Plant - for ID

Plant - for ID

Observation - Plant - for ID - UK and Ireland. Description: Seen it before but can't place it. Deep purple, but green core; between 10cm and 22cm tall, growing in drying out marshland and slight aroma of mint when crushed.

Seen it before but can't place it. Deep purple, but green core; between 10cm and 22cm tall, growing in drying out marshland and slight aroma of mint when crushed.