208 89. POLYPODIACE^E. 



apex ; pinnules convex, deeply pimiatifid, terminating in 3 equal 

 teeth, giving the pinnule an obtuse appearance. Indusia fringed 

 with glands. 



Frequent. In Bute and Arran ; glen at Colintraive. 



Var. pumila, Moore. A dwarf plant with subdeltoid or ovato- 

 deltoid fronds, bipinnate, pinnules blunt, slightly glandular 

 beneath ; scales pale but often two-coloured. 



Colintraive ; Bute and Arran. 



Var. dumetorum, Sm. Frond 12 18 in. long, oblong-ovate or 

 elongate-triangular ; glandular underneath especially on the veins; 

 lowest pinnae pointing forward ; pinnules oblong-ovate, sometimes 

 convex, with broad incurved coarse teeth, tipped with a bristle. 

 Scales few except at the base of the stipes, pale brown, centre 

 scarcely darker in colour, edge often fringed with small points. 

 Sori large, generally covering the under surface of the frond. 

 Indusia fringed with stalked glands. 



Cadder wilderness ; Colintraive glen ; Bute and Arran, Thomas Moore. 



4. CYSTOPTERIS. Bladder-fern. 



C. FRA'GILIS, Bernh. Brittle Bladder-fern. Rhizome shortly 

 creeping. Fronds tufted, 8 12 in. high, lanceolate, bipinnate ; 

 pinnules slightly stalked, oblong-ovate, cuneate at the base, 

 pinnatifid or deeply serrate ; segments toothed ; rachis winged. 

 Sori distant from the margin. Spores covered with sharp teeth. 



Frequent. Clef ts of rocks and walls. (B) P. 7. Barncluith garden, Hamilton ; 

 Cadzow; Falls of Clyde; Campsic glen: Calderwood and Cambuslang glens; 

 banks of the Kittoch burn; from Gourock to Arran. 



Var. dentata. Scarcely bipinnate; pinnules broad below, 

 sessile, ovate or oblong, bluntly toothed. Sori near the margin. 

 Spores covered with warts. 



Rare. "Tarbert, by Loch Lomond," H. & A. Hills above T Rashfield on the 

 Holy Loch. P. 7. 



5. ASPL^NIUM. Spleenwort. 



ATHYBIUM. Sori oblong, curved. Indusium fringed. 



1. A. FILIX-FGE'MINA, Bernh. Lady-fern. Rhizome erect. 

 Fronds growing in a circular tuft, 1 3 ft. high, lanceolate, bipin- 

 nate ; pinnse linear-lanceolate; pinnules distinct, oblong-lanceolate, 

 deeply pinnatifid or cleft ; segments 2 or 3-toothed ; secondary 

 rachis scarcely winged. Plant soft to the touch, light green, and 

 tender, very liable to sport. Of varieties there are 32 described 

 in "Nature -Printed Ferns," besides 33 of the abnormal series. 



Very common. Woods and damp shady places most luxuriant ; attaining a 

 great size in Cadder wilderness, being upwards of 5 feet high ; when exposed, 

 becoming more stinted in growth. (B) P. 6 7. 



