By skyforbes 
Bacopa monnieri
Herb-of-grace, Bacopa, Brahmi, Water Hyssop
Plantaginaceae
Margins of freshwater or brackish pools or streams, sometimes submerged. Coast, Ranges, and the eastern edge of the Tablelands, north from Jervis Bay. Occasionally elsewhere.
Prostrate perennial herb, rooting at the nodes, often forming dense mats. Leaves often more or less fleshy. Branchlets hairless. Leaves opposite each other, 0.35–1.5 cm long, 1.5–7 mm wide, tips rounded, margins entire. Flowers white or pale blue, 4.5–9 mm long, tubular, the tube 2–4.5 mm long, with 5 spreading rounded lobes. Flowering spring–summer.
PlantNET description: https://plantnet.rbgsyd.nsw.gov.au/cgi-bin/NSWfl.pl?page=nswfl&lvl=sp&name=Bacopa~monnieri (accessed 12 January 2022)