Forest-Trees. 



93 



POLTALTHEA. STRANGE FOREST-TREE. TREE-FERN. 



trunk is itself a forest of stems and aerial roots. Still more 

 rai'ely are found trees which appear to have begun growing in 

 mid-air, and from the same point send out wide-spreading 

 branches above and a complicated pyramid of roots descend- 

 ing for seventy or eighty feet to the ground below, and so 

 spreading on every side that one can stand in the very centre 



