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Rhododendron is a genus of 1,024 species of woody plants in the heath family (Ericaceae), either evergreen or deciduous, and found mainly in Asia, although it is also widespread throughout lowland and montane forests in the Pacific Northwest, California, the Northeastern United States, and especially in the highlands of the Appalachian Mountains of North America. It is the national flower of Nepal, the state flower of Washington and West Virginia in the United States, the provincial flower of Jiangxi in China and the state tree of Sikkim and Uttarakhand in India. Most species have brightly colored flowers which bloom from late winter through to early summer.
Azaleas are flowering shrubs in the genus Rhododendron, particularly the former sections Tsutsuji (evergreen) and Pentanthera (deciduous). Azaleas bloom in the spring, their flowers often lasting several weeks. Shade tolerant, they prefer living near or under trees. They are part of the family Ericaceae.
Azalea State Natural Reserve is a state nature reserve of California, USA, located in McKinleyville, an unincorporated area of Humboldt County. This area is just north of the college town of Arcata and slightly above the Mad River not far from where it enters the Pacific Ocean. The reserve is dedicated to the preservation of the western azalea, whose pink and white flowers bloom in profusion each April and May. It has a short self-guided nature trail with emphasis on plants of the north coast region. There is a picnic area available. The 30-acre (12 ha) property was acquired by the state in 1943.
The Edith J. Carrier Arboretum is an arboretum and botanical garden on the James Madison University campus, located in Harrisonburg, Virginia, United States in the Shenandoah Valley. Groundbreaking for the arboretum took place April, 1985, under direction of Dr. Norlyn Bodkin,[1] who is credited the first scientific botanical discovery along the Eastern Seaboard of Virginia since the 1940s, Trillium: Shenandoah Wake Robin, presently found at the arboretum[2]. The only arboretum located on the campus of a Virginia state university. Exhibits include a developed trail system through 125 acres (0.51 km2) of mature Oak-Hickory Forrest with two identified century specimens and a species on the U.S. Fish and Wildlife Threatened Species list protected at the arboretum: Betula uber, Round-Leaf Birch.[3]
The Mobile Botanical Gardens were founded in 1974, and are located on Museum Drive in the Spring Hill community in Mobile, Alabama, United States.
Crystal Springs Rhododendron Garden is a botanical garden located between Reed College and the Eastmoreland Golf Course in southeastern Portland in the U.S. state of Oregon.
The State Botanical Garden of Georgia is a botanical garden of 313 acres in the United States, with a conservatory operated by the University of Georgia. It is located at 2450 South Milledge Avenue, Athens, Georgia.
Botryotinia fuckeliana is a plant pathogen, and the causal agent of gray mold disease.
Rhododendron occidentale, the western azalea or California azalea, is one of two deciduous Rhododendron species native to western North America. The western azalea is known to occur as far north as Lincoln and Douglas Counties in Oregon and as far south as the mountains of San Diego county. Typically found in the coastal ranges of western North America, it also grows in the Cascade and Sierra Nevada mountain ranges, but is not known east of them.
Rhododendron sect. Pentanthera is a section of subgenus Pentanthera in the genus Rhododendron. It comprises 15-16 species of deciduous shrubs native to temperate regions of the Northern Hemisphere.
Rhododendron luteum, the yellow azalea or honeysuckle azalea, is a species of flowering plant in the heath family Ericaceae, native to southeastern Europe and southwest Asia. In Europe, it occurs from southern Poland and Austria south through the Balkans and east to southern Russia; and in Asia, east to the Caucasus.
Rhododendron calendulaceum, the flame azalea, is a species of Rhododendron native to North America. All parts of this plant are poisonous to humans.
Calonectria indusiata is a fungal plant pathogen with several hosts.
Ovulinia azaleae is a plant pathogen affecting azaleas and rhododendrons.
The Great Balsam Mountains, or Balsam Mountains, are in the mountain region of western North Carolina, United States. The Great Balsams are a subrange of the Blue Ridge Mountains, which in turn are a part of the Appalachian Mountains. The most famous peak in the Great Balsam range is Cold Mountain, which is the centerpiece of author Charles Frazier's bestselling novel Cold Mountain.
The Rhododendron-Park Bremen, also known as the Rhododendron-Park und Botanischer Garten Bremen or Botanika im Rhododendron-Park, is a major collection of rhododendrons and azaleas, as well as a substantial botanical garden, located at Deliusweg 40, Bremen, Bremen (state), Germany. It is open daily; park admission is free but a fee is charged for Botanika.
Rhododendron periclymenoides, commonly called pink azalea and pinxter flower, is a species of shrub in the heath family. It is native to eastern North America, where it is widespread from Alabama to New Hampshire. It is often found in riparian areas, in wet to dry forests.
Rhododendron indicum is an Azalea Rhododendron species native to Japan.
Rhododendron lapponicum is a rhododendron species found in subarctic regions around the world, where it grows at altitudes ranging from sea level to 1900 meters. It is a shrub that grows to 0.2–0.45 m in height, with leaves that are oblong-elliptic or ovate-elliptic to oblong-obovate, 0.4–1.5 by 0.2–0.5 cm in size. Flowers are reddish or purple. And fragrant, scent somewhat like Lily-of-the-Valley.