Kalmia angustifolia is a flowering shrub in the family Ericaceae, commonly known as sheep laurel.

[1] It grows commonly in dry habitats in the boreal forest, and may become dominant over large areas after fire or logging.

[2] Like many plant species of infertile habitats it has evergreen leaves and mycorrhizal associations with fungi.

[4] The narrow evergreen leaves, pale on the underside, have a tendency to emerge from the stem in groups of three.

[7] Numerous cultivars have been selected for garden use, of which K. angustifolia f. rubra,[8] with rich red flowers, has also won the award.