CULTIVATION IN FERNERIES. 
21 
for moisture, shade, or exposure. Ferneries thus formed 
are objects of great beauty and interest, and are ever the 
most popular resorts in the grounds. 
But if a well-constructed fernery is beyond our reach, 
that is no reason why we should be destitute of ferns. 
These favourite plants may be grown in the most ex- 
posed situations, and in the most closed-in valleys, in 
the smoke of towns, and where the winds prevail; only 
in the latter case they must have the protection of the 
glass cover. Where the garden plot is too small to 
allow space for a fernery, they can be very successfully 
grown in pots, the same compost being used, or they 
will flourish in the flower-bed along with other plants. 
Most of our native ferns are suitable for the open 
fernery, and their individual peculiarities and require- 
ments are treated of in the systematic part of this work ; 
in suggesting, therefore, plants for the open fernery, it 
is only requisite at present to describe the foreign species 
of hardy ferns which are in request among our fern- 
growers. 
Polypodium hexagonopterum. Winged Polypody . This 
is a handsome fern, with fronds half a yard high, tri- 
angular, bipinnate, and sessile. The pinnules are ob- 
long and indented, and the whole plant thickly covered 
with hairs. The sori are round and marginal; the 
caudex creeping. It is a native of North America. 
Strut hiopteris Germanic a . German Ostrich- fern. Cau- 
dex widely creeping ; fronds pinnate ; leaflets pointed ; 
height of barren fronds 3 or 4 feet. Fertile fronds erect, 
arranged in a cluster in the centre. The barren fronds 
are of a vivid pale-green tint, shading to a lighter hue at 
the base ; the caudex spreads widely, throwing up fresh 
clusters of fronds at a distance of several feet. This 
