Rumicastrum granuliferum (synonym Calandrinia granulifera) is an annual herb[3] in the family Montiaceae, and is native to New South Wales, Tasmania, Western Australia, South Australia, and Victoria.

It grows on sandy and gravelly soils on granite outcrops and slopes.

[3] The flowers are on pedicels (stems) which are 0.5–2 mm long and erect when in fruit.

The black capsule is almost spherical with three short valves which open at the apex only.

The species was first described as Calandrinia granulifera by George Bentham in 1863.