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H ab.— Holes and crevices of limerock in a hummock at Miami,
Florida, G arber. Florida, Binney in Torrey’s herbarium. Carolina, according
to Moore (Index, p. 124). West Indies and tropical America.
D e s c r i p t i o n : — Dr. Garber says of this fern; “ Like the
other small species of the genus it grows out of the crevices
of limerock, and sometimes by the close grouping of the little
tufts, covers the entire face of shaded rocks ; but instead of
being found on the sides of rocky ledges like the northern
species it is restricted to rocky sides of depressions, or rock-
holes, lower than the surrounding surface.”
The root-stocks are nearly erect though short. The
fronds are somewhat dimorphous, the sterile ones being both
smaller and on shorter stalks than the fertile ones. The
upper part of the stalk and the flattened rachis are green,
much as in A . viride. The pinnae are from four to ten on
each side, the terminal one obtuse, and often as large as any
of the others. They are roundish-obovate in the sterile fronds,
ovate-oblong or slightly rhomboid-ovate in the fertile fronds.
They are crenated or even crenately lobed. The veins are
few, and the sori near the midvein. The superior basal
sorus is often double, a common thing in most Asplenia.
Plate LX X X .—Fig. 1-3 . Asplenium dentatum ixomYXordrz.. Fig.
2 is an enlarged fertile pinnule. Fig. 3, a spore, wing-margined and
covered with netted ridges.
P l a t e LX X X .— F jg . 4 -9 .
A S P ID IUM M O H R IO ID E S , B ory.
F a lk lan d Is lan d s Sh ie ld -F e rn .
A s p i d i u m m o h r i o i d e s : — Root-stock rather stout, short,
erect or ascending, very chaffy; stalks clustered, one to six
inches long, very chaffy with large ovate-acuminate scales
intermixed with smaller ones and paleaceous hairs; fronds
coriaceous or sub-coriaceous, at first chaffy, four to twelve
inches long, oblong lanceolate, sub-acute, narrowed slightly
from the middle to the base, pinnate ; pinnæ numerous, six
to eighteen lines Jong, crowded, usually imbricated, ovate or
ovate-lanceolate, obtuse, pinnately lobed with crenately toothed
segments, or in very large fronds again pinnate with crenated
ovate-trapezioid obtuse pinnules, the teeth obtuse or barely
pointed, never mucronate; sori on the upper pinnæ; indusia
orbicular, fixed by the centre, smooth, very large and often
imbricated.
Aspidium mohrioides, Bory de St. V incent, in Bot. Voy. de la Coquille,
p. 267, t. 35, fig. i ; “ Mém, Soc. Linn. Paris, iv., p. 597.”—
J. D. H ooker, Fl. Antarctica, ii., p. 392. t. cxlix.—M ettenius,
Aspidium, p. 45.— H ooker, Sp. F il, iv., p. 26.— H ooker &
Baker, Syn. F il, p. 262.
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