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Rhododendron maximum is a species of Rhododendron native to the Appalachians of eastern North America, from Alabama north to coastal Nova Scotia. Its common names include great laurel , [ 2 ] great rhododendron , rosebay rhododendron , American rhododendron and big rhododendron .
It is a low shrub growing to 50 cm (rarely up to 120 cm) tall with evergreen leaves 12–50 mm long and 2–12 mm broad. The flowers are small, with a five-lobed white corolla, and produced several together in a corymb 3–5 cm diameter. They emit strong smell to attract bees and other pollinating insects.
Rhododendron species have long been used in traditional medicine. [ 87 ] [ 88 ] Animal studies and in vitro research have identified possible anti-inflammatory and hepatoprotective activities which may be due to the antioxidant effects of flavonoids or other phenolic compounds and saponins the plant contains. [ 89 ]
Growing 3–7 m (9.8–23.0 ft) tall, it is an evergreen shrub with handsome elliptic or lanceolate leaves up to 13 cm (5.1 in) in length; and pale pink bell-shaped flowers in late spring. The Latin specific epithet argyrophyllum , meaning "silver-leaved", refers to the silvery-white under-surface ( indumentum ) of the leaves.
Rhododendron macrophyllum, the Pacific rhododendron, [2] California rosebay, [3] California rhododendron, coast rhododendron or big leaf rhododendron, is a large-leaved species of Rhododendron native to the Pacific Coast of North America. It is the state flower of Washington. [4]
Rhododendron austrinum is a species of flowering plant in the heath family known by the common names Florida flame azalea, honeysuckle azalea, southern yellow azalea, and orange azalea. It is native to the southern United States, where it can be found in Alabama , Florida , Georgia , and Mississippi . [ 1 ]
Look at the yellow-green button-like flowers in the center of the leaf clusters. Optimally, the flowers are tightly closed and little or no pollen is visible. 2.
Most rhododendrons of the region have tubular flowers with 5 stamens each, while R. canadense has 10 stamens housed inside a zygomorphic corolla. The leaves open only after the flowers have bloomed and wilted; they are narrow oval, 2–6 cm long and 1–2 cm broad.