Charlie,
When I lived in Cathays Valley, California (that's West of Yosemite
Park, in the foothills of the Sierras), I had a hedgerow of Wild Almond,
Prunus dulcis. Wild Almonds are about the bitterest thing I have ever put
in my mouth. To make them useful, I grafted everything Prunus I could find.
Peaches, Nectarines, Plums, Sweet Almonds AND Sweet Cherry. Does that come
closer to answering your question?