Transferred from the Greek name for Nerium oleander. The leaves are 9–19 cm (3–8 in) long and 2–4 cm (0.75-1.5 in) broad. [65][66], Rhododendrons are extensively hybridized in cultivation, and natural hybrids often occur in areas where species ranges overlap. Plant in mass on 4- to 6-foot centers. 1022. [2], Rhododendron are characterised by having inflorescences with scarious (dry) perulae, a chromosome number of x=13, fruit that has a septicidal capsule, an ovary that is superior (or nearly so), stamens that have no appendages, and agglutinate (clumped) pollen. A sweetly-colored, salmon-pink, ruffled rhododendron with a captivating yellow throat. Larger commercial growers often ship long distances; in the United States, most of them are on the west coast (Oregon, Washington state and California). Encore azaleas were developed by Robert E. “Buddy” Lee, a plantsman from Independence, Louisiana. [73], Some species of rhododendron are poisonous to grazing animals because of a toxin called grayanotoxin in their pollen and nectar. taquetii , is native to Jeju Island , and is a fertile azalea of the relative kind of the "Rhododendron mucronulatum" which is a deciduous broadleaf small shrub of the family Ericaceae. Scientific Name: Rhododendron L. (Ericaceae) [Cultivars] 'Jaci's Pink' Nursery Availability The remaining small subgenus Therorhodion with its two species was left intact. The leaves are 9–19 cm (3–8 in) long and 2–4 cm (0.75-1.5 in) broad. and R. maximum). Rhododendron is a genus of more than 1,000 shrubs and small trees from the heath family, most with large, attention getting flowers.. Scientific Name. The fruit is a dry capsule 15–20 mm (.60-.79 in) long, containing numerous small seeds. Some of the best known species are noted for their many clusters of large flowers. 'Scintillation' was bred by Charles O. Dexter of Sandwich, Massachusetts. Water: Maintain moist soil. 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). The large number of species that were available by the early twentieth century prompted a new approach when Balfour introduced the concept of grouping species into series. Geographic Origin. ABBREVIATION : RHOPER SYNONYMS : Rhododendron nudiflora (L.) Torr. [2] (See schemata under Subgenera) (Table 1. Louisiana Plant ID is an online resource for images and descrptions of Louisiana plants and ecosystems. Information on rhododendrons at the Ericaceae web pages of Dr. Kron at Wake Forest University. Prefers cooler regions but some protection from winter wind is helpful. The word rhododendron comes from the ancient Greek rhódon, meaning 'rose', and déndron, meaning 'tree'.. 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. Plant name. taquetii , is native to Jeju Island , and is a fertile azalea of the relative kind of the "Rhododendron mucronulatum" which is a deciduous broadleaf small shrub of the family Ericaceae. 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". Exceptional foundation plant. Rhododendron maximum is an evergreen shrub growing to 4 m (13 ft), rarely 10 m (33 ft), tall. ‘English Roseum’ is a dense, mound-forming, evergreen rhododendron that typically grows to a mature height of 4-10’ tall and 5-11’ wide. Pacific Rhododendron The Heath Family–Ericaceae Rhododendron macrophyllum D. Don ex G. Don (roe-doe-DEN-dron mak-row-FILL-um) Names: The Pacific Rhododendron is also known as the Coast Rhododendron, California Rhododendron, or California Rosebay. Neither the nature of the corolla (ring of petals) nor other characteristics are sufficiently constant to serve as a means of separating these plants into two distinct genera, although azaleas are typically deciduous while rhododendrons are evergreen. Soil: Well-draining, acidic. The Plants Database includes the following 40 species of Rhododendron . Consequently, the taxonomy has been historically complex. Rhododendron borers and various weevils are major pests of rhododendrons, and many caterpillars will preferentially devour them. 1)Planting month for zone 8: year roundPlanting month for zone 9: year roundPlanting month for zone 10: year roundOrigin: not native to North America Chief amongst these were Maximovicz's Rhododendreae Asiae Orientali[23] and Planchon. Azaleas make up two subgenera of Rhododendron. Flowers are small, about 5 cm across, purplish-pink in bud, opening pale purplish-pink and lightly spotted purplish red, openly funnel-shaped, wavy edges; in somewhat loose ball-shaped clusters with 15 or so flowers. Maximovicz used flower bud position and its relationship with leaf buds to create eight "Sections". Information+photos of hybrids and species. [53], Horticulturally, rhododendrons may be divided into the following groups:[16][54]. The remaining four subgenera contain very few species. In some areas, larger rhododendrons can be pruned to encourage more tree-like form, with some species such as Rhododendron arboreum and R. falconeri eventually growing to 10–15 m or more tall. [82] while in Scotland species are being conserved by the Rhododendron Species Conservation Group.[83]. Salmon-Pink, ruffled white flowers, and the flower juice is also as! In calcium-rich soil up to 6 feet tall called the divisions `` series '' include Phytophthora root rot stem... 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