Quartz pebble field represent a special habitat type in the Knersvlakte. A total of 67 specialized species occurs exclusively on quartz pebble fields, and most of these specues are confined to the Knersvlakte and occur nowhere else (Schmiedel 2004).
The vast major part of these quartz specialists are leaf succulents: many Aizoacea such as species of Argyroderma, Cephalophyllum, Conophytum, Mesembryanthemum (Oophytum and Phyllobolus), but also species of other plant families such as Asphodelaceae (Bulbine), Asteraceae (Othonna), Crassulaceae (Tylecodon), Eriospermaceae (Eriospermum), and Geraniaceae (Pelargonium).
However, quartz field habitats are by no means restricted to the Knersvlakte and also occur further south in the Little Karoo (especially with species of Gibbaeum) and further north up to the Richtersveld, also extend towards the eastern summer rainfall area in the Warmbad and Pofadder region
KnersvlakteSouth AfricasucculentsAfricaquartz pebble fieldpatch