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choides of eastern North America, and A . nitmitum of the
western side of the continent. The first has a decidedly stalked,
broader frond, the lower pinnæ scarcely reduced in size, and the
fertile ones much contracted. Aspidium znunitum, to be figured
presently, is usually a much larger plant than that now
under consideration, has a well-developed stalk, and usually
elongated pinnæ, the lower ones scarcely reduced.
The genus Aspidium, as understood by Mettenius, contains
not less than three hundred and fifty species, by far the greater
part with reniform indusia. Hooker and Baker separate this
portion under the name of Nephrodium, keeping Aspidium for
the species with orbicular indusia. Polystichum, of Roth, is an
older name than Aspidium, and would seem to have been originally
intended to have nearly the same application. Schott, and,
after him, Presl and Moore, have limited the use of the name to
the species with orbicular indusium and free veins ; while Koch
has chosen to give the name to the species with reniform
indusia, and to call Schott's Polystichum by Swartz’s name of
Aspidimît. But the signification of the word Polystichum
iinanyjows) is inapplicable to most A s p id ia ; and perhaps this
is the best reason for adopting the name proposed by Swartz.
Plate XX II., Fig. i .— Aspidium Lonchitis, ixom Owen Sound, Canada,
collected by Mrs. William Roy, The smaller figure to the right of the
stalk shows a fruiting pinna.
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P l a t e X X II. — F ig . 2.
WOODWARDIA A N G U ST IFO L IA , S mith.
Netted C h a in -F e rn .
W o o d w a r d i a a n g u s t i f o l i a : — Root-stock rather slender,
creeping, elongated; stalks scattered, six to twelve inches high,
chaffy only at the base; fronds ovate-oblong, membranaceous,
smooth, pinnatifid; the sterile ones six to twelve inches long,
two-thirds as broad, having ample lanceolate finely serrulate
divisions united at the base by a broad wing, the veinlets
forming several rows of oblong-hexagonal areoles ; fertile fronds
taller, having almost disconnected narrowly linear segments,
the areoles in a single row each side the midvein, each areole
containing an elongated sorus covered by an arched indusium
attached by its outer margin to the fruiting veinlet.
Woodwardia angustifolia, Sm ith , in Mem. Acad. Turin, v ., p. 4 1 1 .— T o r r
e y , FI. N.Y., ii., p. 4 9 0 . — G r a y , Manual, ed. i., p. 6 2 5 ; ed. ¡i.,
p. 5 9 3 , t. X., figs. I , 2 , 3 . — B e c k , Botany, ed. ii., p. 4 6 2 . — M e t t e -
Nius, Fil. Hort. Lips., p. 66, t. vi., figs. 6, 7. — L a t o n , in Chapman’s
Flora, p. 5 9 1 .— W ood, Botanist and Florist, p. 3 7 1 .
Woodwardia Floridana, S c h k u h r , Krypt. Gew., p. 103, t. i n .
Woodwardia onocleoides, W il ld en ow , Sp. PI., v., p. 416. — P u r sh , FI. Am.
Sept., ii., p. 669. — B ig e low , FI. B os t, ed. iii., p. 423. — W ood,
Class-Book, p. 632.
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