114 SAGACITY AND MORALITY OF PLANTS. 



how, when a wood or a heath has been burned down, 

 and all the recent plants destroyed, an entirely new 

 set of plants immediately shoots up — their seeds 

 having been quietly waiting in the earth for some 

 such chance as this — a chance which was materially 

 affected by their power to retain vitality for an 

 indefinitely long period of time. 



