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Rhododendron is a very large genus of about 1,024 species of woody plants in the heath family (Ericaceae). They can be either evergreen or deciduous. Most species are native to eastern Asia and the Himalayan region, but smaller numbers occur elsewhere in Asia, and in North America, Europe and Australia.
The Royal Horticultural Society (RHS), founded in 1804 as the Horticultural Society of London, is the UK's leading gardening charity.
RHS Garden Wisley is a garden run by the Royal Horticultural Society in Wisley, Surrey, south of London. It is one of five gardens run by the society, the others being Harlow Carr, Hyde Hall, Rosemoor, and Bridgewater. Wisley is the second most visited paid entry garden in the United Kingdom after the Royal Botanic Gardens, Kew, with 1,232,772 visitors in 2019.
The Award of Garden Merit (AGM) is a long-established annual award for plants by the British Royal Horticultural Society (RHS). It is based on assessment of the plants' performance under UK growing conditions.
The Victoria Medal of Honour (VMH) is awarded to British horticulturists resident in the United Kingdom whom the Royal Horticultural Society Council considers deserving of special honour by the Society.
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 arboreum, the tree rhododendron, is an evergreen shrub or small tree with a showy display of bright red flowers. It is found in Bhutan, China, India, Myanmar, Nepal, Sri Lanka, Pakistan and Thailand. It is the national flower of Nepal. In India it is the state tree of Uttarakhand and state flower of Nagaland.
Rhododendron argyrophyllum (银叶杜鹃) is a species of flowering plant in the heath family Ericaceae. It is native to forested slopes at 1,600–2,300 m (5,200–7,500 ft) in E and NW Guizhou, S and W Sichuan, and NE Yunnan in China.
Rhododendron facetum (绵毛房杜鹃) is a species of flowering plant in the family Ericaceae. It is native to northeast Myanmar, northern Vietnam, and western Yunnan, China, where it grows at altitudes of 2,100–3,600 m (6,900–11,800 ft). It is a shrub or small tree that grows to 3–7 m in height, with leathery leaves that are oblong-elliptic to obovate-elliptic, 8.5–20 by 3–6 cm in size. Flowers are red with deeper colored spots.
Rhododendron degronianum is a species of rhododendron native to northern parts of Honshu, the largest island of Japan, where it grows at altitudes of about 1,800 meters (5,900 ft).
Rhododendron fulvum is a species of flowering plant in the heath family Ericaceae, native to northern Myanmar and China. In China, it is found in southwest Sichuan, southeast Xizang, and western Yunnan. It grows at altitudes of 2,700–4,400 m (8,900–14,400 ft). It is an evergreen shrub or small tree growing to 2–8 m (6.6–26.2 ft) in height, with leathery leaves that are oblanceolate to oblong-lanceolate or obovate, 8–20 by 3–7.5 cm in size. The undersides are felted with a striking cinnamon colour. The flowers, borne in trusses in spring, are loosely bell-shaped, pale rose pink, with a crimson basal blotch and sometimes red spots.
Rhododendron impeditum (粉紫杜鹃), the dwarf purple rhododendron, is a species of flowering plant in the family Ericaceae, native to southwestern Sichuan and northwest Yunnan in China, where it grows at altitudes of 2,500–4,600 m (8,200–15,100 ft). This compact evergreen shrub grows to 60 cm (24 in) tall and broad. The leaves are ovate, elliptic or broadly elliptic to oblong, 0.5–1.4 by 0.3–0.6 cm in size. The flowers are purple, violet, or rose-lavender, or rarely white.
Rhododendron mucronulatum, the Korean rhododendron or Korean rosebay, is a rhododendron species native to Korea, Mongolia, Russia, and parts of northern China. It is a deciduous shrub that grows to 1–2 m (3.3–6.6 ft) in height, with elliptic or elliptic-lanceolate leaves, 3–7 cm long by 1–3.5 cm wide. The reddish-purple flowers appear in late winter or early spring, often on the bare branches before the foliage unfurls. It inhabits forested regions at 1,600–2,300 m (5,200–7,500 ft).
Rhododendron dauricum is a species of flowering plant in the heath family Ericaceae native to forests and forest margins in Eastern Siberia, Mongolia, North China and Hokkaido, Japan. The Latin specific epithet dauricum means "from Siberia" – Transbaikal is also known as Dauria.
Ericoideae is a subfamily of Ericaceae, containing nineteen genera, and 1,790 species, the largest of which is Rhododendron, followed by Erica. The Ericoideae bear spiral leaves with flat laminae. The pedicel is articulated and the flowers are pendulous or erect, and monosymmetric, with an abaxial median sepal. The carpels are free and the anthers lack appendages. The capsule is septicidal.
Rhododendron macabeanum, the McCabe rhododendron, is a species of flowering plant in the heath family, Ericaceae. It is native to Assam and Manipur in northeastern India. It is a large evergreen shrub or small tree growing to 12 m (39 ft) in height, with leathery leaves up to 30 cm (12 in) in length. The felted undersides are a grey or buff colour. The flowers, borne in trusses in spring, are bell-shaped, pale to deep yellow, with a purple basal blotch.
Rhododendron sinogrande (凸尖杜鹃) is a species of flowering plant in the family Ericaceae. It is commonly called the great Chinese rhododendron, and is native to alpine regions at 2,100–3,600 m (6,900–11,800 ft) in southeastern Xizang and western Yunnan in China and in northeastern Myanmar.
Rhododendron williamsianum, the Williams rhododendron, is a species of flowering plant in the heath family Ericaceae. It is native to forested slopes at 1,800–2,800 m (5,900–9,200 ft) in western Guizhou, southwestern Sichuan, southeastern Xizang and northeastern Yunnan in southern and western China.
James Robert Gowen (1784–1862) was an amateur English botanist and horticulturist, who was secretary of the Royal Horticultural Society (RHS) from 1845 to 1850, treasurer until 1855, a landowner in the Wairau Valley in 1848, was still paying rates in Nelson in 1862 and was a director of the New Zealand Company from 1840 to 1854. He was a lay member of the Lunacy Commission from 1842 to 1844 and patron of the Nelson Agricultural and Horticultural Society in 1845.
References
- ↑ "Rhododendron rousei (V) | /RHS Gardening". www.rhs.org.uk. Retrieved 1 July 2022.
- ↑ "Rhododendron rousei Argent & Madulid | Plants of the World Online | Kew Science". Plants of the World Online. Retrieved 1 July 2022.
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