66 ferns . [T richomanes . 
Syn. — H ymenophyllum Wilsoni, Hook, in Br. Flo., Mack. — Hymenophyllum 
unilaterale, Newm. 
Fig. — E. B. Suppl. 2686. — Newm. p. 301 (1854). 
Des. — Leaf-stalk rigid, capillary, winged at the top. Leaf 1 or 
2 inches high, dark green. Pinnae alternate, bent backwards, 
growing horizontally rather than vertically as in the last species, 
besides which the lobes curve downwards, so that when the edge of 
them is looked at they have a falcate appearance, although they 
are oblong and blunt, and it may be added, very sharply serrated. 
When in fruit, all the leafy expansions turn in one direction, and 
the fruit in the opposite. The receptacles are situated as in the 
last species, but are larger, very convex, perfectly ovate, and entire. 
The narrow wing of the leaf-stalk, the different habit, the semi-pinnatifid 
character of the pinnae, and the entire, convex receptacles, serve to distin- 
guish this from Hymenophyllum Tunbridgense, with which it was confounded, 
until shown to be distinct by that accurate botauist, Mr. W. Wilson. — Miss 
Beever has sent me fronds from Coniston, which are much branched. 
Sit. — On moist alpine rocks, near waterfalls, &c. 
Hab. — Waterfall above Ambleside, Westmoreland, Mr. J. Bowerbank. 
Black Rocks of Great End, in the Scawfell range, and at Scale Force, near 
Buttermere, Cumberland (1833), Mr. H. C. Watson. Greenfield, near Saddle- 
worth, and near Silverdale, Lancashire, Miss Beever. — Wales : On Snowdon, 
near Llanberris Pass, and on the adjacent mountains, especially near Twll Du, 
Mr. W. Wilson. Rocks about Nant Phrancon, in situations from 200 to 
650 yards of elevation, Mr. II. C. Watson. On rocks near the Rliydol, 
Montgomeryshire, at a plank over a dangerous gulf of the river Pont Bren, 
Mr. E. Lees. — Scot. : Finlarig Burn, near Killin, Perthshire, Mr. Wilson. 
Argyleshire, Mr. J. Hooker. — Ire. : At Killarney (very plentiful), Mr. Wilson. 
Shannafolia Mountain, Mr. C. C. Babington. Kerry mountains, Connamara, Ac., 
Mr. Mackay. 
TRICIIOMANES, Linn. BRISTLE-FERN. 
(0 pi?, rpixog, a hair, and pctvog, loose or long; from the free hairs which 
terminate the receptacles.) 
A, pinnule of Trichomanes brevisetum. B, portion of ditto, with fruit enlarged. 
C, ditto, still more enlarged, to show the loose cellular structure of the leaf. 
D, longitudinal section of the sorus magnified. E, theca, with transverse ring. 
F, spores. 
Mil the species of this beautiful genus, amounting to forty-six in number, are 
very cellular and tender, their fruit attached, to the midrib of a lobe, as in the 
last genus, but here the receptacle is one-valved, and the midrib not terminated 
by the thecae, and confined within the receptacle , but projecting much beyond it, 
and like a hair in appearance. We have but one species, and that very rare. 
