Chris Mattison / Endemic Stone plant (Argyroderma delaetii) with one new and one old seedpod, growing among quartz pebbles in the Knersvlakte, Western Cape, South Africa

Chris Mattison / Endemic Stone plant (Argyroderma delaetii) also known as Bababoudjes (Babies' bottoms), growing among quartz pebbles in the Knersvlakte, Western Cape, South Africa

Chris Mattison / Endemic succulents Oophytum nanum and Argyroderma delaetii growing among quartz pebbles in the Knersvlakte, Western Cape, South Africa, where they are endemic

Chris Mattison / Succulent Argyroderma fissum, growing among quartz pebbles in the Knersvlakte, Western Cape, South Africa

Chris Mattison / Vingervygie (Argyroderma fissum), Knersvlakte region, Namaqualand, South Africa

Chris Mattison / Endemic Stone plant (Argyroderma delaetii), also known as Bababoudjes (Babies' bottoms), growing among quartz pebbles in the Knersvlakte, Western Cape, South Africa

Emanuele Biggi / Stone plant (Lithops gracilidentata) in desert habitat, Namibia

Chris Mattison / Stone plant (Lithops pseudotruncatella) with new leaves forcing their way through the previous year's. Cultivated plant from Namibia.

Chris Mattison / Truncate stone plant (Lithops pseudotruncata) in flower. Cultivated plant

Chris Mattison / Living stone plant flower (Lithops fulviceps "aurea") cultivated plant native to South Africa. Focus-stacked image.

Chris Mattison / Surface of Stone plant (Lithops fulviceps) at high magnification.

Chris Mattison / Living stone plant (Lithops pseudotruncatella) with new leaves bursting through the dried up leaves of last year, and ripe seed capsule. Cultivated species, occurs in South Africa.