86 
THE BOOK OP 
Name. 
Where F. und 
or Kaiscd. 
hinder or Kaiser and 
Date . 
Description. 
undu ato- 
Devon . . 
. Ed warns 
A stiff - growing undulate 
rigid um 
form, distinguished as the 
piogenitor of the beauli- 
lul fimbriate cri spurns 
raised first by Messrs. 
Stansfield. 
undulato-supra- . . 
— 
. 
.. Probably the finest supra- 
Jinentum Julies 
Jineate form. 
urguiceps.. 
— 
E. F. Fox (r.) . . 
A narrow, marginate form, 
(1370) 
with curved, claw - like 
crests. 
variegatum 
— 
. 
Thete are numerous types 
with green and yellow 
variegation, but this seems 
dependent on soil and 
situation, and cannot he 
depended upon as a con- 
stant character ; hence no 
list is given. 
Vcloisii 
France .. 
Introduced by 
Ai: erect - growing, round- 
Veitclr 
lulled, well-crested form ; 
interesting as the one 
impoited variety. 
Victoiicc .. 
Lowe (r.) 
A narrow ramo-ciistatum. 
TRICHOMANES RADICANS AND 
HYMENOPHYLLUM 
\ UNBF1DGENSE AND UNILATERAL. E (THE FILMY 
FERNS). 
THE necessary conditions of constant aerial humidity are so rare, 
even in our favoured island climate, that only three species of 
Filmy Ferns out of an immense number of existent ones are 
found in the British Isles, viz., Trichomanes radicans or the 
Bristle Fern (page 87), and Hymenophyllum tunbridgense and 
unilaterale, and these only on or in constantly damp and spray- 
bedewed rocks and caves in secluded mountain glens or ravines. 
Culture obviously is confined to Wardian cases, bell glasses, or 
sunken brick pits covered with a frame ; but given them and 
installation in proper soil, no Ferns are more capable of taking 
care of themselves, or of affording a maximum of satisfaction to 
the eye which can appreciate the natural feathery delicacy of 
Fern frondage, enhanced by the translucent verdancy and emerald 
sheen of this lovely branch of the Fern family. The soil must 
be a rough compost of sandy peat, liberally bestrewn and 
intermingled with lumps of porous stone. The creeping rhizome 
of T. radicans, or the mat-like masses of the other two, should 
be pegged down upon the surface, and a quantity of the same 
but finer compost sprinkled over them, almost burying them, 
this is then washed well down with a drenching of water until 
they reappear. Thus installed, cover closely with glass, give 
ample light, but no direct sunshine, and leave them well 
