BotanyThe recently defined section is comprised of four species, all sparsly to much branched sub-shrubs with subsucculent to woody stems. Petioles semi-persistent to persistent, Flowers with five subequal petals and five (1 species) or seven (3 species) fertile stamens, hypanthium well developed, longer than or equal in length to pedicel. Lamina simple to palmately compound. Basic chromosome number, x = 10. Further characters, on which the species are separated into a section are pollen morphology, RbcL gene sequences, and phenolic composition. See S. Afr. J. Bot. 61 (1995) 331-338 for details.

damarense Knuth syn. otaviense Knuthgrandicalcaratum Knuth
jarmilae J. J. Halda syn. grandicalcaratum Knuth
karooicum Compton & Barnes
otaviense Knuth
roessingense Dinter syn. otaviense Knuth
spinosum Willd.
squarrosum Dinter syn. grandicalcaratum Knuth
virgatum Knuth syn. otaviense Knuth