Ch. Ill, 8] FORMS OF FOLIAGE LEAVES 



59 



I'i'.. 29. — Primeval tropical forest, in Ceylon. To illustrate the large 

 size of leaves in the undergrowth. (Reduced from Kerner.) 



principle holds good in our temperate flora, as the student 

 may recall. At the other extreme, very small leaves occur upon 

 plants which are exposed to the greatest dryness, brightness, 



