|Western Labrador tea|
Rhododendron columbianum, commonly known as western Labrador tea, is a shrub that is widespread in the western United States and in western Canada, reported from British Columbia, Alberta, Washington, Oregon, Idaho, California, Montana, Wyoming, Utah, Nevada, and Colorado. It grows in wet places from sea level up to 3500 m (12,000 feet). It was formerly known as Ledum columbianum.
Rhododendron columbianum is a shrub up to 2 m (7 feet) tall, spreading by means of underground rhizomes. The evergreen leaves are ovate to lanceolate, fragrant when crushed. Flowers are white to cream, borne in groups of 10-35.
Rhododendron columbianum has been used medicinally as a tea astringent, diaphoretic, diuretic and laxative properties. The plant can, however, be toxic if the tea is allowed to steep too long. The fragrance of the leaves has also been shown useful in repelling insects and rodents.