134 HYMENOPHYLLUM TUNBEIDGENSE. 
face of rocks and stone open to the action of all kinds 
of weather, still, when we attempt to cultivate it, we 
cannot succeed, unless means are taken to confine a 
close, moist atmosphere about its little delicate fronds. 
It prefers being kept continually damp and warm, which 
renders it a most valuable acquisition to the Wardian 
case, where it may be grown separately, as also under a 
plain bell-glass, or may be mixed with others, which 
likewise prefer a similar situation ; but whichever may 
be chosen for its cultivation, rather more care will be 
necessary in arranging it than will be required for most 
other Ferns. The situation it generally chooses for its 
habitat will be found to be nearly or quite free from all 
vegetable moulds, and which may be quite dispensed 
with in pot or artificial culture. Although we have 
seen it grown very well in equal parts peat and silver- 
sand, yet we have always found it thrive best under the 
following treatment. 
If to be grown as a pot plant, procure as many 
shallow pots or deep pans as may be required (from 
eight to twelve inches wide will be as convenient a size 
as any, and will grow a nice mass), fill the pot or pan to 
within an inch-and-a-half to two inches of the rim with 
small crocks, upon this place half-an-inch of white moss 
(sphagnum), which press down tight ; the pot is then to 
be filled quite full with powdered sandstone, which is 
also to be pressed down very firm ; upon this a little 
silver sand is to be sprinkled, then, turn the Fern root 
upwards, damp the roots, and sprinkle a little sand upon 
or between them ; after that turn the whole over upon 
