I^ve seen around a dozen White Disas on TM in the last month. They don^t seem to clump together like Red Disas do. Here I saw two plants within a few meters of each other.
A semi-deciduous Namib Desert shrub. The white flowers grow into succulent fruits that have 5 wings and are 1,5 cm in diameter.In sandy areas it collects wind-blown sand to such an extent that only the leaves are visible above a mound of sand.