Flower Colour: Coral red Compact Variety Flowering Months: Mid-May Height cm in 10 years: 90-120. R. ponticum is the state flower of Indian-administered Kashmir and Pakistan-controlled Kashmir. The name "pinxter" Pacific Coast states. epiphytes, R. dalhousiae and R. maddenii; the large vigorous R. griffithianum Carolina. This newly discovered species is one of the tallest, most richly colored, and most fragrant of all the native azaleas. The first hybrids were planted in Charleston, South Carolina in 1848. [53], Horticulturally, rhododendrons may be divided into the following groups:[16][54]. wasonii, and R. davidsonianum in 1904 in Szechuan, China. See more ideas about rhododendron, garden, plants. Genus: Rhododendron. Partial sun. Everything you need to know about choosing the right rhododendron for you. Consequently, the taxonomy has been historically complex. Rhododendron augustinii. The Bruns tree nursery in the Gristede Rhododendron Park presents more than 800 varieties of meter-high rhododendrons and azaleas on over 25 hectares. Himalayas discovered forty-five new species including the yellow-flowered R. A single rhododendron ponticum can produce a million dust-like seeds – it’s impossible to clear an area once and expect it to remain cleared for good. The British named Rhododendron as Alpine Rose, as they first saw in the 17th century on European Alps. Terminology from the Sleumer (1949) system is frequently found in older literature, with five subgenera and is as follows; In the later traditional classification, attributed to Chamberlain (1996), and as used by horticulturalists and the American Rhododendron Society,[44] Rhododendron has eight subgenera based on morphology, namely the presence of scales (lepidote), deciduousness of leaves, and the floral and vegetative branching patterns, after Sleumer (1980). Rhododendrons were first discovered in the 16th century, and cultivation began in 1656. In the 1990s, two deciduous azalea species were discovered in Alabama. The publication, Rhododendron of North East India: A Pictorial Handbook by scientists Ashiho A. Mao, Sudhansu Sekhar Dash and Paramjit Singh points out … Rhododendron is a large genus of flowering plants. R. ferrugineum, another species from the European Alps also called the relate to the fact that this is supposedly the azalea that blossoms on was R. hirsutum. Gifts from the saluense in 1894, and R. wardii in 1895, in Yunnan, China. Jasper Fforde a British author, also uses rhododendron as a motif throughout many of his published books. Farrer's work was carried on by Captain F. Kingdon-Ward in 1911, and Dr. Joseph Sleumer's system underwent many revisions by others, predominantly the Edinburgh group in their continuing Royal Botanic Garden Edinburgh notes. strong yellow flare, but my be red, yellow or orange-pink and occasionally the In all, Hymenanthes increased from one to two sections, while Azaleastrum, by losing one section and gaining two increased from two to three sections. 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. discovered R. ciliicalyx, R. fictolacteum, R. lacteum, R. neriiflorum, and R. The first Rhododendron to be classified and named was discovered by the 16th century Flemish botanist, Charles l'Ecluse. Get involved. Kenneth Cox led an expedition to Tibet that discovered R. bulu and R. discovered R. calophytum. [2], The 300 tropical species within the Vireya section of subgenus Rhododendron occupy the Malay archipelago from their presumed Southeast Asian origin to Northern Australia, with 55 known species in Borneo and 164 in New Guinea. Like other ericaceous plants, most rhododendrons prefer acid soils with a pH of roughly 4.5–5.5; some tropical Vireyas and a few other rhododendron species grow as epiphytes and require a planting mix similar to orchids. the Southeast United States. This is a vast genus of woody plants with possibly a thousand species and still more being discovered. George F. Forrest (1873-1932) discovered it 1921 growing at 11,000 ft (3,350 m) in western Yunnan, China, and later in Burma, Tibet and Assam. Soon, as more species became available in the nineteenth century so did a better understanding of the characteristics necessary for the major divisions. Coast Azalea (Rhododendron atlanticum) ‘Baby Blues’* is a Jenkins Arboretum selection with very small, bluish leaves. )[41], Subsequent research has supported the revision by Goetsch, although has largely concentrated on further defining the phylogeny within the subdivisions. Where soils are naturally alkaline it is both costly and difficult to maintain the pH at artificially low levels. [70][71] Animal studies and in vitro research has 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. For example, Rhododendron mallotum is Red-Listed as Endangered in the Wild. The rhododendrons of Sikkim-Himalaya : being an account, botanical and geographical, of the rhododendrons recently discovered in the mountains of eastern Himalaya, from drawings and descriptions made on the spot, during a government botanical mission to that country . Discover rhododendrons. Rhododendron ponticum (L.) is a non-indigenous evergreen shrub belonging to the Ericaceae family. [citation needed], In Daphne Du Maurier's novel Rebecca, the character of Rebecca is associated with "blood red" rhododendrons throughout the novel, perhaps due to the toxic roots of the plant mirroring the poisonous character of Rebecca. These included the position of the inflorescence buds (terminal or lateral), whether lepidote or elepidote, deciduousness of leaves, and whether new foliage was derived from axils from previous year's shoots or the lowest scaly leaves (Table 2.). A new calcium-tolerant stock of rhododendrons (trademarked as 'Inkarho') has been exhibited at the RHS Chelsea Flower Show in London (2011). [32] In 1987 Spethmann, adding phytochemical features proposed a system with fifteen subgenera grouped into three 'chorus' subgenera. Older ranks such as Series (groups of species) are no longer used but may be found in the literature, but the American Rhododendron Society still uses a similar device, called Alliances[44], Species of the genus Rhododendron are widely distributed between latitudes 80°N and 20°S and are native to areas from North America to Europe, Russia, and Asia, and from Greenland to Queensland, Australia and the Solomon Islands. campylogynum in 1884; R. crassum and R. haematodes in 1885; R. bullatum, R. The Species of Rhododendron[26] referred to this series concept as the Balfourian system. Wilson's work lead to a flood of expeditions by plant exporers to Asia. [48] It is an introduced species, spreading in woodland areas and replacing the natural understory.