Crassula namaquensis subsp. comptonii is a dwarf leaf-succulent reaching heights around 20 cm.
It grows dense clusters of bluntly rounded leaves, covered in short white hairs.
The mostly yellow (rarely white) flowers grow in rounded clusters on fleshy, pink peduncles well above the leaves. The flowers have greenish, hairy sepals and five petals. It does not appear as if pedicels can be anything but tiny, if present.
The subspecies distribution is restricted to part of the Bokkeveld Plateau in the Northern Cape. This plant was found flowering in September west of Nieuwoudtville.
The habitat is semi-arid scrub, the plants growing in sandstone derived soils.
There are two more subspecies, viz. C. namaquensis subsp. namaquensis of the Port Nolloth area with “insignificant whitish-green flowers, unlikely to attract average attention” (Eliovson, 1990) and subsp. lutea that also has yellow flowers (Frandsen, 2017; Eliovson, 1990; Bond and Goldblatt, 1984; iNaturalist; http://redlist.sanbi.org).