Here's what Mark Dimmitt, he wrote the book, says about what he's gotten from seeds:
Complex adenium hybrids often produce unexpected offspring. You often cannot deduce the parentage by the appearance of the plant and flowers.
For example, I crossed a Harry Potter type flower with a pink from India, and a quarter of the offspring have pure white or yellow flowers. In another case, I crossed Daeng Siam (red with purple edge) with two Harry Potter types. The offspring were either solid red or white with bold stripes.
The strangest result to date was a cross of two yellows. I got no yellows, most offspring were white with pink edge or Harry Potter types.
