W oodsia.] 
FERNS. 
27 
Forfarshire, at 550 yards of elevation, Mr. II. C. Watson (from which station it 
is larger than the Welsh plant). On the Basaltic Rocks, called Falcon Clints, 
near Caldron Spout, Teesdale, Mr. R. B. Bowman. Glydes-vawr, near 
Lyn-y-cwm, Mr. Winch. Last seen in July, 1836, by Mr. W. Wilson. 
Geo.— Found in different parts of Germany, as on the Alps of Salzburg and 
Carintliia, the Giant and Hartz Mountains, &c. ; in Sweden, Norway, and the 
Isle of Elba or Ilva (whence the name Ilvensis) ; also in Italy, Siberia, and on 
the Pyrenees. Pursh says, from Canada to Virginia ; hut it may he much doubted 
if our plant be here indicated. 
WOODSIA HYPERBOREA. 
ROUND-LEAVED WOODSIA. 
(Plate I, fig. 6, B.) 
Cha. — Frond pinnate, oblong, nearly smooth. Pinnae triangular, 
blunt, deeply crenate. 
Syn. — Woodsia hyperborea, Br., Hook., Smith, E. FI., Gulp.— Acrostichum 
Alpinum, Bolt. — Ceterach Alpinum, Lam., Decan. — Polypodium byper- 
boreum, Swz., IVilld., Sprang., Smith, in E. B. 
Fig. — E. B. 2023. — Bolt. 42. — ‘Linn. Trans.,’ vol. xi. — Pluk. Pliyt. 89, f. 5. 
Des. — Root perennial, fibrous, black, tufted, and very long, 
giving rise to many oblong fronds, from 2 to 4 inches high. Lower 
part of the stem covered with light-brown capillary scales. Eight 
or ten pairs of pinnae, only the two or three lower pairs opposite, 
and these not constantly so, all nearly smooth, bluntly triangular, 
deeply crenate, or cut into two or three segments on each side. The 
upper half of each pinna larger than the other, and in luxuriant 
specimens cut into lobes near the stem. Sori from six to ten on 
each pinna, placed near the edge, light brown, very large, and often 
confluent. 
From the very numerous segments of the indusium, a sorus appears like a 
hunch of hairs. The discriminating character is, however, chiefly the less cut, 
shorter, and more alternate pinnae. The plant known as Woodsia hyperborea 
by gardeners is in reality a large variety of Woodsia Ilvensis, known as such 
before the separation of the present from that species. 
Sit. — Found only on the highest rocks and mountains of Wales and Scotland. 
Hab. — Ben Lawers, Dr. Murray and Mr. W. Wilson. Clova Mountains, Mr. 
G. Don. Craig Chailleach, Perthsh., Mr. Maughan. Mael Ghyrdy, Pertlish., 
and on Snowdon, below Bwlch-y-Saeth (Clowwyn-y.Garnedd), at an elevation of 
2500 feet and upwards, very sparingly, Mr. W. Wilson. Mr. C. C. Babington 
says, “ I was not able to find this plant on Glydr Fawr, Caernarvonshire, July 
1835, although in company with J. Roberts, Esq., of Bangor, who knew its 
station well. It is, I fear, exterminated in that place.” I searched for it in the 
same spot in 1837, and a botanical friend in 1840, but both without success. 
Geo. — Lapland, Germany, (?) France, (?) (Swz.), Lulea, in Lapland (Spreng.), 
Canada, and high mountains of Pennsylvania and Virginia. 
