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P E L LÆ A G R A C IL I S , Hooker.
PELLÆA ATROPUfRPUREA, Link
Annstronij &. Co. Lith. Bo ston
F E R N S O F NO R TH AM E R IC A . 59
P l a t e LIV. — F ig . 1 - 3 .
P E L LÆ A T E R N IFO L IA , L i n k .
Trifoliate Cliff-Brake.
P e l læ a t e r n i f o l i a : ^Root-stock short, thick, nodose,
chaffy with very narrow dark-brown scales; stalks clustered,’
purplish-black and polished, three to six inches long ; fronds’
as long as or longer than the stalks, oblong-linear; pinnæ from
four to fifteen pairs, all but a few of the highest ones deeply
tripartite; segments elongated-oval or linear-obovate, subcoriaceous,
somewhat glaucous beneath, green above, slightly
mucronate, the middle one in large fronds indistinctly petiol-
ulate; fertile ones with the edges much recurved; involucre
broad, the edge only membranaceous.
PA æ a ternifolia. L in k , Fil. Hort. Berol., p. 5 9 . - F É E , Gen. Fil., p.
1 2 9 . -H 0 0 K E K . Sp. F.I., i., p. 14 2 ; Fil. Exot., t. x v . - F o u e -
n ie k , Pi. Mex., Crypt., p . 1 1 8 .— E aton, Ferns of the South-
west, p. 32 1.
Pteris ternifolia, C a v a n il i.e s , '■ Præl. 18 0 1, No. 6 s 7 . " ^ H o o k e r & G e e v
i l l e , Ic. Fil., t. 126.
Platylonsa ternifolimn, J. Smith.—B r a c k e n r id g e , Fil. U. S. Ex. Exped
p . 94 .
AUosarus ternifolius, K d n z e , in Linnæa, xxiii., p . 2 2 0 .
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