ACOTYLEDONS. FiLiCEs. Asplcnium. 155 



ft Involucres lateral. 



9. A. Filixfoemina, fronds bipinnate, pinnules oblongo-lanceo- 

 late inciso-serrate, serratures bi- or tridentate acute, sori ob- 

 long straight. E. B. t. 1459. Polypodium Filix fcemina, 

 Light f. p. 673. 



HAB. Woods and shady places. 



10. A. fragile, fronds bipinnate, pinnules oblong obtuse inciso- 

 serrated, serratures obtuse denticulated, their rachis winged. 

 Willd. Cyatheafragilis, E.B. t. 1587. Poly podium fragile, 

 Light/, p. 677. 



HAB. Rocks and stony places, abundant. 



11. A. dentaturri) fronds pinnate, pinnules ovato-oblong pinna- 

 tifid, the segments oblong obtuse toothed. Willd. Cyathea 

 dentata, E. B. t. 1588. 



HAB. Rocks in the Highlands, Dickson. Ben Lawers, G. Don. 



12. A.reg'mm, " frond lanceolate bipinnate pinnatifid, its seg- 

 ments lobed obtuse and beardless, stalk slightly winged, invo- 

 lucre lacerated and turned to one side," Sm. E. 13 . t. 163 

 (Cyathea incisa). 



HAB. Ben Lawers, Maugh. 



This species even Sir James Smith, who first described it in E. Bot., 

 seems disposed to think may be a var. of 4. fragile. 



5. ASPLENIUM. 



Sori linear, transverse, scattered. Involucres arising from the 

 lateral veins, and opening towards the central nerve or rib. 



1. A. septentrionale, fronds trifid on a long stipes, segments li- 

 near acutely jagged or generally tridentate near the point. 

 Acrostic/mm septe?itrionale 9 Lightf. p. 657. E. B. t. 1017. 



HAB. Clefts of rocks on Arthur's Seat, Edinb., Light/. Rock of 

 Stenton, near Dunkeld, Mr. Arnott. 



2. A. marinum y fronds pinnate, pinnules oblong obtuse inciso- 

 serrate, the superior base rounded and subauriculated, the 

 lower one truncated. E. B. t. 392. Light/, p. 664. 



HAB. Rocks by the sea-side, especially on the western coast, in many 

 places. 



3. A. Trichomanis, fronds pinnate, pinnules roundish oblong 

 obtuse crenate, truncate -cuneate at the base (stipes black). 

 Lightf. p. 662. E. B. t. 576. 



HAB. Rocks and walls, common. 



4. A.viride, fronds pinnated, pinnules roundish ovate obiusefy 

 serrate cuneate at the base (stipes green). Light/', p. 063. 

 E. B. t. 2257. 



HAB. Crevices of the rocks in the mountainous parts of the High- 

 lands. Creg-a-chnocaen, between Ross-shire and Sutherlanc 

 Lightf. Ben Lomond and Ben Nevis, Mr. Murray. Ben Lawers 

 Mr. Winch. Appin, Capt. Carmichael. 



