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410 GO. ACROSTICHUM.
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6G. A. teaum, Wilid. ; rhizome tliick, woody, the scales dense, linear, rigid,
hlack • S t . 3-4 in. 1., firm, erect, clothed with small furfuraceous adpressed aud a
few spreading scales ; barren f r . C-12 in. 1., J - f in. hr. narrowed gradually to
hoth ends : texture coriaceous; lower or botli sides clothed with small th in
scales which are brown, darker in the centre, ultimately h le a c h tt; vems
hidden ; fertile f r . narrower th an the others, on longer stems.—A. rubiginosum,
Fee. m . Sp. 6. p . 222.
Hab Mexico and West Indies to South Brazil and Peru.-Distinonished by its long
narrow frond, the upper surface of which is nearly or quite naked, with the scales
beneath, though dense, thin and closely adpressed. A. Schiedei and nivosum of Kunze
appear both to belong here.
67. A. Bellermanianum, K lo tz s c h ; rhizome ivoody, the scales dense, linear,
glossy, reddish-brown; st. 3-6 in. 1., firm, erect, densely clotlied with large
spreading ovate-lanceolate pale-brown scales ; barren f r . 4-C in. I., 1 j - l j in. hr.,
the point very blu n t, the base cuneate or rather rounded ; textnre coriaceous;
botli sides with small scattered furfuraceous scales, those on the midrib beneath
black in the middle ; veins slightly raised, usually once forked ; fertile f r . much
narrower th an the others and on longer stems.—Hk. Sp. 6. p. 236,
Hab. Columbia and Ecuador.—Habit and texture of A. conforme.
68 A. m u s c o s u m , , Sw .; r h i z o m e woody, sliort, the scales dense, glossy, linear,
briglit chesnut-brown ; S t . 4-6 in. 1., firm, clothed with large ovate spreading
pale-hrown ciliated scales ; b a r r e n f r . 6-12 in. 1., 1-1J in. hr., narrowed at lioth
ends ; t e x t u r e coriaceous ; upper s u r f a e e slightly scaly, a t last often naked, lower
quite hidden hy imbricated ovate-acuminate sliort-cihated terruginoiis scales,
which are often dark chesnut-brown in the middle ; b a r r e n fl-. much smaller
th an the other, the st. longer.—7 f t. Sp. 5. p . 231. A. Laiigsdorflii, 77. £ Cr.
t . 234.
Firmer in texture than A. squamosum, and often glabrous above when mature, but even
more densely scaly beneath, but tbe cilia of the scales much shorter. A. polylepis, Kze.,
A. rupestre, deorsum, caulolepia, and truncicola, Karst., are either this or closely allied.
59. A. obducUm, Kaulf. ; rhizome woody, the scales dense, rigid, fibrillose,
black ; st. 8-4 in. 1., firm, erect, the scales small, peltate, and also linear, with a
hlack centre and grey edge ; barren f r . 12-15 in. 1., 1 - l j in. hr., the point acute,
the base narrowed gradually ; subcoriaceous ; upper surface naked, lower
th in ly matted with small pale peltate scales ; veins conspicuous ; ferUle f r . much
smaller th an th e other.—7 f t. Sp. 6. p . 237.
Hab. Mauritius and Bourbon.—Most like the large forms of viscosum in hahit and
texture. The scales are altogether peltate and very minute, and the coating, though
close, is very thin, and easily rubs away. The American A. elongatum, Kze., gathered
in Peru hy Poppig, and in Brazil by Lindberg, does not appear to be safely separable
from this.
60. A. a u r i c o m u m , Kunze ; c a u d . erect, woody, th e scales linear, reddish-
brown ; S t . 2-3 in. 1., densely clothed with spreading linear and soft fibrillose
scales lik e those of the b a se ; b a r r e n f r . 12-18 in. 1., I J in- bi’-j t ' /
acuminate, the lower p a rt narrowed very gradually ; t e x t u r e subcoriaceous ;
upper s u r f a c e naked or slightly scaly, lower thinly matted with minute hright-
hrow'ii scales, densest and longest on the midrib ; v e i n s close, mostly simple ;
f e r t i l e f r . 1 ft. 1., f in. br., the s t . 6 in. 1 .-7 7 /. Sp. 5. p . 239.
Hab. Andes, from Columbia to Peru, and reported by Fde from Mexico.—Probably
a variety ot squamosum. The scales are bright reddish-brown, and reduced down, except
on the midrib, to mere stellate tufts of hair. A. meridense, Klotzsch, is like this, except
that the stem is longer, aud the scales of the stem and midrib are not so narrow or so
dense.
61. A. t o m e n t o s u m , Bory ; r h i z o m e woody, tlie scales dense, hlack, fibrillose ;
S t. f i b in. 1., rigid, erect, densely clothed with linear short-ciliated scales, of
scales like those of the stem and small adpressed white furfuraceous ones; veins
distant ; fertile f r . narrower than the other, on a stem 1 ft. or more 1.—A.
heterolepis, Fée. H k . Sp. b. p. 234.
Hab. Bourbon.—Not unlike A. Sieberi in texture and
general habit, but densely scaly,
and the scales peculiar.
62. A. cuspidatum, Willd. ; rhizome thick, woody, the scales dense, linear-
snbulate, black, or nearly so ; st. 6-16 in. 1., firm, erect, clothed with deciduous
adpressed dark-coloured scales; barren f r . 1-2 ft. 1., 3-4 in. hr., the point
cuspidate, the base not narrowed very gradually ; texture coriaceous ; upper
surface nearly naked, lower densely matted with small furfuraceous ciliated
brown scales ; veins fine and close ; fertile f r . rather smaller th an the other, the
stem about the same.—H k . Sp. 6. p . 236. A. Lindigii, K a rst, t. 3.
Hab. West Indies to Peru.—The representative of J . latifolium in thia group. The
scales, though dense, are altogether adpressed and peltate, as in obductum. A. lamina,
rioides, Bory, seems to be closely allied.
63. A . perelegans. Fée ; rhizome woody, the scales linear, dark-brown ; St. 6-8
in. 1., firm but slender, slightly scaly ; barren f r . 8-12 in. !., I J - I J in. hr., the
point suhacute, the base narrowed rather suddenly ; texture subcoriaceous ;
lower surfaee matted all over with small hright-brown scales, which are scattered
over the upper surface ; veins conspicuous, usua lly simple ; fertile f r . linear.—
Hk . Sp. 6. p . 232.
Hab. Dominica, Imray, 101, and reported also from Brazil and Peru.—Most like the
last, but not so coriaceous. The scales beneath are not matted so densely, and though
all small, as compared with those of squamosum aud muscosum, are some of them lanceolate
and ciliated.
64. A. Sprucei, Baker ; rhizome woody, sliort-creeping, the scales dense,
fibrillose, bright reddish-brown ; st. 1 ft. or more 1., rather slender, thickly
clothed throughout with decurved pale-brown linear scales, some J in. 1. ;
barren f r . 2 ft. 1., 3 in. br., narrowed to both ends ; texture herbaceous ; veins
distinct, usually simple, J in. apart ; upper surfaee thinly clothed with scales
like those of the stem but smaller, the lower more th ick ly with pale scales, which
are cordate, broad and distinctly ciliated in the lower half, then narrowed
suddenly to a linear point ; fertile f r , unknown.
Hab. Foot of Mount Chimborazo, Spruce.—The peculiar scales of the lower surface
are enough scattered to be each seen as a distinct object.
66. A. squamosum, Sw. ; rhizome woody, the scales dense, rigid, linear, nearly
black ; st. 2-4 in. 1., densely clothed wdth unequal lanceolate ciliated pale or
dark-brown scales, the lower ones often nearly black ; barren f r . 6-12 in. 1.,
j-1 in. br., tlie point acute, the base narrowed gradually ; texture thick but
flaccid ; both sides matted and the edge densely ciliated with bright reddish-
hrown ciliated linear or lanceolate scales ; veins hidden ; fertile f r . as long as the
other but much narrower, the steins much longer. — H k . Sp. 6. p . 240. A.
vestitum (paleaceum on the plate), H k . £ Gr. t. 235.
Hab. Mexico and West Indies to Ecuador and the Amazon Valley ; Sandwich Isles,
Sumatra, Ceylon, Neilgherries, Mascaren Isles, Guinea Coast, Madeira, Azores —Distinguished
by its soft texture and copious long-ciliated scale.s. A. plumosum, Fée, and
probably A. Wageneri, Kze., may be placed here with confidence.
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