Il4 FLORA OF ARROCHAR MOUNTAINS. 
SaLix Caprea, L. 
Woods on Loch Lomond side. Not ascending. 
SALIX CINEREA, L. 
Very common. Ascending to 2,000 feet on Ben Arthur. 
SALIX AURITA, L. 
Frequent on the hills in moist parts. Ascends to 1,000 feet on 
Ben Arthur. 
SALIx (ARBUSCULA, L. ?) 
Two small shrubs were found by Mr. M‘Lean and myself, of 
similar habit, with dark shining foliage, one on the banks of the 
Allt-a-Bhalachain at 1,800 feet altitude, the other on the Allt- 
Sugach at 1,500 feet. Both plants were females, and in fruit, the 
capsules being similar in the two cases, but there are slight 
differences in the form of the leaves. They appear to approach 
S. arbuscula in character, and may be referable to that species, or 
perhaps to hybrids with S. nigricans or S. phyllictfolia. 
SALIX HERBACEA, L. 
Alpine.—A characteristic plant of the mountain tops, where it 
grows in some abundance on the bare ground, with branches 
buried in the soil. It occurs on all the summits except Ben Ime, 
on which hill it ascends to over 3,000 feet. Its lower limit of 
altitude appears to be about 2,400 feet, but one specimen was 
found on Ben Narnain at 1,500 feet. This, however, is altogether 
exceptional. A form with large leaves occurs on Ben Narnain at 
2,500 feet, which Mr. Ewing informs me is believed to be a 
hybrid with S. AZyrsinites. 
POPULUS TREMULA, L. 
Frequent in the woods on Loch Lomond side. Ascends to 
1,000 feet on Ben Vorlich. 
EMPETRUM NIGRUM, L. 
Alpine.-—Common from about 1,100 feet upwards. Ascending 
to the summits of Ben Narnain and Crois, thus attaining over 
3,000 feet on the former. This shrub is characteristic of peat 
moors, especially on the drier parts. 
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