40 
FERNS. 
[ Asplenium. 
6 . — ASPLENIXJM RUTA-MURARIA. 
WALL RUE. RUE-LEAVED SPLEEN WORT. TENTWORT. 
(Plate 3, fig. 6.) 
Ciia. — F rond bipinnate, Pinna alternate. Pinnules ovate or 
wedge-shaped, with rounded notched extremities. 
Syn. — Asplenium Ruta muraria, Linn., Willd., Hook., Smith, Bolt., Bull., 
Ehrh., Huds., With., Gulp., Light/. — Asplenium murale, Bernh., Gray. 
Scolopendrium Ruta muraria, Roth. — Phyllitis Ruta Muraria, Moench. 
Ruta muraria, Bauh., Ray., Ger., Plum. 
Fig. — E. B. IbO.—Bolt. 16.— FI. Dan. 190.— Bull. Fr. lOb.—Plum- Fil. 
t. a./. 3. 
Des. — Root tufted, black, very long. Frond from one to four 
inches high, dull green. Rachis green except at the very base. 
Pinna; confined to the upper half, from three to five or six in num- 
ber, placed alternately, for the most part distinctly, three cleft. 
Pinnules ovate in small fronds, wedge shaped in the larger, their 
tips rounded and crenate or unequally notched. Barren fronds 
broader and shorter. Sori dark brown, finally confluent, and cover- 
ing the whole under surface. Indusium uneven at the margin. 
Sit. — On walls, mins, rocks, and other similar situations. 
Hab. — Very generally distributed over the United Kingdom, though there 
are a few districts where it is scarcely found. I believe Berwickshire is one 
of these, nor is it by any means plentiful in Norfolk or Suffolk. 
Geo. — Most parts of Europe, and from New York to Carolina in America. 
7.— ASPLENIUM FONTANUM. 
SMOOTH ROCK SPLEENWORT. 
(Plate 3, fig. 7.) 
Ciia. — Frond bipinnate. Pinnae oblong, blunt, alternate. Pin- 
nules wedge-shaped, cleft, and toothed. Rachis winged. 
Syn. — Asplenium fontanum, Hook., Smith, Bernh. — Aspidium fontanum, 
Willd., Swz , (not of Schkr.) — Polypodium fontanum, Linn., Huds., 
Bolt., With.— Athyrium fontanum, Gray. 
Fig ,—E.B. 2024.— Lob. Ic. 810, 1 .—Bolt. 21 (bad). 
Des. — Root tufted, long, black. Frond lanceolate, bipinnate, 
evergreen, 2 to 6 inches high. Rachis winged throughout. Pinna 
alternate, ovate, oblong, those in the middle of the frond from a 
quarter to half an inch long, formed of six or eight pinnules placed 
alternately. Pinnules short, broadly wedge-shaped, petioled, so 
very deeply cleft at the sides and toothed at the apex, as to become 
nearly pinnate. Seldom more than two sori upon each pinnule, 
which soon extend over the whole surface of it. 
