18 



OBJECT LESSONS IN BOTANY. 



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

 Icmceolate ^ that is, tlie inverted lance-sliaped, 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 cuneate^ tapering from a broad 

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



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

 Fig. 19. Oblanceolate loaf of MuhJetiburg's Willow. 

 Fig. 20. Cuneate leaf of a Sundew (Drosera longifolia). 

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



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

 veined leaves into three classes. 



Bucli leaves. Oblanceolate ? Sliow us examples. Spatulate ? Sliow us ex- 

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



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

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



