A North American shrub or small tree, Rhamnus alnifolia with serrated leaves, inconspicuous yellow flowers, and dark red berries which turn black on ripening.
Origin
Early 19th century.
Definition of alder-leaved buckthorn in US English:
alder-leaved buckthorn
adjective
A North American shrub or small tree, Rhamnus alnifolia with serrated leaves, inconspicuous yellow flowers, and dark red berries which turn black on ripening.