The Happy returns blossom is shaped a lot like Stella De Oro but the blossom is a little larger. The plant is larger than Stella also. You can see the bright yellow from a distance. It catches your attention. I don't have a picture on my cell but I'll take one of the plant in noon day sun when it blooms this year. My Happy Returns blossom was open by 8 a.m. I have no idea why it would open at 5pm for someone else. That doesn't sound right.
This pic I found online looks correct for the fully open HR blossom...
