PAGK
Genus X I.—Pteris : ...................................................................................................229
The Common Brakes {Pteris a q u i l in a ) .............................................................. 231
Genus X II.—Adiantum : .............................................................................................. 244
The Common Maidenhair (A . . . . 246
Genus X III.—Cystopteris ; .............................................................................................. 252
The Brittle Bladder Fern {Oystopteris f r a g i l i s ) ..........................................254
Tlie Alpine Bladder Fern {Cystopteris r e g i a ) ................................................269
The Mountain Bladder Fern {Cystopteris m o n ta n a ). . . . . . 273
Genus XIV.—Woodsia : .......................................... 277
The Oblong Woodsia {Woodsia ilvensis) . . . . . . . 279
The Alpine Woodsia {Woodsia a l p i n a ) ................................................................283
Genus XV.—Trichomanes : .........................................................................................287
The European Bristle Fern {Trichomanes r a d ic a n s ) ......................................290
Genus X VI.—H ymenophyllum : .........................................................................300
The Tunbridge Film Fern {Hymenophyllum tunhridgense) . . . . 302
{Hymenophyllum u n ila te r a le )...............................................308
Genus X VII.—Osmunda : ...............................................................................................313
The Royal Fern {Osrmmda r e g a l i s ) ....................................................................315
Genus X V III.—B o try c h ium : .................................................................................... 322
‘The Common Moonwort {Botrychium L w i a r i a ) ............................................... 824
Genus XIX.—Ophioglossum : ............................................................................... .......
The Common Adder’s Tongue {Ophioglossum v u lg a tw n ). . . . 336
The Dwarf Adder’s Tongue {Ophioglosmm lusitanimm) . . . . 342
A d d e n d a ................................................................................... 34^
LIST OF PLATES.
PLATE
LIT.— A t h y r iu m F i l ix -e oe m in a (a ) ; var. : b—p l u m o s u m .
L I I I .—A t h y r iu m F i l ix -fc em in a , vars. ; A— m a r in u m ; b— c o n f l u e n s ; c—
STENODON.
L I I I Us.— A t h y r iu m F i l ix -fc em in a , vars. : A— c o n f l u e n s ; b— a l a t u m .
LIV .— A t h y r iu m F i l ix -f oe m in a , vars. : a— l a t i f o l iu m ; b —o d o n t o m a n e s .
LV.— A t h y r iu m F i l ix -f oe m in a , vars. : A— a c u m in a t u m ; b— e x c u r e e n s .
L Y i .— A t h y r iu m F i l ix -foe m in a , var. in c is u m .
LVI Us.— A t h y r iu m F i l ix -f oe m in a , var. p l u m o s u m .
L V I I .— A t h y r iu m F i l ix -f oe m in a , vars. : A— e h æ t ic u m ; b— l a x u m .
L V III.— A t h y r iu m F i l ix -f oe m in a , var. g r a c il e .
L IX .— A t h y r i u m F i l i x - f c e m i n a , vars. ■. a — l a c i n i a t u m ; b— l a c i n i a t u m
MAJUS.
LX.—A t h y r iu m F i l ix -f oe m in a , v a r s .\ a ~ in t e r r u p t u m ; b—i r r e g u -
LARE ; C— DISSEOTUM.
LX his.— A t h y r iu m F i l ix -f oe m in a , var. d is s e c t u m .
L X I .— A t h y r iu m F i l ix -f oe m in a , var. m u l t i f id u m .
L X II.-^A t h y r iu m F i l ix -f oe m in a , var. t h y s s a n o t u m .
L X IIL— A t h y r iu m F i l ix -f oe m in a , var. c o r t m b if e r u m .
LXIV.—A t h y r iu m F i l ix -f oe m in a , vars. : A— d e p a u p e r a t u m ; b—p o l y d a c -
TYLUM.
LXV.—A t h y r iu m F i l ix -f oe m in a , var. a c r o c l a d o n .
LX V l.— A t h y r iu m F i l ix -f oe m in a , var. c r is p u m .
LX V II.— A s p l é n iu m f o n t a n u m .
LX V ÎII.— A s p l é n iu m l a n o e o l a t u m .
LXIX.— A s p l é n iu m l a n c e o l a t u m , var. m ic b o d o n .
LXX.— A s p l é n iu m A d ia n t u m -n ig r u m .
ill
'iii
f I