108 BRITISH FERNS. 
oval, with a lengthened sharp tip, which is generally 
twisted, and which terminates in a hair-like point; 
pale brown, transparent and entirely of one colour: 
more ‘triangular; they are set on the main stalk 
rather obliquely, so that their upper surface ap- 
_ proaches a horizontal position, although the frond is 
nearly erect. The pinnules are of moderate size, 
Sessile and deeply notched, the divisions toothed, 
and each tooth terminates in a little spine: the first 
inferior pinnule is longer than the first superior one. 
and separate, except at the apex of the frond; at first 
green, then white, subsequently black and finally bright 
