Frithia humilis

Frithia humilis is a species of plant in the family Aizoaceae. It is one of the few members of Aizoaceae growing endemic to the summer-rainfall region of South Africa. It is restricted to two provinces of South Africa: Gauteng and Mpumalanga.
This small plant consists of a cluster of long, succulent leaves that stick out just above the sandy gravel, with a thickened underground rootstock. The leaves lose water and contract during drought, hiding underground and so preventing more water loss.
References.
"South African National Biodiversity Institute, South Africa."