18 



OBJECT LESSONS IN BOTANY. 



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

 lanceolate; that is, the inverted lance-shaped, like the .eai 

 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. Obovato leaf of the Smoke-tree (Rhus Cotinus). 

 Fig. 19. Oblauceolate leaf of Muhlenburg's Willow. 

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

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



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

 veined leaves into three classes. 



such leaves. Oblanceolate ? Show us examples. Spatulate ? Show us ex- 

 amples. \V~edge-shaped, 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 oex. 



