Thank you for the kind words. Here is the whole plant (June 28), and another picture taken today (3 months later) to show how it is moving along.
Here are some siblings to show the variation among these seedlings (at least two different fathers that I can tell)... the fat one is growing sideways because a squirrel took a huge bite of it when it was young. (And spat it out afterwards because Euphorbias taste terrible... lesson learned! )