Euphorbia davyi, previously E. bergii, is a spineless succulent (not reflecting on its character, but differentiating it from many other Euphorbia species, not from others, such as the vingerpol ones).
Young, short stems in the middle, older stems veering outwards around them, all are regularly lined up according to length in a disc-like structure, resulting in a mound or low dome that would have pleased Euclid, as well as some sculptors. The plant has a long taproot.
This picture was taken near Daniëlskuil south of Kuruman in the Northern Cape, further west than where E. davyi is normally found. Expect geographical queries when species splitting or lumping goes on (Frandsen, 2017; Smith, et al, 1997; iNaturalist; iSpot).