This section is from the book "An Illustrated Flora Of The Northern United States, Canada And The British Possessions Vol2", by Nathaniel Lord Britton, Addison Brown. Also available from Amazon: An Illustrated Flora of the Northern United States, Canada and the British Possessions. 3 Volume Set..
Low shrubs, the foliage hirsute, the leaves small, alternate. Flowers mostly solitary in the axils of leaf-like bracts, slender-pedicelled pink or purple. Calyx-segments 5, foliaceous, hirsute or ciliate, deciduous. Corolla saucer-shaped, acutely 5-lobed, with 10 pouches below the limb. Stamens 10. [Diminutive of Kalmia.]
Three species, the following typical, the others Cuban.
Kalmia hirsuta Walt. Fl. Car. 138. 1788. Kalmiella hirsuta Small, Fl. SE. U. S. 886. 1903.
A branching shrub, 1°-2° high, the branches ascending, hirsute. Leaves oblong or oblong-lanceolate, very nearly sessile, flat, or the margins slightly revolute, villous-hirsute, acute or obtusish, becoming glabrate in age, dark green above, lighter beneath, 3"-6" long; flowers solitary, or rarely 2-3 together in the axils, rose-purple, 5"-9" broad; pedicels very slender, nearly or quite glabrous; calyx-segments ovate-lanceolate, acute, or lanceolate, longer than the capsule; capsule depressed, about 1 1/2" in diameter, glabrous.