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Plate LV
ASPIDIUM MARGINALE, Swartz,
ArmalrtiruJ StCoLlth Boston
F E R N S O F NO R TH AM E R IC A .
P l a t e LV.
A S P ID IUM M A R G IN A L E , S wartz.
Evergreen Wood-Fern.
A sp idium m a r g in a l e : — Root-stock ascending, stout, shaggy
with long shining-brown chaffy scales ; stalks rather stout,
a few inches to a foot long, more or' less chaffy with shining
scales ; fronds standing in a crown, one to two feet long,
evergreen, sub-coriaceous, ovate-lanceolate, scarcely narrowed
at the base, pinnate or sub-bipinnate ; pinnæ almost sessile,
the lowest ones broadest, unequally triangular-lanceolate, the
middle ones lanceolate-acuminate, slightly broader above the
base ; pinnules or segments smooth and dark-bluish-grcen
above, paler and sometimes slightly chaffy beneath, adnate
to the narrowly winged secondary rachis, oblong or oblong-
lanceolate, often sub-falcate, varying from crenately-toothed to
pinnately-lobed with crcnuiatc lobes, obtuse or sub-acute,
those next the main rachis sometimes distinct, short-stalked,
sub-cordate at the base and with rounded auricles ; veins free,
forked or pinnately branched into from two to five curved
and usually conspicuous veinlets ; sori rather - large, placed
close to the margin of the segments; the orbicular-rcniform
indusia firm in texture, convex, smooth, often lead colored.