70 LEAVES. GENERALLY. 



Glandular, fringed with glands. 



Plicate, plaited, fig. 5. 



Curled, fig. 6. 

 Leaves are said to be veined, when the vessels by 



which they are nourished, are branched and sub- 

 divided, fig. 7. 



Ribbed, or nerved, when the vessels or petiole 

 extend in simple lines from the base to the 

 point, fig. 8. 



With respect to their texture, leaves are said to be 



Fleshy, when of a thick pulpy substance. 

 Gibbous, swelling on one side or both, from ex- 

 cessive pulp. 

 Channelled, or furrowed. 

 Keeled, bent in the form of a boat. 

 Membranous. 

 Two-edged. 

 Sword-shaped. 



They are, in their arrangement, either 



Opposite, fig. 9. 



Alternate, fig. 10. 



Scattered. 



Crowded. 



Verticillate, whorled ; or Stellate, starred, fig. 



11. «* 

 Imbricated, fig. 12. 

 Tufted, or bundled, fig. 13. 



