30 PHANEROGAMS AND FERNS OF SOUTH ARDGOIL. 
lonchitidoides, occasionally, at 100 feet in Allt Lounin, at 250 
feet in Garbh Allt, at 400 feet in Allt Onich, and occasional 
in other allts. 
Mountain Fern (Aspidium Oreopteris, Sw.) — After the 
bracken this is probably the commonest fern, and is more 
widely distributed, both horizontally and vertically; its 
essential is shade. It is most strongly developed and abundant 
in the hazel and alder wood near Lochgoilhead; it covers 
patches on the shady slopes of the hillsides ; and is plentiful 
among the bracken. About 1600 feet is the observed 
limit. 
Male Fern (Aspidium Jilix-mas, Sw.) — Very common, 
especially at low levels, but frequently occurring on sheltered 
banks and among rocks up to 1900 feet. 
Broad Shield-fern (Aspidiwm dilatatum, Willd.)—Frequent 
but not occurring anywhere in numbers; showing various 
forms not yet determined, the mountain form occurring up to 
1500 feet. 
Lady Fern (Asplenium Filix-feemina, Bernh.)—Common at 
low levels, and occasional in sheltered places among rocks up 
to 1750 feet. 
Maiden-hair Spleenwort (Asplenium Trichomanes, Linn.)— 
Not common at low levels, but covering the walls of the bridge 
over the Goil; common at moderate levels in rocky hollows 
and sheltered rock faces up to 1750 feet, and well distributed 
all over the district. 
Green Spleenwort (Asplenium viride, Huds.)—Common on 
rocks in the allts from 500 feet upwards; very frequent on 
wet rock hollows, from 1000 to 2100 feet; at mid levels from 
1000 to 1500 feet. The two last named are frequently found 
together or near each other. 
Black Spleenwort (Asplenium Adiantum-nigrum, Linn.)— 
Occasional on rocks at various parts of the district; near 
sea-level at the Dog Rock; up to 1100 feet on Clach Bheinn, 
and 1000 feet on the Steeple. 
Wall-rue (Asplenium Ruta-muraria, Linn.)—Occasional on 
shaded rock faces and walls, chiefly at low levels, and rarely 
ascending, highest noticed being at 1200 feet on the 
Steeple. 
Tongue Fern (Scolopendrium vulgare, Sm.)—Very rare, only 
at one place in a stream gorge near the Dog Rock. 
