Labrador tea
noun
a North American bog shrub, Ledum groenlandicum, of the heath family, having evergreen leaves and rounded clusters of white flowers.
Origin of Labrador tea
An Americanism dating back to 1760–70
British Dictionary definitions for labrador tea
Labrador tea
noun
either of two arctic evergreen ericaceous shrubs, Ledum groenlandicum or L. palustre var. decumbens
(in Canada) an infusion brewed from the leaves of either of these plants