[2] Three-nerved sandwort is a small, slender, slightly pubescent annual growing 10 – 40 cm tall.

[4] The flowers measure approximately 6 mm in diameter, with each bearing ten stamens and three styles.

[4] The plant is widely distributed in Britain and much of mainland Europe, although it is absent from the Hebrides, Orkney, and Shetland.

[8] A Polish study in the Niepołomice Forest found that three-nerved sandwort accumulated high amounts of heavy metals from pollutive industrial emissions in its tissues, especially of cadmium.

[9] Three nerved sandwort superficially resembles chickweed but is distinguished from the latter by its deep longitudinal leaf veins and undivided petals.