44 
FERNS. 
[. Asplenium . 
1 . — ASPLENIUM SEPTENTRIONALE. 
FORKED SPLEENWORT. 
(Plate 4, fig. 1 .) 
Cha. — F rond simply partite. Segments linear, sharply toothed at 
their extremity. 
Syn. — Asplenium septentrionale, Swz., Willd., Hull, Hoff/n., Hook., Smith, 
Galp., Gray. — Acrostichum septentrionale, Linn., Bolt., Dicks., Ehrh., 
With., Huds., Light/. — Scolopendrium septentrionale, Roth. 
Fig .—E.B. 1017 .—Flo. Dan. GO.— Bolt. 8.— Flo. Lon. 162.— Ger. 1561.— 
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 spinous teeth. Sori one on each side of the 
segment, nearly longitudinal, concealed at first by a white indusium, 
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. — On the rocky clefts of mountains, chiefly in the north. Not in Ireland. 
II aii. — Eng. : In situations probably exceeding 1000 feet in height in Cum- 
berland, where it occurs sparingly on rocks, between the vale of Newlands and 
Borrodale. — Wal. : Craig Ddw. (a mile above Llanberris Church), Caern., Mr. 
C. C. Balington. Snowdon, (rare), Mr. J. E. Bowman. Llyn-y-cwm, N. Wales, 
Mr. W. Wilson. — Sco. : Arthur’s Seat, Edinburgh, (above the rail-road), 
Jedburg, &c., Mr. II. C. Watson. Blackford Hill, Edin., Mr. W. Brand. 
Geo. — Holland, Switzerland. Not unfrequent throughout Europe. 
2.— ASPLENIUM ALTERNIFOLIUM. 
ALTERNATE-LEAVED SPLEENWORT. 
(Plate 4, fig. 2.) 
Cha. — Frond pinnate. Pinnae alternate, wedge-shaped, notched. 
Syn. — Asplenium alternifolium, Smith, Hook., Dicks,, With., Galp., Jacq. 
— Asplenium germanicum, Willd., Hoffm. , Ehrh., Lam., U r eis., Gray. 
— Phyllitis heterophylla, Moench. — Scolopendrium alternifolium, Roth. 
— Asplenium Breynii, Retz. 
Fig. — E. Ii. 2258. — lacy. Misc. t. 5. /’. 2. — Brcyn. Cent. 1 /. 91. — Newm. 
p.71. ft ft. 
