ssp. valida G.D.Rowley. Photo by
Cactus Art Nursery.
This member of the Euphorbiaceae
family was given this name by William Aiton in 1789. It is found the
western part of South Africa, growing in a well drained soil with
lots of sun. It will grow up to 10 centimetres or more, and get
greenish yellow flowers quite similar to
obesa, but on long stalks.
I might not consider
this to be a caudiciform, but here it is anyway.