FLORA OF ARROCHAR MOUNTAINS. 81 
including that portion of the shore of Loch Long lying between 
the mouth of Glen Croe and Arrochar pier. On the west—the 
watershed running along the ridge of Ben Ime (and including the 
peak), dividing the streams draining to Loch Long from those 
draining towards Loch Fyne, and extending northward to the 
head of Loch Sloy, and the northern slope of Ben Vorlich. On 
the north—the base of Ben Vorlich eastward to Ardlui; the 
eastern boundary being formed by Loch Lomond, from Ardlui to 
Tarbet pier. I have not included any of the hills lying on the 
south side of the Tarbet valley, between Loch Lomond and Loch 
Long, but as these hills do not attain a high altitude, and 
nowhere afford a truly alpine flora, their exclusion does not 
seriously affect the purpose of this paper. It is with more 
hesitation that I have decided to leave out of account the interest- 
ing hills to the south and west .of Glen Croe. By so doing 
several very interesting and important records of the rarer alpine 
species have to be passed by ; but, as the information with regard 
to these hills is much less complete than is the case with the area 
included, I have thought it well to postpone dealing with these 
meantime. I might suggest to some of the members of the 
Botanical Section, whose knowledge of these localities is more 
extensive than my own, that a paper on similar lines to the 
present, dealing with the now popular “ Argyll’s Bowling Green” 
and the specially interesting mountain of Beinn-an-Lochain, would 
be a valuable one. 
The mountains included within the boundaries indicated are 
six in number, and lie in two parallel series running south-west 
and north-east. The three peaks included in the more southerly 
ridge are Ben Arthur, Ben Narnain, and Crois ; those in the more 
northerly series are Ben Ime, Ben Vane, and Ben Vorlich. 
Besides these higher peaks there is the low hill of Cruach-Tarbet, 
locally known as “ The Cruach,” which occupies the south-eastern 
corner of the district, forming the northern side of the Tarbet 
valley, and divided from the larger mountain masses by the two 
principal glens of the area. These glens are (1) Glen Loin, which 
forms the upper portion of the Loch Long basin, and extends for 
about two and a half miles in a north-easterly direction from the 
head of the loch between Crois and the Cruach; and (2) the 
deep valley of the Inveruglas, which in its lower part separates 
F 
