i;.( )(.»TS 



31 



Fig. 20. Aerial roots of an orchid (CatUeya) 



(Fig. 46) climb. Air roots are also borne by many kinds of air 

 plants which do not root in the earth at all. Such plants are 

 usually natives of moist, warm climates. Good examples of 

 ah plants are many orchids (Fig. 20), and some plants of the 



