Cotton Grass West Perthshire, 26 August 2010 at 07:56 hours. The area near lochan nan cat, at the north-west foot of Ben Lawers was very boggy and my socks were already wet from treading on sphagnum moss and numerous puddles. Cotton grass is a good indication that the area is boggy as indicated here. Camera details: EF17-40mm f/4L USM, 0.3 sec at f / 19.