Kalmia is a genus of about ten species of evergreen shrubs from 0.2–5 m tall, in the family Ericaceae. They are native to North America (mainly in the eastern half of the continent) and Cuba. They grow in acidic soils, with different species in wet acid bog habitats (K. angustifolia, K. polifolia) and dry, sandy soils (K. ericoides, K. latifolia).
Kalmia procumbens, commonly known as alpine azalea or trailing azalea, is a dwarf shrub of high mountain regions of the Northern Hemisphere that usually grows no more than 10 centimeters (4 in) tall. Originally named by Linnaeus as Azalea procumbens, it is also named after French botanist L.L.A. Loiseleur-Deslongchamps - Loiseleuria procumbens.
Kalmia hirsuta, the hairy mountain-laurel, is a plant species native to the southeastern United States. It is reported from Florida, Georgia, Alabama and South Carolina. It grows in open, sandy locations such as savannahs, sand hills and pine barrens at elevations of less than 100 m (330 feet).
Kalmia latifolia, commonly called mountain laurel, calico-bush, or spoonwood, is a broadleaved evergreen shrub in the heather family, Ericaceae, that is native to the eastern United States. Its range stretches from southern Maine south to northern Florida, and west to Indiana and Louisiana. Mountain laurel is the state flower of Connecticut and Pennsylvania. It is the namesake of Laurel County in Kentucky and the city of Laurel, Mississippi (founded 1882).
Kalmia angustifolia is a flowering shrub in the family Ericaceae, commonly known as sheep laurel. It is distributed in eastern North America from Ontario and Quebec south to Virginia. It grows commonly in dry habitats in the boreal forest, and may become dominant over large areas after fire or logging. Like many plant species of infertile habitats it has evergreen leaves and mycorrhizal associations with fungi. It is also found in drier area of peat bogs.
Kalmia buxifolia is a species of flowering plant in the heath family known by the common name sandmyrtle, or sand-myrtle. It is native to the eastern United States, where it has a disjunct distribution, occurring in three separate areas. It is known from the Pine Barrens of New Jersey, the Coastal Plain of the Carolinas, and the southeastern Blue Ridge Mountains.
Kalmia cuneata is a species of flowering plant in the heath family known by the common name whitewicky, sometimes spelled white-wicky or white wicky. It is native to the eastern United States, where it occurs only in North Carolina and South Carolina.
Kalmia polifolia, previously known as Kalmia glauca and commonly called bog laurel, swamp laurel, or pale laurel, is a perennial evergreen shrub of cold acidic bogs, in the family Ericaceae. It is native to north-eastern North America, from Newfoundland to Hudson Bay southwards.