Dan Boone wrote:I grow angustifolia here, where they grow wild and are known as "sand plums" -- just one of their many regional names. Honestly I had never heard of any of your named cultivars before; people go wildcraft them along the back roads or they transplant a few wild ones into their yard and wait for a thicket to appear (which is what I'm doing).
Here in early summer when they ripen I should have a bunch of seeds to share. But I don't have any source info for the cultivars you are looking for, sorry!