210 89. POLYPODIACEJE. 



3. A. RUTA-MURARIA, L. Wall-Rue, Tentwort. Fronds 

 densely tufted, 2 4 in. high, bipinnate below, of but few deltoid 

 segments, toothed at the apex, with no distinct mid- vein. Sori 

 few, linear. Indusium wavy or crenulate on the margin. Plant 

 harsh, smooth, dull green above, purple at the base of the stipes. 



Frequent. Fissures of rocks and walls. (B) P. 610. " Calderwood," Ure. 

 Old bridge at Cathcart, also on the wall of the Churchyard; Bowling; Dumbar- 

 ton rock; from Gourock to Arran. 



* * Leaves pinnate, witli a mid-vein. 



4. A. TRICHOMANES, L. Maiden-Hair Spleenwort. Stipes 

 and rachis black, 3 10 in. long. Fronds pinnate ; pinnae orbicular 

 or broadly oblong, more or less toothed. Sori oblong-linear, often 

 confluent when old. Plant of a thickish texture, deep green in 

 the shade. 



Common. Rocks and walls. (B) P. 5 11. Falls of Clyde; Calderwood and 

 Cambuslang glens; banks of the Kittoch burn; Blantyre Priory; Cathcart; 

 Bowling ; Dumbarton rock ; from Gourock to Arran. 



5. A. VIRIDE, Huds. Green Spleenwort. Stipes dark brown 

 at the base ; rachis green. Fronds 3 10 in. long, pinnate ; pinnae 

 roundish-ovate, cuneate at the base ; crenate. Sori principally on 

 the upper portion of the frond. Indusium narrow, crenate on 

 the margin. Plant delicate, pale green. 



Frequent. Crevices of moist rocks in mountainous districts. (H) P. 6 9. 

 Falls of Clyde; Puck's glen above Rashfield, on the Holy Loch; Glen Messen; 

 glen at Dunoon, and in Arran. 



6. A. MARINUM, L. Sea Spleenwort. Fronds tufted, 3 12 in. 

 long, pinnate; pinnae oblong or oblong-ovate, oblique, obtuse, 

 crenate, the lowest pinnae with a lobe on the anterior base, more 

 or less developed, stalked or sessile. Rachis winged. Sori linear. 

 Indusium entire. 



Not common. Maritime rocks and caves. (A) P. 6 10. Wemyss bay ; Bute ; 

 both islands of Cumbrae and Arran. 



6. SCOLOP^NDRIUM. Hart? s-tongue. 



S. VULGARE, Sym. Common Hart' 's-tongue Fern. Fronds 

 tufted. Stipes from ^ the length of the frond to ^, clothed with 

 tawny scales, continued along the midrib on the under side. 

 Fronds broadly linear, narrow lanceolate or oblong, often forked 

 at the apex, but generally acute, heart-shaped at the base. Sori 

 linear. Indusium double, opening in the middle. 



Frequent. Shady banks and under rocks. (B) P. 7 8. Falls of Clyde; Bam- 

 cluith, Hamilton; Calderwood glen; bridge at Crossbasket; Cambuslang glen; 

 glens around the Holy Loch ; from Gourock to Arran. 



7. C^TEKACH. Ceterach. 



C. OFFICINARUM, Willd. Common Ceterach. Scale-fern. 

 Fronds tufted, spreading, 2 4 in. high, pinnatifid ; segments 



