on British Ferns. 
Vll 
Genus. — Amesium, Newm. 
Ultimate divisions without a distinct mid-vein : veins of 
ultimate divisions very few, sparingly branched, free at the 
extremities : involucres narrow, linear, frequently facing 
each other as in the preceding genus, but rarely overlap- 
ping. 
Obs . — Roth unites the species of this genus with those of Scolopen- 
drium, all other authors with Asplenium, from which, however, they 
appear to me abundantly distinct. 
* Frond simple. 
Amesium septentrionale. 
Acrosticlium septentrionale, Linn. Sp. PI. 1524 ; Light/. 
FI. Scot. G56 ; Huds. FI. Ang. 450 ; Bolt. Fil. Brit. 
12, t. 8; With. Arr. 764. 
Asplenium septentrionale, Sm. E. F. iv. 308, E. B. 1017 ; 
Newm. N. A. 27, F. 269; Ebook, and Am. 572; Bah. 
41. 
Amesium septentrionale, Newm. F. 10. 
Stipes and frond of equal length, their separation indis- 
tinct ; frond linear, narrow, gradually diminishing into the 
stipes, sometimes forked, apices of divisions bifid ; clusters 
of capsules in two, three, or four long linear series. 
A small and rare fern, in rocky and mountainous pla- 
ces. Somerset, Caernarvon, Cumberland, Northumber- 
land, Edinburgh. 
** Frond linear, pinnate. 
Amesium germanicum. 
1770. Asplenium germanicum, Weiss, PI. Cr. 299; Willd. 
Sp. PI. v. 330; Hoffm. Deutschl. FI. ii. 13; Ehrh. 
Crypt. 43; Presl. Tent. Pteridog. 108; Newm. F. 265; 
Bah. 414. 
1779. Asplenium Breynii, Betz, Ohs. Bot. fuse. i. 32; Sw. 
Syn. Fil, 85. 
