Anriijlronç &. Co Li Ûi B o stcn
F E R N S O F NORTH AM E R IC A . 159
P l a t e LXVII.
A S P ID IUM F LO R ID AN UM , D. C . F a t o n .
Florida Wood-Fern.
A s p i d i u m F l o r i d a n u m Root-stock stout, creeping, very
chaffy with large thin ferruginous-brown scales; stalks nearly
a foot long, rather stout, discolored and chaffy near the base,
stramineous and less chaffy upwards ; fronds standing in a
crown, firmly membranaceous or subcoriaceous, the fertile and
sterile unlike; sterile fronds lower, lanceolate-oblong, pinnate,
the pinnæ lanceolate from a broad base, pinnatifid rather
more than half-way to the midrib, lower ones shorter, broader
and more deeply lobed, segments close-placed, oblong, obtuse,
obscurely crenulate-toothed ; fertile fronds two to three feet
long, lanceolate, tapering both ways from the middle, pinnate;
lower pinnæ sterile, triangular-lanceolate, deeply pinnatifid like
those of the sterile frond; upper pinnæ fertile, longer and
narrower, pinnate with usually distant oblong or sub-falcate
obtuse crenulate-toothed pinnules, which are sessile on a
narrowly winged secondary rachis, or the lower ones barely
stalked; lowest superior veins twice forked, the rest once
forked; sori rather large, half-way between the midvein and
the margin ; indusium round-reniform, smooth.
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