Kalmia latifolia L.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Species Description - Shrub or small tree 2–3(–10) m, often forming dense thickets; petioles 1–2 cm; lvs all or mostly alternate, leathery, elliptic or lanceolate, 5–10 cm, usually acute at both ends, rich green, glabrous; fls numerous in terminal corymbs, on pedicels 1–4 cm; sep lance-oblong, 3 mm, not imbricate; cor white to rose with purple markings, 2–2.5 cm wide; fr depressed-globose, 6–8 mm wide; 2n=24. Woods, chiefly in sandy or rocky, acid soils; se. Me. to Ga., w. to s. O., s. Ind., Miss., w. Fla., and se. La.