Let's see your Euphorbias in action!
Here to start things off is a family portrait: mom, pop, and volunteer baby E. genoudiana, looking about as leafy as they get here.
The third plant just showed up one day next to that Adenium (in a 12 inch pot). They make excellent companion plants so I'm leaving them together for life. E. genoudiana is mostly a spring-summer grower though it does not actually go fully dormant in winter (and tolerates our winter rainfall). It makes bisexual flowers but is not self-compatible.