THE FILMY FERNS. 
445 
cover the moist rocky surfaces of the habitats of 
the two British species of Eymenojohyllums. 
When the natural conditions under which the 
Filmy Ferns grow can be imitated in the Fern 
garden, then these beautiful little pellucid-leaved 
plants will thrive luxuriantly. The natural con¬ 
ditions can be imitated perfectly under a cover¬ 
ing of glass, which will secure the object of keep¬ 
ing an atmosphere of perpetual moisture around 
the rhizomas and fronds. The soil should be peat 
and silver sand, and on this compost should be 
arranged little blocks of stone, between which the 
roots should be placed. The whole should be 
saturated with water, and then covered with the 
glass shade. Here the Filmy Ferns will grow 
luxuriantly, and will thus, in the warm humidity 
of their adopted home, exhibit the freshness which 
they can only otherwise exhibit in their rocky 
habitats in the misty atmosphere and within sound 
of the thunders of the moorland streams. 
