80 



ELEMENTS OF STRUCTUKAX BOTANY. 



on the inner surface with bristles pointing towards lihe 

 base of the leaf. 



118. Finally, as leaves present an almost infinite 

 variety in their forms, it will often be necessary, in de- 

 scribing them, to combine the terms explained above. 

 For instance, a leaf may not be exactly linear, nor ex- 

 actly lance-shaped, but may approximate to both forms. 

 In such a case the leaf is described as lance-linear, and 

 so with other forms. 



The following form of schedule may be used with 

 advantage in writing out descriptions of leaves. Two 

 leaves — one of Maple and one of Sweet-Brier — are 

 described by way of illustration. If a leaf is compound, 

 the particulars as to outline, margin, apex, base, and 

 surface will have reference to the leaflets. 



liEAF SCHEDULE. 



