X Edward Newman 



** Frond deltoid. 

 ASPLENIUM AdIANTUM-NIGRUM. 



Asplenium Adiantum-nigrum, Linn. Sp. PL 1541 ; Light/. 



Fl. Scot. G66 ; Huds. Fl. Aug. 454 ; Bolt. Fil. Brit. 30, 



t. 17, 3 ; With. Arr. 770 ; S7n. E. F. iv. 310, E. B. 



1950 ; Mack. Fl. Hih. 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 pinnae always longest, all the pinnae 

 pinnate ; clusters of capsules linear, approximate to mid-rib. 



*** Frond lanceolate. 



Asplenium lanceolatum. 



Asplenium lanceolatum, Huds. Fl. Ang. 454 ; With. Arr. 

 770 ; Sm. E. F. iv. 311, E. B. 240; Newm. N. A. 27, 

 F. 249 ; Hook, and Am. 573 ; Bab. 414. 

 " ? Asplenium obtusatum, Guss." Bah. MSS. 



Stipes shorter than frond ; frond semi-erect, lanceolate, 

 I)innate ; lowest pair of pinnse shorter than the second paii', 

 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, Roth. 



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 rhizoma 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. 



