Ledum latifolium, Ledum palustre.

Ledum latifolium Jacq. Ericaceae. Labrador Tea.

Northern climates. The leaves are said to have been used as a substitute for tea during the Revolutionary War. Lindley says the leaves are used to render beer heady.

Ledum palustre Linn. Marsh Rosemary.

Northern and arctic regions. This plant furnished a tea to Richardson in his arctic journey. (Marsh Rosemary has a weird sweet scent and gives people headaches. It's not suitable for "a tea" really. -Henriette)

Sturtevant's Edible Plants of the World, 1919, was edited by U. P. Hedrick.