This low-creeping hairless fleshy perennial has stout spreading stems and is a plant of shallow standing water and muddy places. Its little (7-8mm) pretty blue flowers appear from May to September, growing in spikes and in pairs arising from the leaf axils, reaching 30cm high. The leaves are bluntly toothed, oval and opposite. Related to Speedwells, this plant grows commonly within its own habitat throughout the country. This is a native plant and belongs to the family Veronicaceae.
I first identified this flower in Rath, Co Kerry in 1977 and photographed it near Saltmills in Co Wexford in 2007.
If you are satisfied you have correctly identified this plant, please submit your sighting to the National Biodiversity Data Centre