The single species of the genus Lapidaria occurs in the Warmbad area of southern Namibia and adjacent areas of the Northern Cape Province, South Africa. They are tight, compact plants with one to four succulent leaf pairs per main branch. Each pair of leaves is keeled. The plants flower in winter during the day. They prefer a sandy soil and need to be watered frequently but lightly during their active period in the autumn and winter. They are propagated by seed.