XVUl 



SOTAIfr. 



it is the needle-shaped leaf; when small and thread-like it is capil- 

 lary. 



5. Oblique : any of the foregoing forms in which one side has 

 become broader than the other; thus, obliquely ovate, obliquely 

 heart-shaped, etc. 



Fig. XIV.— Types of leaf-forms. 



The Base and Apexi — In most leaves two extremities may be dis- 

 tinguished and described. There are three general forms, viz., 

 the acute, obtuse, and notched. (Fig. XV.) 



The extremity is acute when the approaching sides form an acute 

 angle with each other. When the acute extremity is lengthened 



Fia. XV.— Diagrams of the priDcipal forms of base and apex. 



out it is acuminate. When the apex ends in a bristle it is cuspi- 

 dr,te. 



The extremity is obtuse when blunt or rounded. When so blunt 

 as- to seem as if cut off it is truncate, as in what is known as the 



