Annual, with erect, wiry branches, up to 30 mm tall. Leaves sessile, linear-elliptic, dorsiventrally flattened, 1-2 x 0.5-1 mm. Flowers solitary in axils of terminal leaves, ± cup-shaped, petals 1-1.5 mm long, white or cream, tinged red.
Like C. decumbens but flowers solitary in axils.