Crassula grisea is a small branched shrublet of the Richtersveld. It grows to about 20 cm. It produces many tiny, opposite, cylindrical leaves with rounded or pointed tips and tapering bases. The decussate arrangement of leaves on the densely leaved and brittle stems may be more or less regular and pronounced on different plants. Leaf colour may be bright yellow with a faint greenish tinge as in the picture provided, but leaves may also be pale grey, blue-grey or greenish. There may either be a finely velvety or a glabrous surface on the leaves.
Each inflorescence, growing on a single hairy stalk that emerges from a stem-top, consists of a dense cluster of small flowers. There may be several on one plant. The petals form a bell-shaped corolla for the individual flower. The protruding anthers are brown. Blooming occurs in winter (http://crassulaceae.net).