Wondering if anybody knows of any Euphorbia species which have milii-like flowers like those above, but much larger. The flowers in the picture were maybe an inch, inch and a half (2.5 to 3.8 cm) across, and the stem looked less like Euphorbia milii and more like Pachypodium lamerei: sort of silvery-shiny, and a good inch and a half (3.8 cm, again) thick, with longer but sparser thorns than on the E. miliis I've seen. I didn't get any pictures of the stem, and am now wishing I had, but I'm hopeful someone will know anyway. Is this probably still a milii cultivar? Are there hybrid Euphorbias like what I've described?
It's probably too late for me to buy one (this was some time ago, at Frontier Garden Center in Cedar Rapids), but I'm curious about how variable of a species E. milii might actually be.
(EDITED because for some reason I am unable to remember that it's miLii, not miLLii.)