Clusters up to 300 mm diam. Leaf-pairs succulent, up to 20 mm long, 12 mm diam., cordate to globose, apex oft en ± bilobed and keeled. Epidermis greyish green, spotted, velvety-papillate or shining, keels lined with green or red or unmarked. Flowers diurnal, showy, petals magenta, pink or white (orange in hybrids with C. aurifl orum and C. meyeri).