My big Desert Rose is in the lobby at Ivy Point Cypress. Latin name is Adenium obesum.  Here is a little history on it. I bought it from Claude Townsend in San Antonio about 2002 or perhaps a couple of years earlier. It was about 12 inches high at the time. It has lived in San Antonio, Kerrville, Boling and Cypress.  About six years ago it won Best of Show at the Wharton Garden Club annual plant show. About every two years I take it out of the pot, wash the roots and trim the limbs. After a couple of weeks, I plant it a little higher in the pot than last time to expose more of the caudex.