xviii BOTANY. 
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. 
Fie. XIV.—Types of leaf-forms. 
The Base and Apex.—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 lengthencd 
Fig. XV.—Diagrams of the principal forms of base and apex. 
out it is acuminate. When the apex ends in a bristle it is euspi- 
dete. 
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 
