30 
FERNS. 
[ Woodsia. 
them at first in a hag, it then becomes split into numerous segments, which look 
tike hairs interspersed with the thecce, and were so considered until Mr. Brown 
showed their time nature in ‘ Trans. Linn. Soc.,’ vol. xi. 
WOODSIA 1LVENSIS. 
OBLONG WOODSIA. HAIRY WOODSIA. DOWNY HAIR-FERN. 
ray’s IVOODSIA. 
(Plate I, fig. G, a.) 
Ciia. — Leaf pinnate, lanceolate, scaly. Pinnae lanceolate, blunt, 
more or less deeply pinnatifid, crenate. 
Syn. — Woodsia Ilvensis, Brown, Smith, Hook., Spreng. — Polypodium Ilvense, 
Swz., Willd., Schk. — Acrostichum Ilvense, Linn., Huds., Ehrh. — Polypo- 
dium Arvonicum of With., in description but not in references.* 
Fig. — E. B. Supp. 2616.— Flo. Dan. 391. — Pluk. Phyt. 281 ,fig. 4 {good). 
Des. — Rootstock perennial, tufted, black, smooth. Leaves 
numerous, 1 to 4 inches high, covered with capillary, brownish- 
white scales. Leaf-stalk scaly ; the lower third of it without pinnae, 
the upper two thirds containing six to eight pairs, placed nearly 
opposite to each other. Lower pinnae cut into from four to six 
blunt segments on each side. Sori scattered, convex, consisting of 
five or six roundish thecae. Indusium torn into a few capillary 
divisions. 
Mr. Sowerby observes, that the capillary segments of the indusium are not 
so numerous as in the next species, and the thecae more spherical. The plant 
cultivated and formerly sold at the London nurseries, under the name of Woodsia 
Ilvensis, is Notholama distans, a plant in every respect different from ours, which 
is much smaller, and less white and downy than that New Holland species. 
Sit. — On rocks in mountainous countries. 
IIab.— H igher parts of the Tees, Mr. J. Hogg. Hocks (near where Oxytropis 
campestris grows), between Glen Dole and Glen Phee, in the Clova Mountains, 
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 
Carinthia, the Giant and Hartz Mountains, &c. ; in Sweden, Norway, and the 
Isle of Elba or llva (whence the name Ilvensis) ; also in Italy, Siberia, and on 
the Pyrenees. Pursh says, from Canada to Virginia ; but it may be much doubted 
if our plant be here indicated. 
WOODSIA HYPERBOREA. 
ROUND-LEAVED woodsia. 
(Plate I, fig. G, b.) 
Ciia. — Leaf pinnate, linear-lanceolate, nearly smooth. Pinnae 
triangular, blunt, deeply crenate. 
* I cannot refer to Withering’s Polypodium Arvonicum and Ilvense with certainty, as his 
descriptions of these two plants are very obscure and far from characteristic. 
