Corolla c. 5 mm. long, lilac-or bluish-white; lobes c. 2.5 x 1.5 mm., ovate-circular to oblong, minutely pilose towards throat Capsule c. 4 x 3 mm., broadly ovoid to subglobose.
Tufted marsh herb, minutely glandular, stoloniferous or not; stolons, where present, up to 6.5 mm. long.
Calyx 2.5–3.5(5) mm. long; lobes 0.8–1.5 mm. long, triangular-ovate.
Pedicels (5)15–50 mm. long, erect in flower, deflexed in fruit.