Taxonomic notes on the genus Khadia (Mesembryanthemaceae/Aizoaceae)

The taxonomic status of the five species that comprise Khadia N.E.Br. is clarified on the basis of macro- and micro-morphology. Distribution data, descriptions and a taxonomic key to the species are provided. In Khadia we recognise the following species: K. acutipetala (N.E.Br.) N.E.Br., K. alticola Chesselet and H.E.K. Hartmann, K. beswickii (L.Bolus) N.E.Br., K. borealis L.Bolus and K. carolinensis (L.Bolus) N.E.Br.