124 FLORA OF ARROCHAR MOUNTAINS. 
NEPHRODIUM SPINULOSUM, Desyv. 
Recorded in the ‘Clydesdale Flora” from the “banks of 
Loch Lomond near Tarbet.” 
NEPHRODIUM DILATATUM, Desv. 
Of this excessively variable species many forms are found 
throughout the district. It is very common on the hills, one 
dwarf variety being specially abundant among the rocks at high 
altitudes. I can make nothing of the descriptions given of the 
different forms, none of which seem to correspond with the plants 
one meets with on the mountains. ‘The species extends to 3,300 
feet on Ben Ime. 
NEPHRODIUM OREOPTERIS, Desv. 
This is one of the most abundant ferns in mountainous districts, 
especially near streams. It extends upwards to a high altitude, 
becoming, however, more restricted in numbers and smaller in 
size in the higher and more exposed parts. In crevices of the. 
rocks near the tops of the mountains it becomes very small, one 
such dwarf specimen being seen on the extreme summit of Ben 
Ime, near the cairn—altitude, 3,318 feet. 
POLYPODIUM VULGARE, L. 
Tree trunks, walls and rock-ledges. Ascending to 2,700 feet on 
Ben Vane. 
PoLYPODIUM PHEGOPTERIS, L. 
Very common in woods and crevices of rocks. Ascending to 
3,200 feet on Ben Ime. 
PoLtypopiIuM DryoprTeris, L, 
Frequent in shady parts of the woods, and recesses of rocks. 
Ascends to 2,700 feet on Ben Ime. 
POLYPODIUM ALPESTRE, Hoppe. 
Alpine, and apparently rare. Recorded from Ben Vorlich by 
Mr. R. Mackay in Brit. Ass. Handbook. Also found on Ben 
Narnain by Mr. M‘Lean and myself at 2,800 feet altitude, these 
being the only records from these hills. 
