Fischer, E. (2006) Bacopa in Flora of Somalia 3: 276
Plants annual or perennial herbs, usually glabrous, rarely glandular pubescent or villous. Leaves opposite, sessile to subsessile, palmately veined, margins entire to dentate or crenate. Inflorescences terminal, racemose, leafy; bracteoles absent ot present below the calyces. Flowers sessile to pedicellate; calyces 5-lobed almost to the base, upper lobes largest, 2 lateral lobes usually smallest; corollas united, lower portion tubular or campanulate; corolla limbs subrotate, subequally 5-lobed; stamens 4, 2 long and 2 short, included, the lower pair usually longer than the upper pair; anthers with 2 parallel, contiguous thecae; ovaries superior, 2-celled, glabrous; styles straight, filiform; stigmas usually 2-lobed. Fruits capsules, usually loculicidal, rarely septicidal; seeds numerous, coarsely reticular, with longitudinal ridges.
Bacopa includes about 60 species and is pantropical in its distribution. One species is known from Somaliland, Bacopa monnieri.
Plants glabrous, perennial herbs; more or less fleshy. Leaves opposite. Flowers solitary in the lef axils; calyces deeply 5-partite, lobes unequal in width, the posterior widest; corollas campanulat, subequally or unequally 5-lobed; stamens 4, equal; anthers with 2 equal, parallel, contiguous thecae; stigmas subentire. Capsules 4-valved, loculicidal and septicidal; seeds very small, numerous.
Bacopa includes about 100 species. It is tropical and subtropical in its distribution. Only one species is present in Pakistan, Bacopa monnieri.