Bacopa monnieri

Bacopa monnieri can be distinguished from B. caroliniana and B. rotundifolia by its leaves which have narrow bases and 1 nerve, its flower stalks which exceed the leaves in length (see photo), and 2 bracts which subtend the calyx. Bacopa carolinaiana and Bacopa rotundifolia have leaves with broad or clasping bases and 3 nerves, flower stalks that are shorter than the leaves and no bracts subtending the calyx. Opposite leaves that are longer than wide, narrowest at point of attachment. No hairs. Leaves longer than wide. Prostrate. Flower pale blue to white.

Found in sandy and loamy soils, in wet areas, among dunes, around ponds, streams, and ditches, throughout most of Louisiana and east and south Texas. It ranges from Virginia south to Florida and west to Texas. The Acadian French name for water-hyssop is "pourpier de marais", of literally "marsh purslane" (Holmes 1990). .

Sandy margins of fresh or brackish marshes, streams and ponds.