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a s p l e n ium . 65
near its extremity a circular sorus. There is no true indusium
but the sori are covered by the reflexed and partially
bleached margins which almost meet behind, and by which
they are quite concealed. These patches are at first distinct
but ultimately meet laterally.
The Rock Brakes is a mountain Bern, choosing to grow in
S ony situations. It is comparatively rare and local; most
abundant in the north of England and Wales, and less
plentiful in Scotland and Ireland. It grows readily in pots,
and also in a Wardian case, for either of which modes of
cultivation Its small size and elegant aspect render it a very
desirable object.
This Eern has been called by several other names, of
which the principal ak-Cryplogramma crispa, Pteris
crispa, and Osmnncla crispa. The two latter are now ouite
obsolete.
Genus VIII. ASPLENIUM, Linnoeus.
T h e British Aspleniums are small evergreen Eerns, with
long narrow single sori lying in the direction of the veins
which traverse them; and by these marks they may be