Not to be semantically confused with :
Stonecrops (Sedum) species [plants with similar names belonging to differing genus but in the same family (Crassulaceae)]. Because of its short bulbous fleshy leaves it resembles several different Stonecrops such as English Stonecrop (Sedum anglicum) and White Stonecrop (Sedum album)but is itself one of the
Pigmyweeds (such as New-Zealand Pigmyweed (Crassula helmsii))], but is smaller than any of those.
No relation to : Mossy Sandwort
Mossy Sandwort (Arenaria balearica),
Mossy Stonewort (Chara muscosa) nor Mossy Saxifrage (Saxifraga hypnoides) [plants with similar names belonging to differing families].
Somewhat similar to
Coral Necklace (Illecebrum verticillatum) which is also sprawling with tendencies to go deep red, but at up to 20cm long is longer than the ~5cm of Mossy Stonecrop. The flowers are also tiny and white, but have 5 petals and sepals rather than just the 3 (or sometimes 4) of Mossy Stonecrop.
Coral Necklace a not a succulent either, but grows in perhaps a similar damp sandy heath environment, apart from the 'damp' bit.
Uniquely identifiable characteristics
Distinguishing Feature : Its small bulbously-fleshy leaves only 1-2mm long and its overall shortness itself of only 5cm, and its tendency to quickly turn scarlet red all over apart from the translucent white tiny flowers also just 1-2mm across.
It is a rare native annual plant which is tiny, with tiny 1-2mm long fleshy leaves and tiny 1-2mm across flowers with 3 (sometimes 4) translucent-white petals, slightly shorter red sepals and cream coloured anthers. Its fruit is minute and contains one or 2 seeds.
It grows on acidic soils on bare, sandy or gravelly places such as paths, heathland, open forest rides on the coastal areas fairly near the sea in East Anglia or a few miles around Portsmouth, scattered elsewhere.