132 



FOUNDATIONS OF BOTANY 



Fia. 90. — Shapes of Bases of Leaves. 



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

 shaped; 3, halberd-shaped. 



Fig. 91.— Peltate Leaf of 

 Tropffiolum. 



Fig. 92. 



A, runclnate leaf of dandeUon ; B, 

 lyrate leaf. 



Fig. 93.— Shapes of Margins 

 of Leaves. 

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

 serrate; (3), doubly serrate. 

 &(l),finely dentate; (2), sinuate 

 dentate; (3), doubly dentate.' 

 c, deeply sinuate, d, wavy. 

 « (1), crenate or scalloped ; (3), 

 doubly crenate. 



