FLORA OF ARROCHAR MOUNTAINS. 107 
CAMPANULA ROTUNDIFOLIA, L. 
Common on banks, pastures, and rocks. Ascending to 3,000 
feet on Ben Ime. 
VACCINIUM VITIS-ID#A, L. 
The cowberry is fairly abundant on the hills, but not common 
at low levels. From about 1,500 feet upwards it becomes a 
feature of the rock-flora, usually forming considerable clumps on 
the drier ledges. It nowhere forms great masses on these 
mountains, however, extending over a wide area, as is the case on 
other hills in the Scottish highlands. This species extends 
upwards to 2,800 feet on Ben Narnain, and almost to the same 
altitude on Ben Arthur and on Crois, being one of the summit 
plants on this last-mentioned hill. 
VACCINIUM ULIGINOSUM, L. 
Alpine.—Plentiful on all the mountains except Crois, where it 
has not yet been observed. Although its specific name indicates 
that this is a marsh plant, it is mostly found on rocks in the 
Arrochar district. It grows, however, in the swamp at the source 
of Allt-a-Bhalachain on Ben Arthur. It nowhere descends to a 
low level, the lowest point observed being 1,900 feet on Ben 
Narnain, and the same on Ben Vorlich. It ascends to 2,600 feet 
on Ben Narnain. 
VACCINIUM MyrtTILuus, L. 
The common bilberry is plentiful all over the district, and 
ascends to the summit of all the mountains, hence attaining over 
3,300 feet on Ben Ime. 
CALLUNA VULGARIS, Salisb. 
The heather occurs pretty generally throughout the district, but 
does not form true heather-moors except on Cruach-Tarbet, and 
on the eastern side of Ben Vorlich. These moors do not attain 
an elevation of more than 1,000 feet, but the species occurs up to 
2,000 feet on Ben Arthur and Ben Narnain. 
ERICA TETRALIX, L. 
Common on the moors up to about 1,000 feet, but not covering 
large areas except on Cruach-Tarbet. 
