| − | Plynlimon (752 m)is a mountain in [[Ceredigion]], [[Wales]], and the source of the [[River Severn]] and the [[River Wye]]. The name, meaning 'Hill of the lemon (trees)', and recorded as early as the 6th century AD, is a potent reminder of the impact of climatic variation over the centuries | + | Plynlimon (752 m) is a mountain in [[Ceredigion]], [[Wales]], and the source of the [[River Severn]] and the [[River Wye]]. The name, meaning 'Hill of the lemon (trees)', and recorded as early as the 6th century AD, is a potent reminder of the impact of climatic variation over the centuries |