Kalmia latifolia and cvs.
(Mountain laurel, Calico bush)
This U.S. native shrub has glossy, dark green leaves. Bowl- or cup-shaped pink to white flowers are borne in large clusters from late spring to midsummer. Cultivars include white-flowered 'Pristine', suitable for Zone 8; red-budded, pink-flowered 'Olympic Fire' and 'Sarah'; compact 'Elf' and 'Minuet'; and, for Zone 5, red-budded ‘Nathan Hale’ and 'Ostbo Red'.