Genus of flowering plants in the heath family Ericaceae, International Code of Botanical Nomenclature, List of Lepidoptera that feed on rhododendrons, List of Award of Garden Merit rhododendrons, List of Sections in Subgenus Rhododendron, "Sorting out the Genus Rhododendron: A Taxonomic Overview of this Large Complex of Species", "GROPING FOR GROUPING: Rhododendron Taxonomy", "The History of Vireya Rhododendron Culture", "Economic history: Farm-gardening and market gardening", "Infrageneric and Sectional Relationships in the Genus Rhododendron (Ericaceae) Inferred from ITS Sequence Data", "Excerpts from and comments on a paper published by: Loretta Goetsch, Andrew Eckert and Benjamin Hall, University of Washington", "Concerning the Origin and Distribution of Rhododendrons", "Dramatic rescue of couple trapped in rhododendron forest", "Maintaining Healthy Rhododendrons and Azaleas in the Landscape", "India has a 'wine country'? Vireya rhododendrons are too lovely to lose. 杜鵑花在臺灣主要分佈在北部，陽明山國家公園內多為日治時期引入的平戶杜鵑、皋月杜鵑、西洋杜鵑等品種 。 目前宜蘭等縣市也廣植杜鵑花。 台灣南部的大武杜鵑及丁香杜鵑為原生種。 及分布全島生長於樹上的著生杜鵑，另有原生種玉山杜鵑。. Rhododendron subsp. Rhododendron subgenus Rhododendron is a subgenus of the genus Rhododendron.With around 400 species, it is the largest of the eight subgenera (more recently reduced to five) containing nearly half of all known species of Rhododendron and all of the lepidote (scales on the underside of the leaves) species. It is the hybrids of Rhododendron tuba that are widely grown, and this Vireya type and typifies the variety. 2011. Show off your favorite photos and videos to the world, securely and privately show content to your friends and family, or blog the photos and videos you take with a cameraphone. Vireya Rhododendrons. Consequently, the taxonomy has been historically complex.. I have a Vireya rhodo Tropical Glow in a container plant in a semi shaded area and is about 1 m high. [79] (Fayaz). R. ponticum is difficult to eradicate, as its roots can make new shoots. Discover (and save!) Of the three minor subgenera, all in C, two were discontinued. Now Vireya rhododendrons are becoming available throughout the year as more nurseries and gardeners are becoming aware of them. The History of Vireya Rhododendron Culture. It is a shrub that grows to 3 m in height, with leaves that are broadly elliptic or sub-ovate-elliptic, 40–95 × 25–53 mm in size. Rhododendrons have not been found in South America or Africa. The nineteenth-century American poet and essayist Ralph Waldo Emerson in 1834 wrote a poem titled "The Rhodora, On Being Asked, Whence Is the Flower", In Joyce's Ulysses, rhododendrons play an important role in Leopold and Molly's early courtship: Molly remembers them in her soliloquy – "the sun shines for you he said the day we were lying among the rhododendrons on Howth head in the grey tweed suit and his straw hat the day I got him to propose to me". Rhododendron arboreum is also the state tree of the state of Uttarakhand, India. In Argent's (2006) treatment of Vireya as a subgenus, he included seven sections, with Euvireya consisting of five subsections,[6] but this is not supported by phylogenetic analysis. ADVERTISING If you’re not quite sure about the tropical rhododendrons and how to grow them, then get acquainted with the experts by joining the Hawaii Chapter of the American Rhododendron Society. The discontinued subgenera are Pentanthera, Tsutsusi, Candidastrum and Mumeazalea, while a new subgenus was created by elevating subgenus Azaleastrum section Choniastrum to subgenus rank. Information+photos of hybrids and species. The tropical rhododendrons (sect. Other significant areas of diversity are in the mountains of Korea, Japan and Taiwan. Backfill hole with a mix of your soil, Kings Compost and Sheep Pellets, leaving space to plant your vireya. Rhododendron section Vireya (vireyas) is a tropical group of Rhododendron species, numbering about 300 in all. The tropical rhododendrons (sect. 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. [29][30] Most of the Balfourian series are represented by Sleumer as subsections, though some appear as sections or even subgenera. Of the first two of these, the species are predominantly found in the area of the Himalayas and Southwest China (Sino-Himalayan Region). The species in New Guinea are native to subalpine moist grasslands at around 3,000 metres above sea level in the Central Highlands. Subgenus Pentanthera (deciduous azaleas) with its four sections was dismembered by eliminating two sections and redistributing the other two between the existing subgenera in clades B (Hymenanthes) and C (Azaleastrum), although the name was retained in section Pentanthera (14 species) which was moved to subgenus Hymenanthes. We place the more tender vireyas with greater care, on the margins where they get plenty of light but adjacent overhead cover will give them protection from most frost damage. [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. Rhopalostylis sapida (Nikau) This native palm is truly iconic. The Species of Rhododendron[26] referred to this series concept as the Balfourian system. giganteum, reported to 30 m (100 ft) tall. Found in that area an outstanding specimen Rhododendron loranthiflorum has been named after the New York guru Sri Chinmoy.[9]. Rhododendron tuba is a tropical Vireya type rhododendron that has its origins in New Guinea. Xenophon described the odd behaviour of Greek soldiers after having consumed honey in a village surrounded by Rhododendron ponticum during the march of the Ten Thousand in 401 BCE. [1] [2] [3] En 2005 se redujo a una sección del subgénero Azaleastrum. [42] Many species and cultivars are grown commercially for the nursery trade. I would like to know when is the best time to prune back the plant and how, so it can continue to bloom. [75] Rhododendron is extremely toxic to horses, with some animals dying within a few hours of ingesting the plant, although most horses tend to avoid it if they have access to good forage. & Hemsl. Major speciation accompanied the dispersal of Vireya Rhododendrons (Ericaceae, Rhododendron sect. (13 druhů; Himaláje a přilehlé hory) ( Pseudovireya (CBClarke) Argent, zvednutý z Vireya) Rhododendron L. (149 druhů v 25 podsekcích; mírná až subarktická severní polokoule) Subgenus Tsutsusi (C) was reduced to section status retaining the name, and included in subgenus Azaleastrum. Rhododendron borers and various weevils are major pests of rhododendrons, and many caterpillars will preferentially devour them. Čeština; Deutsch; Français; Italiano; Nederlands; Polski; Português; Русский [11], Although Rhododendrons had been known since the description of Rhododendron hirsutum by Charles de l'Écluse (Clusius) in the sixteenth century, and were known to classical writers (Magor 1990), and referred to as Chamaerhododendron (low-growing rose tree), the genus was first formally described by Linnaeus in his Species Plantarum in 1753. Subgenera Rhododendron, they are tropical shrubs originating from se Asia to Australia will preferentially devour.! 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