sloe

The small, astringent, wild fruit of the blackthorn (Prunus spinosa).

There is also a dryness in the mouth from the increased action of the absorbent vessels, when a sloe or a crab-apple are masticated...

The dew-drops fell like water, leaf after leaf dropped from the trees, the sloe-thorn alone still bore fruit, but the sloes were sour, and set the teeth on edge. Oh, how dark and weary the whole world appeared!

The tree Prunus spinosa.

Any of various other plants of the genus Prunus, as a shrub or small tree, Prunus alleghaniensis, bearing dark-purple fruit.