From Eastern Africa, Monadenium ritchiei, is a rounded tuberculed, branching succulent with stems 2 feet tall and 1-1/4 inches around. Mine is a subspecies nyambense, which has pink cyathia rather than the typical green. If grown in enough light the leaves can take on a purple hue.
     I got a potfull of this at Home Depot. I split it up and put one cutting in the ground. It seems to be hanging in there. Below is about as close as I can get to the little tiny flowers.