■14 
FERNS. 
[Asplenium. 
1 . — ASPLENIUM SEPTENTRIONALE. 
FORKED SPLEENWOUT. 
(Plate IV, fig. I.) 
Ciia. — F rond simply partite. Segments linear, sharply toothed 
at their extremity. 
Syn. — Asplenium septentrionale, Swz., JVilld., Hull, Hoffm., Hook., Smith, 
Gulp., Gray. — Acrostichum septentrionale, Linn., Bolt., Dicks., Elirh., 
With., Huds., Light/. — Scolopendrimn septentrionale, Roth. 
Fig. — E. B. 1017. — Flo. Dan. GO. — Bolt. 8. — Flo. Lon. 162. — Ger. 15G1. — 
Newm. p. 73. 
Des. — Fronds very numerous, upright when young, drooping 
afterwards, rigid, 1 to 3 inches high, cleft near the top into two or 
three linear sharp-pointed alternate segments, which in proportion to 
their size are furnished at or near their extremity with from one to 
three acute, but not spiuous teeth. Sori one on each side of the 
segment, nearly longitudinal, concealed at first by a white radusium, 
attached at the outer edge ; afterwards the swelling sori throw back 
the indusia, covering the whole of the segment, and finally curving 
and contorting it in a curious manner. 
Mr. H. C. Watson writes thus : “ Although quite a northern Fern, I observed 
the young fronds destroyed by a frost of 25 degrees Fahr., in April 1835. The 
plant had been under a glass in a cold frame during winter, where the tem- 
perature inside had risen a few degrees higher than outside by day, and had 
never been allowed to sink to the freezing point at night, in consequence of a 
thick covering of mats.” 
Sit. — O n the rocky clefts of mountains, chiefly in the north. Not in Ireland. 
Hab. — Eng. : In situations probably exceeding 1000 feet in height in Cum- 
berland, where it occurs sparingly on rocks, between the vale of Newlands and 
Borrowdale. — Wales : Craig Ddw (a mile above Llanberris Church), Caern., Mr. 
C. C. Babington. Snowdou, (rare), Mr. J. E. Bowman. Llyn-y-cwm, N. Wales, 
Mr. W. Wilson. — Scot.: Arthur’s Seat, Edinburgh (above the railroad), Jedburgh, 
&c., Mr. H. C. tl'atson. Blackford Hill, Edin., Mr. W. Brand. 
Geo. — Holland, Switzerland. Not uufrequent throughout Europe. 
2 . — ASPLEN I UM ALTERN I FOL 1 U M . 
alternate-leaved spleenivo rt . 
(Plate IV, fig. 2.) 
Cha. — F rond pinnate. Pinna; alternate, wedge-shaped, notched. 
Syn. — Asplenium alternifolium, Smith, Hook., Dicks., With., Gulp., Jacq., 
— Asplenium germanicum, Willd., Hoffm., Ehrh., Lam., Weis., Gray. 
— Phvllitis heterophylla, Moench. — Scolopcndrium alternifolium, Roth. 
— Asplenium Brcynii, Retz. 
Fig. — E. B. 2258. — Jacg. Misc. t. ft. f. 2. — Breyn. Cent. 1 t. 91. — Newm. 
)>■ 71 . ft ft. 
