582 
CVIII. I'OLYPODIACEiE. 
[. Aspidium . 
2. W. Ilvensis Br. ( [oblong TF.) ; fronds lanceolate pinnate, 
pinnffi oblong deeply pinnatifid with many oblong segments, 
rachis and stipes with numerous chaffy scales. E. B. S. t. 2616 : 
Newm. p. 136, 137 ; ed. 3, p. 71, 73. Acrostichum L. 
Mountains, rare. Caernarvonshire. Falcon Clints near Caldron- 
Snout, Teesdale in Durham. Hills to the north of Moffat; Clova 
mountains. 2/.. 7 — 9. — Plant small, — 5 inches high. 
5. Aspidium Sw. Shield-fern. (Tab. IX. f. 4.) 
Sori roundish, scattered. Involucre above the sori circular, 
or reniform. — Veins simple or forked (in the British species ). — 
Xame: aamcwv, a small shield ; which its involucres resemble, 
especially in the species of the first division. 
* Involucre circular, attached l>y the centre, hence peltate. Aspidium Br. 
Polystichum Roth (in part). (Tab. IX. f. 4. a. b .) 
1. A. LoncMtis Sw. (Alpine S ., or Holly- fern) ; fronds rigid 
linear-lanceolate pinnate, pinnse lanceolate-falcate acute ciliato- 
serrate, the upper base acutely auricled the lower one cuneate, 
superior pinnrn bearing the sori, stipes chaffy. Polypodium L. : 
E. B. t. 797. Polystichum Roth : Newm. p. 166, 167; ed. 3, 
p. 107, 108. 
Shady clefts of rocks and under stones, on high mountains. York- 
shire ; Caernarvonshire. Scotland. Ireland. If.. 6,7. 
2. A. lobdtum Sw. (close-leaved prickly S .) ; fronds oblong- 
lanceolate bipinnate (or when starved pinnate), pinnules rigid 
convex ovate sublunate acuminate aristate oblique and cuneate 
at the base and decurrent, the margins faintly serrate spiriulose, 
with a distinct tooth at the base of the upper side, the one next 
the main rachis longer than the rest, stipes and rachis more or 
less chaffy, sori confined to the upper half of the fronds. E. B. 
t. 1563. Polystichum aculeatum Neivrn. (in part) p. 169; ed. 
3, p. 111. 
Moist woods, shady banks, and rocky places. "if.. 7. — A stunted 
form of this sometimes occurs with the pinnules combined, so as to 
form only a pinnate frond. This is A. aculeatum 0 Sin. and Filix 
lonchitidi affiuis of Ray : but as cultivation in a better soil causes 
the root to produce bipinnate fronds, it can scarcely be deemed a 
distinct variety. 
3. A. aculeatum Sw. (common prickly S.) ; fronds broadly lan- 
ceolate bipinnate, pinnules subrigid somewhat convex slightly 
stalked ovate sublunate acuminate or acute aristate obliquely 
truncate and auricled at the base on the upper side, the one next 
the main rachis somewhat larger than the rest, the margins 
distinctly serrate and spinulose, stipes and rachis chaffy, sori 
