496 CONSERVATIVE ORGANS. [LECT. IX. 



ened, but not sufficiently so as to render it 

 clubbed, is termed incrassatus. If a small point 

 project from the middle of the obtuse apex, the 

 leaf is said to be obtusum cum acumine, 24 (p. 

 493). The apex is termed retuse (retusus), 25, 

 when it is obtuse, with a broad shallow notch 

 in the middle: emarginate (emarginatus), 26, 

 when the notch is sharper, or nearly triangular : 

 truncated (truncatus), 27, when it appears as if 

 cut across in a straight line; as beautifully exem- 

 plified in the leaf of Liriodendrum tulipifera. It 

 is jagged (prcemorsus) , 28, when it appears as if 

 gnawed off, and the cross lines describe several ir- 

 regular points. Ex. Caryota urens (28) ; and tri- 

 dentate (trident atus) , 29, when it forms three 

 teeth. 



25" 



d. The differences in the bases of leaves depend 

 on the general superficial configuration ; I must, 

 therefore, refer you to what has been said on that 

 subject, and notice here one circumstance only, 



