MORPHOLOGY OP LEAVES AND FLOWERS 



595 



Wavy margin, when the margin forms a wavy line bending 

 slightly inward and outward in succession, as in the bitter dock 

 (Rumex ootusifolius). 



Fig. 449 1 Fig. 449 II Fig. 449 III Fig. 449 IV Fig. 449 V 



Fig. 449. I. Leaf of Daisy, spatulate in shape with a serrate margin. II. 

 Spiny-pointed, serrulate leaflet of alfalfa. III. Wavy-margined leaf of 

 Pigweed (Amaranthus) . IV. Ovate, dentate leaf of Snowball. V. Serrate 

 leaf of Hen-bit. 



(After Thome\) 



Toothed or dentate, when the margin is cut into sharp teeth and 

 the teeth point out, as in the lower leaves of the daisy fleabane 



(Erigeron annuus). 



Fig. 450. Cleft and pinnatifld leaves of Wild Lettuce. 

 (After Thome.) 



