308 CRYPTOGAMIA— FILICES. Asplenium. 



The variety /3, more deeply crenate and jagged than ordinary, 

 sent from Scotland by Dr. Alston to P. Collinson, and assuredly 

 what Sibbald has figured, was taken by Mr. Hudson for Adian- 

 tuni frapeziforme of Linnaeus. Sibbald's rude engravings may 

 very well excuse this mistake 5 but the latter is a real Adian- 

 tum, copiously branched, well delineated in Sloane, Plukenet 

 and Plumier, a native of the West Indies, not of Europe. The 

 late Bishop of Carlisle has observed AsjAenium marinum growing 

 very luxuriantly in deep fissures of rocks ; while, on the other 

 hand, Mr. Lightfoot found it, in the coves at Weems, just in 

 the dwarf, though jagged, state exhibited by Sibbald. 



4. A. septentrionale . Forked Spleenwort. 



Frond three-cleft; leaflets alternate, linear, jagged at the 

 summit. 



A. septentrionale. Hull. 241. Sw. Syn.Fil, 75. Wilkl Sp. PL 

 v.5.307. FL Br. \\29. Engl Bot.v.\5, t.\0l7. Hook. Scot. 

 jf).2. 155. Lond.t.]62.p.\58. Hoffyn. Germ. v.2. \2. 



Acrostichum septentrionale. Linn. Sp. PL 1524. Bolt. Fil. 12. 

 t. 8. Fl.Dan. t. 60. Dicks. Dr. PL 45. Ehrh. Crypt. 101. 



A. n. 1714. Hall. Hist. V. 3.17. 



Scolopendrium septentrionale. Roth Germ. v. 3. 49. 



Filixsaxatilis Tragi. RaiiSyn.VlQ. Bauh. Hist. v.3.p.2. 747. f. 

 Dalech. Hist. 1226./. 



F. nuda seu saxatilis. Trag. Hist. 537. /-, by mistake named ar. 

 borea. 



Muscus corniculatus. Ger.Em. 1561./. 



Holostium alterum, Filix saxea Tragi, Lob. Ic. 47./. 



In the dry rocky clefts of mountains, chiefly in the north. 



On the mountains of Carnarvonshire, Mr. Lhwyd. In Edinburgh 

 park. T. WdliseL On Ingleborough, Yorkshire. Mr. Tojield. 

 Above Ambleside, Westmoreland. Huds. On Arthur's Seat, 

 and at the Hermitage, by Blackford burn, near Edinburgh, 

 abundantly, in 1782. 



Perennial. June — October. 



Root tufted, somewhat woody, with crooked fibres. Fronds innu- 

 merable, in broad dense patches, erect, three or four inches 

 high, firm, smooth, of a dark dull green, each with a naked 

 wiry stalk, a little dilated upwards, and terminating usually in 

 three, rarely but two, alternate, stalked, narrow, linear, up- 

 right, pointed lecifiets, jagged at the tips. The upper side of 

 each is furrowed 5 the back clothed entirely, first with the long 

 membranous covers, each originating from the disk, within the 

 margin, at each side, and meeting over the midrib; and subse- 

 quently, after the spreading of these membranes, with the two 

 confluent linear masses of crowded, dark-brown, capsules. 



