All of the Euphorbia flowers are now completely open and almost at the end of their lifetime. I watered my Euphorbias yesterday and today the open flowers show some guttation.
Also the stamens are starting to fall off. Unfortunately I haven't had a female plant to pollinate with my plant's pollen. But maybe one of the other two is a female and I'll have better luck next year.
Euphorbia obesa flowers showing guttation on June 5, 2011
Euphorbia obesa flowers on June 5, 2011