Labiate?

Labiate?

Observation - Labiate? - Global. Description: Not the Mimulus. Plant growing in exposed mud at the edge of a seasonably variable pond in pasture; pond adjacent to West Coast Main Line. Stems apparently square; inflorescences apparently verticillasters. Would appear to be a labiate, but I can't place

Not the Mimulus. Plant growing in exposed mud at the edge of a seasonably variable pond in pasture; pond adjacent to West Coast Main Line. Stems apparently square; inflorescences apparently verticillasters. Would appear to be a labiate, but I can't place it.