• Scientific Name: Bacopa monnieri (L.) Pennell
• Ref: Nat. Pflanzenfam. IV; 3b:77. 1891
• Synonyms:
  • Anisocalyx limnanthiflorus Hance
  • Bacopa monnieri (L.) Hayata & Matsum.
  • B. monnieri (L.) Wettst.
  • Bramia indica Lam.
  • B. monniera (L.) Drake
  • B. monnieri (L.) Pennell
  • Calytriplex obovata Ruiz & Pav.
  • Capraria monnieri (L.) Roxb.
  • Gratiola monnieri (L.) L.
  • G. portulacacea Weinm.
  • G. tetrandra Stokes
  • Habershamia cuneifolia (Michaux) Raf.
  • Herpestis africana Steud.
  • H. brownei Steud.
  • H. calytriplex Steud.
  • H. cuneifolia Pursh
  • H. monnieri (L.) Rothm.
  • H. monnieria (L.) Humb.
  • H. monnieria (L.) Kunth
  • H. moranensis Kunth
  • H. pedunculosa Steud.
  • H. spathulata Bl.
  • Hydrotrida beccabunga Willd.
  • Limosella calycina Forsk.
  • Lysimachia monnieri L.
  • Monniera africana Persoon
  • M. brownei Persoon
  • M. cuneifolia Michx.
  • M. monniera (L.) Britton
  • M. pedunculosa Persoon
• English Common Name: waterhyssop, brahmi, thyme-leafed gratiola, water hyssop, herb of grace, Indian pennywort
• Chinese Common Name: 假马齿苋 jiǎ mǎchǐ∙xiàn, 过长沙 guò∙chángshā
• Japanese Common Name: オトメアゼナ [乙女畦菜] otomeazena
• Family: Scrophulariaceae
• Genus: Bacopa
• Distribution: By water, wet places, sandy beaches; below 1100 m. Fujian, Guangdong, Guangxi, Hainan, Taiwan, Yunnan [widespread in tropics and subtropics].
• Photo: 09/12/2019, Hangzhou Botanical Garden, Zhejiang

Stems creeping, rooting at nodes, succulent, glabrous. Leaves sessile, oblong-oblanceolate, 0.8-2 cm X 3-6 mm, margin entire or rarely dentate, apex rounded. Flowers axillary. Pedicel 0.5-3.5 cm. Bracteoles 2, linear, below calyx. Sepals 5, ca. 5 mm; lower and upper sepals ovate-lanceolate; lateral 2 sepals lanceolate to linear. Corolla blue, purple, or white, 8-10 mm, obscurely 2-lipped. Stamens didynamous. Stigma capitate. Capsule narrowly ovoid, enveloped in persistent calyx, apex acute. Seeds yellow-brown, ellipsoid, truncate at one end, longitudinally striate. Fl. May-Oct. (Flora of China)