I did find the giant zinnia that has green on the backs of the flower petals. It is called Blue Point. It has a form that allows bees to feed freely from the flower. I like that they give the bumble bees a sturdy bed, too.
One evening years ago I was checking things out back and noticed that many bees had landed on the zinnias. I had never seen that before and worried that they had been affected by a neighbour possibly spraying or something. When morning came no more bees playing dead on the flowers. I guess they were all asleep! Sweet.
The starburst type.
Butterflies like it.
Easy to see how much more available the Blue Point is.