Beach plum

a shrub, Prunus maritima, of the rose family, of the seashores of northeastern North America, having sharply toothed leaves and white flowers.
the purple or blackish edible fruit of this shrub.
Historical Examples

The wind whined among the pines which grew along the ridge of beach plum Point.
Ruth Fielding Down East Alice B. Emerson

The beach plum and bayberry bushes on the dunes were spangled with beady drops.
Keziah Coffin Joseph C. Lincoln

beach plum Point was the easterly barrier of sand and rock that defended the beautiful harbor from the Atlantic breakers.
Ruth Fielding Down East Alice B. Emerson

The crowd from beach plum Point came over in the cars about noontime.
Ruth Fielding Down East Alice B. Emerson

From the extreme end of beach plum Point they could merely watch proceedings aboard the craft, and wonder what it was all about.
Ruth Fielding Down East Alice B. Emerson

But the manager of the film corporation waited to see the motor-yacht inside the shelter of beach plum Point.
Ruth Fielding Down East Alice B. Emerson

But she was glad to learn all that was known about the beach plum Point hermit.
Ruth Fielding Down East Alice B. Emerson

She skirted the outlying clumps of bayberry and beach plum bushes and entered the grove.
Keziah Coffin Joseph C. Lincoln

noun
a rosaceous shrub, Prunus maritima, of coastal regions of E North America
its edible plumlike fruit