LEAF-FORMS AND FIGURES. 21 
ear). In some leaves these lobes are very broad and round- 
ed, giving to them a kidney-shaped form, that is, reniform, 
as vou see in this Wild Ginger leaf (Fig. 23), and in the 
Pennywort (Fig. 24). The peltite, or shield-shaped leaf (Fig. 
25—another Pennywort) has its base lobes united, and its pet- 
iole fixed to the under side. See, also, Nasturtion leaves. 
21. We will next study a class of forms with deeply lobed 
or cleft blades, not well filled up between the veinlets. 
32 83 84 
Fig. 31. Bi-pinnatifid leaf of Pig-weed. 
Fig. 82. Sinuate-lobed leaf of White Oak. 
Fig. 33. Undulate-lobed leaf of Jack Oak. 
Fig. 84. Lyrate leaf of Moss-eup Oak. 
Fig. 35. Lobed leaf of Mulgedium (Blue Milkweed). 
First, look at this Liverwort leaf (Fig. 30). It is cleft 
two places, rendering it threelobed. The Sweet-gum leat 
(Fig. 4 a) is five-lobed Oak, leaves are lobed in many pat- 
terns, according to the kind. The White Oak has a sinuate- 
21. What is the figure of the Liverwort leaf? What the figure of the 
Maple leaf? What kind of venation have these last two? Define the fig- 
ure of the White Oak leaf. Of the Mossy-cup Oak. ‘ 
