*Bacopa caroliniana (Walter) Rob.

Branchlets sparsely to densely hairy. Leaves ovate, up to 12 mm long, base cordate. Flowers with 2 inconspicuous bracteoles c. 0.5 mm long under the calyx. Sepals 6–11 mm long. Corolla 9–11 mm long, blue or purple; lobes spreading, rounded. Capsule ovoid 4–5 mm long, styles persistant. Margins of waterways or dams. Blue Mts Introd. from America. Fl. summer