Does the Opuntia fragilis in the Puget Sound carry a vernacular name of dune or shore prickly pear?
The most common vernacular name of the cactus Opuntia fragilis in Washington is brittle prickly pear. When I searched for dune or shore prickly pear, I found these common names connected with other species of Opuntia.
For more information about Opuntia fragilis, see the Washington Flora Checklist and the USDA Plant Profile.