הזיהויים של dkincmbria

It has a basal burl. I think the flower scales are leaf-like, the leaves are isofacial, and the location is on a high ridge

fruit glabrous, thorns curved and stout

With a bit of A. latifolia mixed in.

On beach near high tide line, or maybe just above?

Here is what is perhaps a non-hybrid Abronia latifolia, but I can't ever be sure.