Aspidium.] CRVPTOGAMIA — FILICES. 383 



sometimes deeply serrated and even pinnatifid or laciniated, as it has 

 been found in Ireland and Wales, when it becomes the P. Cambriann, L. 



2. P. Phegopteris, L. (^pale Mountain Pohipody); fronds bi- 

 pinnatifid the two lowermost pinnae standing forward, their seg- 

 ments linear-lanceolate obtuse entire ciliated, the lowermost ones 

 adnato-decurrent, veins hairy, sori marginal. E. Hot. t. 12224. 



Shaded rocky places, in mountainous countries. 



3. P. Dryopteris, L. {tender three-branched Polypody); fronds 

 ternate bipinnate, divisions spreading and deflexed, the seg- 

 ments obtuse subcrenated, sori marginal, root-stock filiform. E. 

 Bot. ^. 61G. 



Dry stonj' places, in mountainous countries. Common in Scotland. 



4. P. calcdreum, Sm. (rigid three-branched Polypody); " frond 

 3-branched, branches doubly pinnate erect rather rigid, seg- 

 ments obtuse somewhat crenated, masses of capsules crowded 

 finally confluent." E. Bot. t. 1525. 



Matlock batiis, and other parts of Derb^'shire, in broken limestone 

 ground. Cheddar Cliffs. Ingleborough, &c., 3Ir Wilson. — This, which 

 I possess from Sir J. E. Smith, is distinguished from the former by its 

 thicker and more rigid texture ; its more pectinated subdivision, and by 

 the minute pubescence covering the rachis and midrib of the pinnae. 



3. WooDSiA. Br. Woodsia. 



1. W. Ilvensis, Br. (oblong Woodsia); fronds lanceolate pin- 

 nate, pinnae deeply pinnatifid with many oblong segments chaffy 

 beneath and on the rachis and stipes. Hook, iii E. Bot. Siqjpl. 

 t. 2616. — Acrostichum, Linn. 



INIountains, very rare. Wales. Near Caldron spout, Teesdale. Clova 

 mountains, Mr Wilson. — Plant small, 2 — 3 inches high. 



2. W. hyperborea, Br. (rounded-leaved Woodsia); fronds lan- 

 ceolate pinnate, pinnae ovato-cordate inciso-pinnatifid hairy be- 

 neath, sori solitary at length confluent. Hook. Scot. ii. p. 153. 

 E. El. V. iv. p. 323. — Polypodium hyperboreum, Sw. — E. Bot. 

 t. 2023. 



On Snowdon and Ben Lawers. Glen of the Dole, Clova, Mr Brand, 

 Mr Watson. — About the same size as the last, but quite distinct. 



4. Aspidium. Stv. Shield-fern. 



* Involucre orbicidar, fixed by ike centre, hence peltate. 



(Aspidium, Br.) 



1. A. Lonchitis, Sw. (rough alpine Shield-fern); fronds linear- 

 lanceolate pinnate, pinnae lanceolato-falcate acute ciliato-serrate, 

 the upper base acutely auricled the lower one cuneate, superior 

 pinnae bearing the fructifications, stipes chafiY. Polypod.y L. — 

 E. Bot. t. 797. 



Shady clefts of rocks and under stones, on the high mountains of 

 Wales and Scotland. — A verv handsome northern Fern. 



