Spergularia media can be distinguished from spergularia marina by its lighter petal colour, having petals longer than the sepals, and for its less hairy stems.
Main flower color:
All of the UK, in coastal regions
Up to 30 cm
Saltmarsh, dune slacks, ditches
Up to 12 mm in diameter; five cupped pink petals (sometimes nearly white), paler towards the base, a little longer than the five sepals, which are mostly green, with a thin white margin. Sepals are glandular hairy underneath, but the rest of the plant is hairless
Linear, hairless, fleshy, with a small bristle at the tip
June to September