TREE FORMS IN WINTER 237 



identify, apart from the pattern of its boughs. The bark of 

 the walnut is of much the same pale colour, but the furrows 

 are wider apart. The hard, dark and deeply furrowed bark 

 of the oak is well known ; it is one of the trees which shelter 

 the pupae of many insects in its deep grooves. 



ELMS 



Very different from the spare tracery of the outer boughs 

 of the ash are the dense heads of twigs formed by the beech 

 and elm. Though possessing this general similarity, both 

 are very individual trees, and easily distinguishable. The 

 height and rich rounded curves of the elm make a well- 

 grown specimen one of the finest of our trees. In bleak 



