Common Sorrel (Rumex acetosa)

Common Sorrel (Rumex acetosa)

Observation - Common Sorrel (Rumex acetosa). Description: I think both the red leaves in the centre of the photo and the green ones at the lower left are both Common Sorrel (Rumex acetosa), based on the shape of the leaf. Any suggestions why they should be of such markedly different colours?

I think both the red leaves in the centre of the photo and the green ones at the lower left are both Common Sorrel (Rumex acetosa), based on the shape of the leaf. Any suggestions why they should be of such markedly different colours?