X 
Edward Newman 
** Frond deltoid. 
Asplenium Adiantum-nigrum. 
Asplenium Adiantum-nigrum, Linn. Sp. PI. 1541 ; Light/. 
FI. Scot. 606 ; Huds. FI. Ang. 454 ; Bolt. Fil. Brit. 30, 
t. 17, 3; With. Arr. 770; Sm. E. F. iv. 310, E. B. 
1950 ; Mack. FI. Hib. 342; Newm. N. A. 27, F. 255; 
Hook, and Am. 573 ; Bah. 414. 
Stipes longer than frond ; frond elongate, deltoid, pin- 
nate ; lowest pair of pin me always longest, all the pinme 
pinnate ; clusters of capsules linear, approximate to mid-rib. 
*** Frond lanceolate. 
Asplenium lanceolatum. 
Asplenium lanceolatum, Huds. FI. Ang. 454 ; With. Arr. 
770 ; Sm. E. F. iv. 311, E. B. 240; Newm. N. A. 27, 
F. 249 ; Hook, and Am. 573 ; Bah. 414. 
“ ? Asplenium obtusatum, Guss.” Bah. MSS. 
Stipes shorter than frond ; frond semi-erect, lanceolate, 
pinnate ; lowest pair of pinnae shorter than the second pair, 
all pinnate or pinnatifid ; clusters of capsules at first linear, 
afterwards circular, distant from midrib. 
Local, and mostly maritime ; chiefly upon stone walls. 
Caernarvonshire, Cornwall, Devon, Gloucestershire, Kent, 
Merionethsire, Sussex. 
Genus. — Athyrium, Both. 
Ultimate divisions generally distinct and leaf-like, each 
with a distinct mid-vein : lateral veins always branched : 
involucre crescent-shaped, its free margin split into capil- 
lary segments. The rliizoma or cormus is long-enduring, 
suberect, and often of very large size ; it sometimes in- 
creases laterally, but generally from the centre, and occa- 
sionally, in very old individuals, it becomes erect and 
trunk-like, as in the tree-ferns. There is probably some 
difference between the species in this respect, but the sub- 
ject has not obtained the attention of botanists. 
