336 



FIELD AND WOODLAND PLANTS 



surrounded by an outer covering or epidermis that does not allow 

 the water within to pass out so readily as in the case of the deciduous 

 leaves. 



In addition to the observations previously mentioned, we should 



The ash in Autumn, with its ' keys. 



do well, at this season of the year, to study the autumn fruits 

 of our trees and shrubs, most of which still remain attached to the 

 twigs. 



Some of these fruits lose most of their moisture as they ripen, 

 thus becoming very light, and are provided with wings that cause 

 them to be dispersed more or less by the wind. 



The so-called ' keys ' of the Ash are one-seeded fruits, extended 



