424 99. FILICES. 



ovate acute cut, segments oblong toothed. Cystea fragilis Sm., 

 N. 155. C. angustata E. B. S. 2/90? . C. cynapifolia (Roth); 

 pinnules obovate cut, segments obovate toothed or retuse at the 

 end. C. fragilis E. B. 1587. 7. C. angustata (Sm.); pinnules 

 lanceolate acute cut, segments lanceolate-oblong cut, teeth acute. 

 N. 156. C. regia Roth. The varieties are intimately connected. 

 Rocks and walls, y. Craven and N. Wales. P. Vll. 



2. C. dentata (Sm.) ; frond lanceolate bipinnate, pinnae ovate 

 or ovate-lanceolate, pinnules cordate-ovate or ovate blunt broad 

 below bluntly toothed or rarely pinnatifid. E. B. 1588 (bad). 

 N. 154. C. fragilis Roth. Clusters more marginal than in the 

 preceding species, ultimately confluent. Pinnae of young fronds 

 reflexed. In well-grown plants the pinnae are suddenly widened 

 to their full extent just above their narrow stalklike base. " Spo- 

 rules verrucate." C. Dickieana (Sim, S. 22.) which has over- 

 lapping pinnae, broad blunt pinnules, and scattered clusters, 

 is a form of this plant found in a damp cave near Aberdeen. 

 Rocks and walls. Breadalbane Mountains and Cumberland. 

 P. VII. E. S. 



[C. alpina (Desv.); frond lanceolate bipinnate, pinnae ovate, 

 pinnules ovate deeply pinnatifid with broadly and shortly linear 

 segments partly cloven and slightly toothed at the end. E. B. 

 163. Fronds very much divided, but compact and close. On a 

 wall at Low Layton, Essex. P. VII.] 



3. C. montana (Link) ; fronds triangular tripinnate, pinnae and 

 pinnules spreading, lobes pinnatifid with linear notched segments. 

 S. 24. Fronds in shape like those of Polypodium calcareum, 

 small, short, very finely divided.. Lower pair of pinnae much the 

 largest ; their lower larger than their upper pinnules. Stipes long, 

 slender. Rhizome creeping extensively, black. Breadalbane and 

 Grampian Mountains. P. VIII. ? S. 



[Onoclea sensibilis is naturalized in one spot near Warrington.] 



7. PSEUDATHYRIUM NeWM. 



1. P. alpestre (Newm.) ; fronds lanceolate bipinnate, pinnae 

 contiguous, pinnules widest at their base acute pinnatifid with 

 serrate lobes. S. 49. Fronds suberect. Much like Athyrium 

 Filix-f(mina. High mountain valleys. P. VII. VIII. S. 



2.? P. flexile (Newm.); fronds linear-lanceolate bipinnate, 

 pinna distant, pinnules narrow at their base obovate bluntish ser- 

 rate. N. ed. 3. 203. Fronds much less divided, narrow, spread- 

 ing horizontally. A doubtful species. Glen Prosen, Forfar- 

 shire. P. VII. VIII. S. 



