474 
FILICES. 
[. Adianlum . 
2. A. caudatum, Linn.j Hook, and Baker , Syn. Fil. 115. Root- 
stock erect ; scales very minute, linear, dark brown. Stipes densely 
tufted, slender, wiry, chestnut-brown, 1-4 in. long. Frond lanceolate, 
simply pinnate, often drawn out and rooting at the tip, 4-9 in. long, 
1-1 1 in. broad, subcoriaceous, varying from densely pilose to glabrous. 
Segments sessile, trapezoid, straight and entire on the inner and lower 
side, deeply lobed on the upper and outer. Yeins fine, close, radiating 
from the basal inner corner of the segments. Sori orbicular or oblong- 
reniform, confined to the tip of the lobes. A. hirsutum, Bory ; Bojer , 
Hort. Maur. 404. A. rhizophorum, Sw. ; Bojer , loc. cit. 
Mauritius, Rodriguez, and Seychelles, frequent in the crevices of rocks. 
Round Island, Sir H. Barkly ! Flat Island and Coin de Mire, Borne ! Spread 
through the tropics of the Old World. A. hirsutum is the pilose and A. rhizo- 
phorum the subglabrous form of the species. 
3. A. hispidulum, Sw. ; Hook, and Baker, Syn. Fil. 126. Root- 
stock short-creeping ; scales very minute, brown, linear. Stipe glossy, 
slender, naked, castaneous, 4-9 in. long. Frond deltoid, 6-9 in. long, 
bright green, finely pubescent, pedate, the central division simply 
pinnate, the outside ones forked 2-3 times from the lower side at the 
base. Segments close, sessile, trapezoid, \ in. broad, cut away in a 
straight line on the inner and lower edge, crenate on the upper and 
outer. Yeins very fine and close, radiating from the point of attachment 
of the segments. Sori many, small, orbicular-reniform, confined to the 
upper and outer edges of the segments. A. pubescens, Schk. ; Bojer, 
Hort. Maur. 404. 
Mauritius, and Rodriguez, in crevices of rocks. Spread through the warmer 
regions of the Old World. 
5. A. Capillus-veneris, Linn. ; Hook, and Baker, Syn. Fit. 123 
Rootstock creeping, as thick as a quill. Scales very minute, brown, 
linear. Stipe nearly black, slender, glossy, naked, 3-9 in. long, 
Frond deltoid, \-l ft. long, bright green, membranous, glabrous, 3-4- 
pinnate. Pinnae and pinnules deltoid, the lowest much the largest. 
Segments deltoid, stalked, erecto-patent, | in. broad, deeply lobed 
from the upper border only. Yeins fine, close, radiating from the base 
of the segments. Sori oblong-reniform, several to each segment. In- 
volucre firm, broad, persistent 1 in. broad. 
Mauritius and Rodriguez, in caves and by streamsides. Everywhere in the 
tropical and warm temperate zones of both hemispheres. 
4. A. sethiopicum, Linn. ; Hook, and Baker, Syn. Fil. 123. Root- 
stock slender, wide-creeping. Scales very minute, linear, dark brown. 
Stipe naked, wiry, glossy, nearly black, |-| ft. long. Frond deltoid, 
glabrous, bright green, \-l ft. long, 4-pinnate. Pinnae and pinnules 
stalked, deltoid, the lowest much the largest. Segments orbicular, 
with a truncate or broad-cuneate base, in. broad, crenate round the 
upper border. Yeins fine, close, radiating from the base. Sori 
