Revista Soc. Cub. Bot. 13: 61. 1957.
Perennials. Stems prostrate, 8–14 cm, hairy. Leaves hairy; blade base ± truncate, margins entire, apex rounded. Pedicels 6–10 mm. Flowers: sepals 5, ovate to oblong, calyx bilaterally symmetric; corolla white with white throat, 2–5 mm; stamens 2–4, equal.
Phenology: Flowering Jun–Sep.
Habitat: Marshy areas, alluvial deposits along streams, wet ditches, muddy shores and banks.
Elevation: 0–200 m.
Fla., Ga., Md., N.C., S.C., Va.
Bacopa innominata differs from B. rotundifolia in having corollas entirely white; B. rotundifolia has corollas with yellow throats.