INTRODUCTION 



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When a leaf stands independently on a single 

 stalk it is called simple. Among the various 

 forms of simple leaves we may mention the 

 following : — 



i. Needle-shaped, when they are long and 

 equally thick and broad (fig. 2). 



5. Elliptical, when they are twice as long as 

 broad (fig. 6). 



6. Orbicular, when they are about as long as 

 broad (fig. 7). 



7. Rhomboidal, when four-sided (fig. 8). 



8. Triangular (fig. 9). 



2. Linear, when they are several times as long 

 as broad, with parallel sides (fig. 3). 



3. Lanceolate, when they are three or four times 

 as long as broad, and pointed at the end (fig. 4). 



4. Elongate, like the last, but with obtuse ends 

 (%• 5)- 



9. Ovate, when the upper end is narrower than 

 the lower, and the leaf is not more than twice as 

 long as broad (fig. 10). 



10. Obovate, when the lower part is narrower 

 than the upper (fig. n). 



n. Conical, when the upper portion is broader 



