Van Gogh painted euphorbias!

Since my recent post extolling the virtues of euphorbias, I feel like I've had heightened euphorbia-awareness. I'm seeing new varieties avilable for sale--variegated, and so on. And one day I noticed in the art department office at the college where I teach, this print of a Van Gogh painting (which I've seen there dozens of times) and I suddenly realized, those are euphorbias in that vase! What do you know. (click image to enlarge).