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Plate m r .
ASPIDIUM ACULEATUM, Swartz.
F E R N S O F NO R TH AM ER IC A .
P l a t e L X I I .
A S P ID IUM A C U L E A T UM , S w a r t z .
Prickly Shield-Fern.
A s p i d i u m a c u l e a t u m :— Root-stock stout, ascending or
erect; stalks of variable length, commonly very chaffy with
broad and very narrow scales intermixed ; rachis chaffy-fibril-
lose; fronds one to three feet long, forming a crown, subcoriaceous,
oblong-lanceolate, acuminate, once or twice pinnate;
primary pinnæ closely .placed, short-stalked, lanceolate, or
linear-lanceolate from a broad base, often curved upwards,
incisely pinnatifid or again pinnate; secondary pinnæ or segments
of variable shape, rhomboid-oval and adnate or sessile,
or unequally triangular-ovate and auriculate on the upper
side of a slightly stalked base, entire or serrate or incised, the
lobes and teeth of all degrees aculeate; under surface more
or less chaffy and fibrillose; veins free; sori in two rows on
the segments, nearer the midvein than the margin; indusium
orbicular, attached by the depressed centre.
Aspidium cuuleatum, S w a r t z , “ in Schraders Journ. f. d. Botanik (1800),
ii,, p. 3 7 ; ” Syn. Fil., p. 5 3 .- „W iL L D E N 'O W , Sp. PL, v., p. 258.—
H o o k e r , Sp. Fil., iv., p. 18. — M i l d e , Fil. Fur. et Atlant., p.
104. — H o o k e r & B a k e r , Syn. Fil., p. 252. - „ F a t o n ; Ferns of
the South-West, p. 3 3 5 .
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