beach plum

US /ˈbiːtʃ ˌplʌm/
UK /ˈbiːtʃ ˌplʌm/
"beach plum" picture
1.

a small, edible, tart fruit that grows on a shrub native to the eastern coast of North America, often used for jams and jellies

:
We gathered beach plums along the dunes for making preserves.
The tartness of the beach plum makes it ideal for jellies.
2.

a deciduous shrub (Prunus maritima) that grows along the Atlantic coast of North America, producing small, tart, edible fruits

:
The beach plum thrives in sandy, coastal environments.
Many coastal areas are working to preserve the native beach plum.