Specifically the hybrid Rhododendron x superponticum, a non-native species that has become invasive in the British countryside.. Popular for its rapid growth and abundant purple flowers, this rhododendron was bred in Victorian times and very widely planted in gardens, estates and country parks. Accepted: TRO: Rhododendron … Superior Rhododendron Caucasicum, also called the Georgian Snow Rose, is a beautiful shrub originating in the Caucasian Mountains of Russia. Europe and North America have fewer native species. Terms and Conditions — c='\" >' ponticum, with a number of varieties recorded, R. ponticum var. The genus Rhododendron is in the family Ericaceae in the major group Angiosperms (Flowering plants). Click below on a thumbnail map or name for species profiles. Some like partial shade, but be aware that not enough light will cause them to not bloom. Rhododendron Maximum Roseum, or the Rosebay Rhododendron, also called the Great Laurel or Great Rhododendron, is a small tree or large shrub with many trunks. The genus is large and extremely diverse, comprising about 850 species. The leaves may roll up or have spots. baeticum and subsp. Not to be confused with Abigail .Flower Colour : PinkFlowering Time : April Scented : No Ultimate Height : 1.50 metres / 4 feet 11 inchesParentage : Loder's White x calophytum pink formHardiness : -18°C (0°F) Hardy in all but the coldest parts of UK.Group : Compact & Medium Hybrids up to 2m.. The rhododendron flower is very beautiful, when it is still a fresh bloom. A variety with R. catawbiense parentage is usually reliable here, as are the “ironclads.” Chapman’s rhododendron (R. champmanii) is very good for coastal areas. planting rhododendrons. By pruning at this time, the growth cycle of the plant will not be disturbed. sempervirens. } There are 55 known rhododendron species in Borneo and 164 rhododendron species occurring in New Guinea. e='' The adult black vine weevil causes a c-shaped notch in the leaves by feeding on the plant. These beautiful changes in color will occur if the plant is grown in ample sun and moist soil. Rhododendrons come in many varieties, of many different sizes, colors and flower types. Alabama azalea. Rhododendron is a genus of more than 1,000 shrubs and small trees from the heath family, most with large, attention getting flowers. Lacebugs are tiny insects, about a 1/8" with clear lace-like wings. Rhododendron albiflorum. Possibly a form of R. phaeochrysum.Flower Colour : Pale pink, fading to white.Flowering Time : April-May Scented : No Ultimate Height : 1.50 metres / 4 feet 11 inchesParentage : Hardiness : Group : Compact & Medium Species up to 2m.. Rhododendron aganniphum var aganniphum Doshongense Gp KW5863 Any flower terminals not pruned will begin growth a bit earlier than the other blooms, and usually do so by growing a long single shoot. Lacebugs This species is xxamed for f/illiam Purdom, ixx charge of the Ax-x^old Arboretum explorations ixi xioi-thern Chix^a aurixig the years 1909, 1910 and 1911. The P.J.M. The affected branches must then be taken away and destroyed, so as not to re-infect the plant. & E.H.Wilson) H.F.Copeland Rhododendron cinereoserratum P.C.Tam Rhododendron daiyuenshanicum P.C.Tam Rhododendron daiyunicum P.C.Tam Rhododendron farrerae var. Special Foliage. We do not intend The Plant List to be complete for names of infraspecific rank. Rhododendrons are not native to Africa or South America. It is commonly found growing in the mountainous areas of North Carolina. Rhododendron cata… Rhododendron /ˌroʊdəˈdɛndrən/ (from Ancient Greek ῥόδον rhódon "rose" and δένδρον déndron "tree") 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. Rhododendrons are small, reaching heights of only 3 to 6 feet. Cascade azalea. The rhododendron is native to many areas throughout the world, usually occurring in moist places in the Northern Hemisphere. In fact, many years ago, Endi Ostbo, a nurseryman whose nursery was named King of Shrubs, introduced a rhododendron cultivar by that same name. album, a form with white flowers, R. ponticum var. Once the rhododendrons grow larger, and become more 'woody', deer generally leave them alone, but only if they find enough other things to eat. Type of plant (select one): elepidote rhododendron lepidote rhododendron evergreen azalea deciduous azalea vireya (lepidote) other: Rhododendron Books. An … rhododendrons are the result of crosses between R. carolinianum and R. dauricum var. It is the national flower of Nepal, the state flower of Washington and West Virgi… document.write(a+b+c+d+e) Rhododendrons have been called the King of Shrubs for various reasons, but most likely, because of the species with luxuriant evergreen foliage and flower forms that rival those of any plant species. It is a deficiency in iron, and causes the leaves to turn a sickly yellow. Male Named Rhodos. Rhododendrons are heavy flowerers because they never set seed. Rhododendrons can be susceptible to several diseases, including borer damage, major root rot, chlorosis, winter burn, leaf spot, and a twig and stem dieback due to a fungus. This selection has interesting long recurved leaves and dense fawn indumentum on the underside and lovely wooly young shoots. There is some variation in a species at different locations in the wild. It is important to become familiar with the needs of rhododendrons if you want to include them in your landscaping. var a,b,c,d,e,f,g,h,i This genus includes a species that is sometimes placed in the genus Ledum. By familiarizing yourself with just a few of its needs and preferences, you can enjoy the beauty these lovely plants offer. Subordinate Taxa. frequently asked questions. Rhododendrons have fibrous type roots, therefore, they require well-drained soil which has a high concentration of organic material. The Plant List includes a further 418 scientific plant names of infraspecific rank for the genus Rhododendron. Honey Butter Rhododendron Hybrid. Caring for rhododendrons is not difficult, once you are familiar with the plant's specific needs. Dieback can be treated by cutting away the branches a few inches below the distressed areas. An acidic pH can be maintained, to keep rhododendrons healthy, by using a fertilizer product that is especially geared toward plants that prefer acidic soil. Identifying Rhododendrons Kenneth Cox With 900 Species and almost 30,000 named cultivars, identifying rhododendrons is a skilled job which only a handful of people are qualified to do. Of these 613 are accepted species names. Notes on Taxonomy and Nomenclature Top of page The genus Rhododendron is the largest in the Ericaceae family with 1200 species. Belladonna meaning “beautiful lady,” is a designation that lets us know this is a poisonous plant. a+='lto:' There are two subspecies of Rhododendron ponticum, subsp. The taxonomy of Rhododendron lochiae has been a source of confusion in recent years. Rho¬dodendron schlippenbachii, or royal azalea, produces very large and fragrant pink blooms in the spring. Search for a specific plant or plant type you are wishing to add to your beautiful outdoor collection. The Plants Database includes the following 40 species of Rhododendron . This will leave a stippling of yellow or bronze on the leaves. See "Status", "Confidence level", "Source" for definitions. Rhododendron Name "A - Z" Lists Rhododendron Plant Search Deer also seem to avoid rhododendrons with heavy fuzz, or 'indumentum' on the undersides of their leaves. It is essential to prune back every flower terminal. Pinching will encourage multiple branches from the one terminal. They suck sap from the undersides of the leaves, and leave hard, shiny black droppings. The pH in the soil must be lowered, to make it more acidic, by adding sulfur or iron sulfate and working it into the soil near the roots. Rhododendrons are commonly affected by dieback, exhibited by the branches or leaves turning brown, while staying attached to the plant. Most insect problems can be cured with various insecticides, which can be found at a local nursery. The genus Rhododendron includes both rhododendrons and azaleas. The genus Rhododendron is the largest in the Ericaceae family with 1200 species. They originate mostly from the Northern Hemisphere with high concentrations in western China, the Himalayas and Myanmar (Burma). These are primarily included because names of species rank are synonyms of accepted infraspecific names. Tropical rhododendrons occur in southeast Asia and the north of Australia. baeticum and subsp. Dead Heading The new variety, with its rosy pink petals and elongated shape, is a hybrid of two species - Rhododendron tuba and Rhododendron praetervisum, bred by Keith Adams in New Plymouth. Rhododendrons can also become the target of several insect pests, including several different types of weevils, rhododendron borers, and several species of caterpillars. Reference: Judd and Kron (2009). There are up to 750 species – and according to certain estimates this number could be double. Rhododendron, (genus Rhododendron), any of a genus of woody plants in the heath family (Ericaceae), notable for their attractive flowers and handsome foliage. ... Rhododendron Species. problems with rhododendrons. Rhododendrons are members of the Heather family. Although the notched leaves are not attractive, the weevils usually do not cause severe damage to the plant. Growth Habit: large (6 x 6 feet) USDA Zone: 7 Exposure: filtered to full sun Growing Conditions: evenly moist, well drained acidic soils Parentage: ('Romany Chal' x 'Purple Splendour') Primary Color: purple Bloom Time: late-season Comments: Very dark black-purple trusses with white anthers on red leaf stems. The group of plants commonly called azaleas are actually classified by botanists as belonging to the Genus Rhododendron and the name for each type of azalea has both the word “Rhododendron” and the species name, just as with other rhododendrons. Cutting back will make for a future sturdy rhododendron shrub. Anna Rose Whitney Rhodendron Hybrid. fertilising rhododendrons. The status of the 1,961 species names for the genus Rhododendron recorded in The Plant List, are as follows: The status of the 2,379 names (including infraspecific names) for the genus Rhododendron recorded in The Plant List, are as follows: The confidence with which the status of the 1,961 species names recorded in The Plant List for the genus Rhododendron, are assigned as follows: The source of the species name record found in The Plant List for the genus Rhododendron, are as follows: © The Plant List 2010 — 14 pink flowers per truss, with dark blotch. Black Vine Weevil Sun Tolerant. Species Varieties. The rhododendron is native to many areas throughout the world, usually occurring in moist places in the Northern Hemisphere. Rhododendron pruning is usually not needed on most plants, but some plants may need it to retain shape. ponticum, with a number of varieties recorded (Terzioglu et al., 2001). Covered in masses of blue flowers in September in NZ Winter Burn Deer will eat the plants until there is nothing left to save. With a round form and dark green leaves, it is very attractive, especially when the foliage turns almost purplish in color in the autumn. Rhododendron catawbiense, is the state flower of West Virginia. Most are found in China, Japan and neighboring countries; tropical species are found from Southeast Asia to New Guinea and Northern Australia. Admired for their beauty, rhododendrons are popular throughout the world. Spider mites suck sap from the buds and the undersides of the leaves. Dieback The purpose of the Society is to encourage interest in and to disseminate knowledge about rhododendrons and azaleas. The following tables contain the names of some of the species and hybrids that do well in … They may be propagated from seed or cuttings. Since they all include the word Rhododendron in their name, it is frequently abbreviated as R. World's largest display of rhodies in a public garden. Rhodo nurseries outside NZ. To check for spider mites, hold a white piece of paper under an affected branch and tap the plant. Europe and North America have fewer native species. Deer repellent products can be found at your local garden center. There are two subspecies of R.ponticum: subsp. Pruning Rhododendron Tropical rhododendrons occur in southeast Asia and the north of Australia. If pruning back in this manner is done before the plant reaches three feet in height, the need for pruning can be eliminated. The noted naturalist, Sir David Attenborough, has brought attention to Rhododendron ponticum, a species of plant that is quite invasive and destructive to other plants. datasets have provided data to the NBN Atlas for this species.. Browse the list of datasets and find organisations you can join if you are interested in participating in a survey for species like Rhododendron … Rhodos with Female Names. else d=b b='info' … Azzuro Rhododendron Hybrid. The P.J.M. Bloom alert - Rhododendron aurigeranum, anoth. f='Email' if (f) d=f . The word rhododendron comes from the ancient Greek rhódon, meaning 'rose', and déndron, meaning 'tree'. Rhododendron makinoi AGM (best narrow leaf) A stunning plant with compact trusses of pinky white flowers in May and June. Both amaryllis belladonna and hippeastrum are poiAlthough rhododendrons are hardy and easy to care for, there are several problems to watch for. ^ el- ROYAL BOTANIC GARDEN EDINBURGH E00327420 E00327420 The foliage on this large leaved azalea also will turn purple in the springtime, velvety green in summer, and then finally will fade to a pretty yellow in autumn. This flower also appears on the West Virginia state flag. At Singing Tree Gardens Nursery we offer a large variety of wonderful plants. mediocre Diels Rhododendron farrerae var. Native Introduced Native and Introduced. If deer become a problem to the rhododendrons in your area, you will need to either install fencing or put a deer repellent on rhododendrons to protect them. It is also easy for rhododendrons to be suffocated by nearby invasive plants. Several tiny insects will drop down onto the paper which will make them much more visible. b+='namesofflowers.net' In Finland, however, there are only one species (formerly 2 when Labradory tea, Ledum palustre was included in the Rhododendron family). Looking for a particular name of Rhododendron or your favorite color, please don't hesittate to call or email and Ask Ellie! Also, be certain the plants are well watered and mulched before the winter season begins. If you notice a rhododendron plant looking dry and the leaves turning brown, it is suffering from winter burn, which is exposure to the cold winter air. The Plant List includes 1,961 scientific plant names of species rank for the genus Rhododendron. They are generally quite hardy, with colorful, large showy flowers, making them an excellent choice for home landscaping, without requiring too much care. b+='@' Spider Mites There are about 1.000 species , of which about 200 can be grown and planted in Western-Europ and comparable zones of about 7 or higher. species Rhododendron mariesii Name Synonyms Azalea mariesii (Hemsl. Genus: Rhododendron azalea. Rhododendron species are originally growing in Asia, Europe and North-America. Advice. It is a very large genus with about 1200 described species. How to Cite, The Plant List — A working list for all plant species. Sun and shade requirements will vary with each type of rhododendron. PNW woodland setting, tropical conservatory, blue poppy meadow, stumpery & more. This form is from Tsango Gorge, Tibet. Relatively few are native to Europe and North America. Deadheading is the simple act of pinching off the stem of the spent flower. This species of rhododendron actually possesses a compound with antioxidant and fat control properties. Avoid this problem by planting rhododendrons behind other plants or structures that will act as a windscreen. Rhododendron canadense (L.) Britton, Sterns & Poggenb. The table below lists the names of all 317 currently accepted species belonging to Rhododendron subgenus Vireya together with subspecies, varieties and forms.. Click on a highlighted name for more information and photographs of the selected species. The native species are suitable in many areas. Open Tue-Sun. This is even more important when the plant is not yet established. The leaves will appear mottled with yellow or green. Genus: Rhododendron L. Species rhododendrons are rhododendron varieties that grow naturally in the wild. Rhododendrons are not native to Africa or South America. It benefits from staking and is certainly worth growing for it's wonderful foliage. Proposed plant name: (A hybrid cultivar or a selected clone of a species may be named and registered.) Chlorosis This is not completely unheard of, as many other rhododendron species contain toxins, which are not fatal to humans, but which are thought to harm the growth of other nearby plants. There are 55 known rhododendron species in Borneo and 164 rhododendron species occurring in New Guinea. It has also been found that the rhododendron ponticum species contains toxins, even in honey made from its flowers. Relationships: The rhododendron genus includes plants commonly known as azaleas. Both are members of the genus Rhododendron, and have very similar blossoms. Research into the taxonomy of collected specimens proposed that there were in fact two distinct species. In spring or summer, lacebugs will attack rhododendrons, especially those growing in sunnier, rather than shady spots. When a shrub is covered with dried up and dying blooms, it looks unsightly. Rhododendrons, in India, are represented by about 80 species with 10 subspecies and 14 varieties most of which are widely distributed in the Himalayas at altitude ranging from 1500 – 5500 m. Dead heading is the removal of spent blooms from a rhododendron bush. For one thing, rhododendrons thrive in acidic soil, with a pH from 4.5 to 6.0. Rhododendron is a large genus of over 1,000 species but only one occurs naturally in Australia.. Rhododendron alabamense. Mulching is very important, as is watering carefully. Most are evergreen but some are deciduous. A non-native, invasive species. Deer will do immense damage to rhododendrons, especially when the plants are smaller. You should refer instead to the current version of The Plant List. Deer cheiranthifolium a compact variety with narrow and wavy leaves, R. … If a single shoot is noticed, it should be pinched off when new growing tips reach about an inch in length. Chlorosis is a rather common rhododendron problem. The black vine weevil will also do damage to rhododendrons. The best time for pruning is in early spring, before flowers appear. Dieback is caused by several fungi, which enter a weakened area of the plant through either infected soil or tools, or rain. Other rhododendron species are state flowers in India and Pakistan, and the national flower of Nepal. This is a crucial step to take when trying to shape or reshape a plant. Rhododendron 'A W Hardy' Bold foliage on vigorous plant. Rhododendron is a genus of 500 to 900 species and includes both of what we commonly call rhododendrons and azaleas. Rhododendrons are beautiful plants, and an excellent choice for attractive landscaping. It is best to rotate the use of these products, to ensure that the deer never get too familiar with any of them. This is done for several reasons: to keep the plant tidy, prevent the production of seeds, which will save the plant's energy for producing flowers for the following year, and helping in the reduction of diseases and pests. 'P.J.M.' a='