146 
THE FERN FAMILIES OP BRITAIN. 
received its name throngli being found at one time at Tun- 
bridge, in Kent, to wbich place, however, it is by no means 
confined, though unscrupulous Fern-hunters have rendered it 
tolerably scarce in many of its former haunts. It is precisely 
one of those Ferns that a true lover of Nature should gloat 
over in situ and leave alone, unless he is sure he can grow 
it. Mr. Shirley Hibberd mentions that he once saw a square 
Fig. 32. — The Tunbridge Filmy Fern {Hymenophyllum tunbridgense). 
yard of this beautiful plant, dried and rolled up, figuring in 
a lady’s collection of souvenirs of her travels. This item 
should have figured in our chapter on Fern Foes, but it fits 
here equally well. The spore-capsules of this Fern are borne 
in comparatively large, urn-shaped receptacles, on the edges 
of the tiny fronds. No varieties have been found as yet. 
The One-sided Filmy Fern 
{Hymenophyllum unilaterale). 
The difference between this Fern and the last is indicated 
clearly enough by Fig. 33, which also shows the very 
