This section is from the book "British Wild Flowers - In Their Natural Haunts Vol5-6", by A. R. Horwood. Also available from Amazon: A British Wild Flowers In Their Natural Haunts.
This is a native species, and local. The habitat is moist, sandy, damp, turfy, gravelly places. The habit is prostrate. The stems are branched below. The leaves are alternate, ovate or lance-shaped, acute, borne on short stalks. The flowers are numerous, stalkless, solitary in the axils, white or pink or pale rose-colour. The sepals are lance-shaped, longer than the corolla, which is erect, 4-fid, very small, and without glands at the base. The capsule is round, opening transversely, many-seeded, the seeds 3-angled. The plant is 1-3 in. in height, and flowers in June and July, being a herbaceous annual.