THE BUCKLER FERN. 
SYNOPSIS CF THE SPECIES. 
Thelypteris.— Veins usually forked, both branches (anterior and 
posterior venules) fertile; sori submarginal ; indusium irregular, 
Fugacious. : ! 
* Fronds smooth. 
1. L, Thelypteris: fronds not narrowed below, pinnate-pinnatifid ; caudex slender, 
elongately creeping. 
** Fronds resinose-glandular beneath. 
2. L. montana: fronds much narrowed below, pinnate-pinnatifid ; caudex thick, 
short, decumbent. 
var. cristata: fronds corymbosely branched near the apex, the branches 
as well as the pinne multifid-crisped at their apices. 
$ Dryopteris,— Veins forked, or sometimes pinnate, the anterior venule 
Jertile ; sort medial or subterminal; indusium prominent. 
* Serratures of pinnules not spinose-nvucronate. 
+ Indusium plain or not margined with stalked glands. 
3. L. Filix-mas: fronds lanceolate, subbipinnate or bipinnate ; pinmules oblong- 
obtuse, serrate-crenate. 
(a) Fronds normal. 
var. incisa: pinnules pyramidal-oblong, deeply lobed, the lobes serrate ; 
margin of indusium spreading. 
var. paleacea: pinnules oblong obtuse, subglaucous beneath, serrate-crenate ; 
rachis densely scaly ; margin of indusium incurved. 
var. Pinderi: fronds narrow elongate lanceolate much narrowed below and 
above; pinnules, sori, and scales as in paleacea. 
r. abbreviata: dwarf, glandular, subbipinnate; pinnules broad obtuse 
confluent, crenate-lobate ; indusium beaded with glands. 
. pumila: dwarf, glandular, subbipinnate ; pinnules small obtuse con- 
fluent, convex, (pinne concave); sori usually uniserial ; indusium 
ineurved and beaded with glands. 
. erispa: dwarf, crispy, scarcely bipinnate; pinne and segments 
crowded imbricated, wavy, the latter convex, serrate. 
. Bollandie: fronds ovate-lanceolate, subbipinnate ; pinn broad ; pin- 
nules elongate oblong, obtuse, lobed, somewhat wedge-shaped at the 
base, and decurrent with the narrowly winged rachis, the lowest 
only distinct. 
(b) Fronds monstrous ; apices of fronds and pinne multifid-crisped. 
var. cristata: normal in size and outline ; pinne short, narrowed gradually 
to the much enlarged ramosely-tasselled apex. 
var. polydactyla: normal in size and outline; pinne parallel-sided, abruptly 
contracted below the small crisp-tasselled apex; pinnules or lobes 
divided nearly to the rachis throughout. 
var. Jervisii: normal in size, caudate-acuminate ; pinne gradually narrowing 
to the multifid or subcristate apex ; upper lobes shallow confluént. 
var. Schofieldii: fronds dwarf (2-6 in.), frequently ramose or multifid, some- 
times crisped, pinnate ; pinne oblong, lobed or serrate. 
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