18. 



OBJECT LESSONS IN BOTANY. 



the egg inverted. A similar form, but narrower, is the ob- 

 lanceolate; that is, the inverted lance-shaped, like the leaf 

 of Papaw, or Fig. 19. Next, still narrower, is the spatulate, 

 a figure compared to the surgeon's spatula (Fig. 21); and 

 lastly, the wedge-shaped, or cimeate, tapering from a broad 

 apex to a slender base, as in Fig. 20. 



Fig. 18. Obovate leaf of the Smoke-tree (Rhus cotula). 

 Fig. 19. Oblanceolate leaf of Muhlenburg's Willow." 

 Fig. 20. Cuneato leaf of a Sundew (Drosera longifoUa). 

 Fig. 21. Spatulate leaf of a Sundew (variety of Z>. longifolia). 



18. Thus we have arranged these twelve forms of feather- 

 veined leaves into three classes. 



such leaves. OblanSeolate ? Show us examples. Spatulate 1 Show us ex- 

 amples. Wedge-shaped, or cuneate ? Give examples. 



18. Repeat the names of the four leaf-forms broadest at hase ; — the four 

 broadest in the middle ; — the four broadest towards apex. 



