Epilobium anagallidifolium Alpine Willowherb R DDD N
We found this to be fairly common in the boggy areas and flushes once we were above 900 metres but didn't notice it in the flushes on the side of Beinn Ghlas. The leaves are quite distinctive being ovate with a short petiole (leaf stalk). The plants are low in the grass or bog vegetation and don't seem to reach more than about 10 centimetres in height.
E. anagallidifolium is common in the northern Scottish hills and can be found in the northern pennines west of Teesdale but otherwise is not found in most of England, Wales or Ireland.