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The rash typically persists one to two weeks, but in some cases may last up to five weeks. Urushiol is primarily found in the spaces between cells beneath the outer skin of the plant, so the effects are less severe if the plant tissue remains undamaged on contact. Once the oil and resin are thoroughly washed from the skin, the rash is not ...
The base structure is a 5/7/6/5 ring system that does not contain nitrogen. [3] More than 25 grayanotoxin isoforms have been identified from Rhododendron species [6], but grayanotoxin I and III are thought to be the principal toxic isoforms.
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 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 ]
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]
Droopy or curled up foliage on this shrub is a sure sign your plant isn't happy. Here's how to diagnose and correct the problem.
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.