped ; 3, halberd-shaped. 



FIG. 91. Peltate Leaf of 

 Tropaeolum. 



FIG. 92. 



A; runcinate leaf of dandelion ; B, 

 lyrate leaf. 



FIG. 93. Shapes of Margins 



of Leaves. 



a (1), finely serrate ; (2), coarsely 

 serrate ; (3), doubly serrate. 

 6 (1), finely dentate ; (2) , sinuate 

 dentate ; (3), doubly dentate. 

 c, deeply sinuate, d, wavy. 

 e (1), crenate or scalloped ; (2), 

 doubly crenate. 



