nuns 127 



warmth of spring enables tliem to expand, their 

 under surfaces have such a thick coat of down 

 that tlie plane is known in some countries as the 

 cotton-tree. kroin its fruit bein;/ in the form of 



AK IN WINTKK. 



hanginfj circular balls, its name in America is the 

 button-wood. The need of this s|)ccial protection 

 ai^ainst cold is shown b\' the fact that if severe 

 frost returns after the leaves have expanded, they 



