Woodsia .] 
CVIII. POLYPODIACEzE. 
581 
4. P. calcdreum Sm. ( rigid three-branched, or limestone P.) ; 
fronds subternate bipinnate rather rigid subpubescent and 
always minutely glandular beneath, divisions sometimes spread- 
ing and deflexed, segments obtuse somewhat crenate, sori 
marginal finally confluent. E.B. t. 1525 : Newm. p. 135. P. 
llobertianum Hoffm. Gymnocarpium Newm. ed. 3, p. 63. 
On broken limestone ground in the northern and western parts of 
England. 21 . 7. — Rhizome stouter and less extended than in the 
preceding ; from which it is also distinguished by its thicker and 
more rigid texture, consequently more erect habit, its more pectinate 
subdivision, and by the minute glandular pubescence covering the 
rachis and midrib of the pinna; ; but we consider it a very doubtful 
species. 
5. P. alpestre Iloppe ( Alpine P ) ; glabrous, fronds oblong- 
lanceolate bipinnate, pinnules oblong-ovate sometimes slightly 
falcate subacute sessile more or less deeply pinnatifid, segments 
ovate inciso-serrate, stipes short with large scales. — a. elutius ; 
stipes rather short, pinna narrow-lanceolate broadest at the 
base spreading or ascending, pinnules crowded. Pseudathyrium 
Newm. ed. 3, p. 199. Aspidium Schk. Fil. p. 58, t. 60 (A. 
umbrosum on the plate) excellent. — ft. humile ; stipes scarcely 
any, pinnae short ovato-lanceolate spreading or deflexed, pinnules 
rather distant. Pseudathyrium flexile Newm. ed. 3, p. 203. 
Mountains of Invernesshire, Aberdeenshire, Forfarshire, and Perth- 
shire ; at an elevation of from 2000 to 4000 feet. — j3. Glen Prosen, 
and probably elsewhere, mixed with a. 21 . 7, 8. — Very similar to 
and easily mistaken for Aspleninm Filix-fcemina : the fructification, 
however, will at once distinguish it. 
4. Woodsia Br. Woodsia. (Tab. IX. f. 3.) 
Sori scattered, roundish, having beneath them an involucre 
which is cut at the edge into many, often capillary, segments. 
— Named in compliment to Joseph Woods , Esq., author of an 
excellent “Monograph of the British lioses,” “Tourist’s Flora,” 
&c. 
1. W. hyperborea Br. ( round-leaved IF.) ; fronds lanceolate 
pinnate, pinna bluntly triangular or oval inciso-pinnatifid, 
rachis and stipes with scattered hairs. Polypodium Sw. W. 
alpina Gray: Newm. p. 143; ed.3, p. 79. — a. pinna broadly oval, 
lobes 3 — 5 roundish-obovate. Pol. hyperboreum a. Wahl. FI. 
Lapp. p. 279. — f3. pinna longer more pinnatifid, lobes 5 — 9 oval. 
P. hyperboreum /3. gracile Wahl. : E. B. t. 2023. 
On Snowdon, Caernarvonshire. Ben Lawers and near Crieff, 
Perthshire ; Glen Fiadh, Clova 0. Ben Lawers. 1/. . 7. — About 
the same size as the next, and perhaps not specifically distinct. Mr. 
Babington and Mr. Bentham unite them. 
C C 3 
