Thanks, Jo Ann and Anne.
Susan - yes, those plants come true from seed - it may also be that that is the only Euphorbia that I have so there is no cross pollination. Send me a t-mail in a couple of months to remind me to collect some seeds. I do have a couple of seedlings that may be small enough to dig up and send to you if Virginia doesn't have strict laws against plants coming in. If that is the case, just t mail me your address and I'll send a few to you to try. Since CA if so careful about getting pests from other states, I have to be careful what I receive. For that reason, I normally trade bulbs since I can wash the soil off relatively easily.
I have the bird of paradise next to the house and it survives the 14 days or so of frost we have here. Not sure if zone 8a is too cold or not.