Marsh with sphagnum, open place amongst reeds and other herbs.
Notes:
Erect herbs to about 50cm high, purplish, at least in upper parts. Leaflets prominently veined beneath. Calyx ribbed, accrescent. Corolla about 1.7cm long to apex of straight upper lip, this folded and reddish-purple; lower lip 6-7mm long, curving forward, rosy-magenta, 3-lobed. A small patch.