A montane island set in the lowlands of the Swartland, Piketberg has a number of endemics. The highest peak is Zebrakop at 1438m. The vegetation is threatened by traditional farming such as citrus, as well as rooibos and buchu farming. It is the home to Cape botanist Prof. Peter Linder who grew up in Piketberg and produced a herbarium for the Piketberg Mountains now based in a separate section in the Bolus Herbarium at the University of Cape Town. Peter Linder is a specialist in Restionaceae and has published much on origins of the flora of South Africa.