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THE FERN WORLD 
plant. Specimens have been found in Derbyshire ; upon an 
old wall at Low Leyton in Essex, though it has now dis- 
appeared from that particular habitat ; at Saddleback, in the 
lake district of Cumberland, and in Yorkshire. It is stated 
to have been found in Wales on Snowdon, and at Cwm 
Idwell ; and in Scotland on Den Lawers. 
Culture. — The same kind of soil and a similar position in 
regard to shade and shelter will suit all three of our Bladder 
Ferns. Good drainage, plenty of moisture, and complete 
shade are the necessary requirements, with a soil consisting 
of equal parts of loam, peat, and leaf mould, with sand 
enough to make one fourth of the entire quantity of soil. 
There should also be some small pieces either of broken 
limestone or sandstone mixed in with the compost. It can 
equally well be cultivated on the open rockery — in its higher 
parts — in pots, in a case, or in the Fern house. Its love of 
moisture makes it thoroughly at home amidst an atmosphere 
of constant moisture. In planting it, wherever it may be 
placed, it is desirable to fix the crown between little blocks 
of stone, covering the rootlets, but leaving the crown well 
above the surface. 
