Many small white flowers, petals shorter than acute-angled sepals. No non-flowering shoots. Few leaves, narrow, straight or recurved. Slender, often erect plant. Stems 15-30cm.
Rare casual on dry bare ground, walls, paths, roadsides. Previously a colonist of railway tracks in central Ireland, now much decreased due to use of herbicides.
Correction: Photographs previously shown were
Thyme-leaved Sandwort, Arenaria serpyllifolia Correction by Paul Green