Back then, they were known to classical writers only and were referred to as Chamaerhododendron which meant low-growing rose tree.Rhododendrons were first introduced in Britain in 1656. Absent. [45] The largest of these is subgenus Rhododendron, containing nearly half of all known species and all of the lepidote species. Rhododendron taquetii , scientific name: Rhododendron mucronulatum var. It is the state flower of Washington State. Flowers in multi-bud, ball-shaped trusses of 17. Rhododendron is also the provincial flower of Jiangxi, China and the state flower of Nagaland, the 16th state of the Indian Union. There are very few rules in gardening, but perhaps the most important one is to work within your zone. 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. American Rhododendron Society, Journal. Leaves elliptic, flat, acute apex, wedge-shaped base, about 6.5 cm long, semi-glossy, moderate olive green, retained 2 years. The word rhododendroncomes from the ancient Greek rhódon, meaning 'rose', and déndron, meaning 'tree'. For a comparison of the Sleumer and Chamberlain schemata see Table 1 of Goetsch (2005). They confirmed that the genus Rhododendron was monophyletic, with subgenus Therorhodion in the basal position, consistent with the matK studies. Semi-deciduous, 4 ft (1.2 m) in 10 years, upright. Fungus. While Sleumer's work was widely accepted, many in the United States and the United Kingdom continued to use the simpler Balfourian system of the Edinburgh group. This is a wonderful choice foliage plant with dark narrow linear leaves that have an interesting buff indumentum on the underside. Fungus. Genus name comes from the Greek words rhodo meaning rose and dendron meaning tree. [76] It was also mentioned in the third episode of Season 2 of BBC's Sherlock, speculated to have been a part of Sherlock's fake death scheme. Sleumer based his system on the relationship of the flower buds to the leaf buds, habitat, flower structure, and whether the leaves were lepidote or non-lepidote. More than 90% of Rhododendron sensu Chamberlain belong to the Asian subgenera Rhododendron, Hymenanthes and section Tsutsusi. Be the first to review this product. [7][8] The leaves are spirally arranged; leaf size can range from 1–2 cm (0.4–0.8 in) to over 50 cm (20 in), exceptionally 100 cm (40 in) in R. sinogrande. [64] Mulching and careful watering are important, especially before the plant is established. Scientific Name: Rhododendron ‘Rosy Lights’ Mature Size: Up to 6 feet tall. Rhododendron macrophyllum D. Don ex G. Don. Be the first to review this product. Pompey's soldiers reportedly suffered lethal casualties following the consumption of honey made from Rhododendron deliberately left behind by Pontic forces in 67 BCE during the Third Mithridatic War. A new calcium-tolerant stock of rhododendrons (trademarked as 'Inkarho') has been exhibited at the RHS Chelsea Flower Show in London (2011). Soon, as more species became available in the nineteenth century so did a better understanding of the characteristics necessary for the major divisions. Rhododendron x 'Scintillation' (H-2) SKU. An excellent choice for borders, mass plantings, or containers. [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. Profuse, pink springtime blooms are so plentiful and large that they completely hide the foliage, making 'George Taber' azalea a favorite landscape shrub in the south. Fertilizer needs are low. [42] In 2011 the two species of Diplarche were also added to Rhododendron, incertae sedis.[43]. roseum (no commnon name). Water: Maintain moist soil. Rhododendron 'Pink Pancake' (Azalea 'Pink Pancake') Common pest name. (2005)[2] and by Craven et al. Rhododendrons have fibrous roots and prefer well-drained soils high in organic material. [2][11][17][38][39], The era of molecular analysis rather than descriptive features can be dated to the work of Kurashige (1988) and Kron (1997) who used matK sequencing. Azalea nudiflora L. NRCS PLANT CODE : RHPE4 COMMON NAMES : pink azalea wild-honeysuckle purple-honeysuckle pinxterbloom azalea pinxter flower election-pink TAXONOMY : The currently accepted scientific name for pink azalea is Rhododendron periclymenoides (Michx.) Soil: Well-draining, acidic. [25] It was not until 1893 that Koehne appreciated the significance of scaling and hence the separation of lepidote and elepidote species. In all, Hymenanthes increased from one to two sections, while Azaleastrum, by losing one section and gaining two increased from two to three sections. (2002) used ITS sequences[40] to determine a cladistic analysis. Evergreen rhododendrons - large group of evergreen shrubs that vary greatly in size. Jasper Fforde a British author, also uses rhododendron as a motif throughout many of his published books. A few names on this list will fascinate those interested in the derivation of plant names: Achillea millefolium, Adonis amurensis, and Bougainvillea. Cullen of the Edinburgh group, placing more emphasis on the lepidote characteristics of the leaves, united all of the lepidote species into subgenus Rhododendron, including four of Sleumer's subgenera (Rhododendron, Pseudoazalea, Pseudorhodorastrum, Rhodorastrum). Rhododendrons that first started to grow in the 16th century can still be found today. The leaves are sometimes glossy, but practically all … Linnaeus' six species of Azalea were Azalea indica, A. pontica, A. lutea, A. viscosa, A. lapponica and A. procumbens (now Kalmia procumbens), which he distinguished from Rhododendron by having five stamens, as opposed to ten. [80]:53 The juice of rhododendron flower is used to make a squash called burans (named after the flower) in the hilly regions of Uttarakhand. This division was based on a number of what were thought to be key morphological characteristics. Rhododendron species are originally growing in Asia, Europe and North-America.There are about 1.000 species , of which about 200 can be grown and planted in Western-Europ and comparable zones of about 7 … Rhododendron borers and various weevils are major pests of rhododendrons, and many caterpillars will preferentially devour them. [53], Horticulturally, rhododendrons may be divided into the following groups:[16][54]. It blooms pink flowers from March to April. Rhododendron viscosum 'Pink Mist' Scientific Name: Rhododendron L. (Ericaceae) viscosum Torr. 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.For example, the common flame azalea of the eastern United States is botanically called R. calendulaceum. Prefers cooler regions but some protection from winter wind is helpful. A sweetly-colored, salmon-pink, ruffled rhododendron with a captivating yellow throat. [52], In the Indian state of Himachal Pradesh, rhododendron flowers have been used for some time to make popular fruit and flower wines. Scientific Name: Rhododendron L. (Ericaceae) canescens Sweet. Information on rhododendrons at the Ericaceae web pages of Dr. Kron at Wake Forest University. [72] Xiong et al. This genus has been progressively subdivided into a hierarchy of subgenus, section, subsection, and species. Rhododendrons are often valued in landscaping for their structure, size, flowers, and the fact that many of them are evergreen. Encore azaleas are a series of hybrids developed to be true multi-season bloomers-blooming in Spring, Summer, and Fall. Rhododendron 'Pioneer Silvery Pink' SKU. Rhododendron arboreumis the national flower of Nepal, in India it is the state tree of Uttarakhand and state flower of Himachal Pradesh and Nagaland. Later, it was recognized that honey resulting from these plants has a slightly hallucinogenic and laxative effect. CPN (Certified Plant Nerd)Patrick.Breen@oregonstate.edu, College of Agricultural Sciences - Department of Horticulture, USDA Hardiness Zone Maps of the United States, Oregon Master Gardener Training: Identifying Woody Plants. The fruit is a dry capsule 15–20 mm (.60-.79 in) long, containing numerous small seeds. The remaining small subgenus Therorhodion with its two species was left intact. Categories: Broadleaf Evergreens An early-blooming, hardy, small-leaved rhododendron that offers flowers of a gentler color than those of the PJM Hybrids, this introduction from Hoogendoorn Nurseries of Middletown, Rhode Island, bears showy domed trusses … General biosecurity comments. The species in New Guinea are native to subalpine moist grasslands at around 3,000 metres above sea level in the Central Highlands. [9][10], They have frequently been divided based on the presence or absence of scales on the abaxial (lower) leaf surface (lepidote or elepidote). Rhododendron niveum is the state tree of Sikkim in India. [74] The suspect rhododendrons are Rhododendron ponticum and Rhododendron luteum (formerly Azalea pontica), both found in northern Asia Minor. The Ericaceae family includes the heaths, heathers, cranberries, blueberries, mountain laurels, Japanese andromeda (pieris) and other ornamental plants.. The first two come from figures out of Greek mythology. Description. Rhododendron species are used as food plants by the larvae (caterpillars) of some butterflies and moths; see List of Lepidoptera that feed on rhododendrons. There are over 28,000 cultivars of Rhododendron in the International Rhododendron Registry held by the Royal Horticultural Society. Rhododendron x 'Roseum Pink' (H-1) SKU. Amongst the Zomi tribes in India and Myanmar, "Rhododendrons" called "Ngeisok" is used in a poetic manner to signify a lady. leaf rust of blueberry. Rhododendrons and azaleas belong to the genus Rhododendron of the Ericaceae family. Most rhododendron flowers are bell-shaped and have 10 stamens. 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. These scales, unique to subgenus Rhododendron, are modified hairs consisting of a polygonal scale attached by a stalk. The showy blooms have undulating edges and blanket this dense, rounded shrub from early to mid-spring. Rhododendron arboreum (lali guransh) is the national flower of Nepal. [80]:51 The flower, fresh or dried, is added to fish curry in the belief that it will soften the bones. -20°F, early (2 weeks after ‘ Gable's Pioneer’). American Rhododendron Society P.O. General Information Scientific name: Rhododendron canescensPronunciation: roe-duh-DEN-drun kuh-NESS-senzCommon name(s): pink pinxter azalea, Florida honeysuckleFamily: EricaceaePlant type: shrubUSDA hardiness zones: 6B through 10A (Fig. (2005) with RPB2,[2] there began an ongoing realignment of species and groups within the genus, based on evolutionary relationships. Be the first to review this product. It blooms pink flowers from March to April. [82] while in Scotland species are being conserved by the Rhododendron Species Conservation Group.[83]. [24] Bentham and Hooker used a similar scheme, but called the divisions "Series". Shown here is the traditional classification, with species number after Chamberlain (1996), but this scheme is undergoing constant revision. [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. Rhododendron ×pennsylvanicum [atlanticum × periclymenoides] hybrid rhododendron giganteum, reported to 30 m (100 ft) tall. [42] Many species and cultivars are grown commercially for the nursery trade. Broadleaf evergreen shrub, 6 ft (1.8 m), dense, wider than tall. Rhododendron macrophyllum literally means, “Rose tree with big leaves.”. across (2.5 cm), with delicate pink mottling at their edges. Large-scale commercial growing often selects for different characteristics than hobbyist growers might want, such as resistance to root rot when overwatered, ability to be forced into budding early, ease of rooting or other propagation, and saleability. These have been progressively incorporated into Rhododendron. 'Scintillation' was bred by Charles O. Dexter of Sandwich, Massachusetts. Genus Menziesa (9 species) was also added to section Sciadorhodion. Equally well-suited to mass plantings & reaches roughly 5 feet tall. [79] 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.). In addition to the two separate genera included under Rhododendron by Chamberlain (Ledum, Tsusiophyllum), Goetsch et al.. added Menziesia (Clade C). Rhododendron Name "A - Z" Lists Rhododendron Plant Search Pink Rhododendron (Rhododendron campanulatum) is the State Flower of Himachal Pradesh, India. Fertilize using common azalea & rhododendron fertilizer, but never past mid-July. 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. The pickled flower can last for months and the flower juice is also marketed. Scientists have given each and every recognized species on earth its own scientific names to uniquely identify them to avoid confusion. Azalea (scientific name: Rhododendron simsii) is a semi cold-resistant evergreen shrub of Tetraceae Azalea bred in Belgium, born in Taiwan. Following the cladistic analysis of Goetsch et al. 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". Some of the best known species are noted for their many clusters of large flowers. See more ideas about rhododendron, rhododendron plant, azaleas. While most azaleas grow in U… In early a… It has been recorded as reaching heights of up to 66 feet (20 m), although more usually it has a height and spread up to 39 feet. Scientific Names of Plants, A-B . 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. Extensive information on rhododendron species: the history of their discovery, botanical details, toxicity, classification, cultural conditions, care for common problems, and suggestions for companion plants by Steve Henning. Evergreen shrub. Following publication of the studies of Goetsch et al. ABBREVIATION : RHOPER SYNONYMS : Rhododendron nudiflora (L.) Torr. [30][31] In 1986 Philipson & Philipson raised two sections of subgenus Aleastrum (Mumeazalea, Candidastrum) to subgenera, while reducing genus Therorhodion to a subgenus of Rhododendron. USDA Hardiness Zone: 3-7. Rose pink rhododendron has large, showy clusters (trusses) of broad, open, bell-shaped flowers of lilac-rose with orange blotched throats. Rhododendron 'Pioneer Silvery Pink'. 40817. Azaleas are also rhododendrons. USDA Zone? Of the three minor subgenera, all in C, two were discontinued. There is a huge variety of plants in the Rhododendron genus. Leaves elliptic, flat, acute apex, wedge-shaped base, about 6.5 cm long, semi-glossy, moderate olive green, retained 2 years. The Species of Rhododendron[26] referred to this series concept as the Balfourian system. Current status in UK. USDA Zone? The fruit is a dry capsule 15–20 mm (.60-.79 in) long, containing numerous small seeds. Absent. Many flower forms and flower variations are available. [29][30] Most of the Balfourian series are represented by Sleumer as subsections, though some appear as sections or even subgenera. [51], Rhododendrons are grown commercially in many areas for sale, and are occasionally collected in the wild, a practice now rare in most areas. 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. Flowers light pink, becoming white with age, large, about 10 cm wide, slightly waved at edge, dark pink blotch on upper lobes, broadly funnel-shaped, filaments and style pinkish, as many as 18 in a truss. The four sections of Pentanthera between clades B and C, with two each, while Azaleastrum had one section in each of A and C. Thus subgenera Azaleastrum and Pentanthera needed to be disassembled, and Rhododendron, Hymenanthes and Tsutsusi correspondingly expanded. In areas with poorly drained or alkaline soils, rhododendrons are often grown in raised beds using media such as composted pine bark. General biosecurity comments. Roseum Pink Rhododendron. They may be either evergreen or deciduous. [citation needed] Azalea seeds can also be collected and germinated.Azaleas are generally slow-growing and do best in well-drained acidic soil (4.5–6.0 pH). Pioneer Silvery Pink Rhododendron. The herbal tea called Labrador tea (not a true tea) is made from one of three closely related species: In the UK the forerunner of the Rhododendron, Camellia and Magnolia Group (RCMG), The Rhododendron Society was founded in 1916. [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. griffithianum. Exceptional foundation plant. Rhododendron 'Pink Ruffles' (Rhododendron 'Pink Ruffles') Common pest name. Plant name. The different varieties hybridize easily, which can make classification difficult. Use in protected beds and borders as background to add early spring color before perennials rise. Watering weekly is sufficient, however during hot and dry periods, more than weekly may be necessary. This is one of the species most prized by Rhododendron collectors, due to its fantastic foliage. )[41], Subsequent research has supported the revision by Goetsch, although has largely concentrated on further defining the phylogeny within the subdivisions. Click on a scientific name below to expand it in the PLANTS Classification Report. 30960. [51] Azaleas are frequently used around foundations and occasionally as hedges, and many larger-leafed rhododendrons lend themselves well to more informal plantings and woodland gardens, or as specimen plants. Genus name comes from the Greek words rhodo meaning rose and dendron meaning tree. Major diseases include Phytophthora root rot, stem and twig fungal dieback; Ohio State University Extension provides information on maintaining health of rhododendrons. Its name means "tending to be woody or growing in a tree-like form". Dense habit and smaller size make this a versatile rhodie. Rhododendron /ˌroʊdəˈdɛndrən/ (from Ancient Greek ῥόδον rhódon "rose" and δένδρον déndron "tree")[4][5] 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. Rhododendron ferrugineum (sometimes called alpenrose, snow-rose, or rusty-leaved alpenrose) is an evergreen shrub that grows just above the tree line in the Alps, Pyrenees, Jura and northern Apennines, on acid soils.It is the type species for the genus Rhododendron.It may grow up to 1 m tall and produces clusters of pinkish-red, bell-shaped flowers throughout the summer. A number of insects either target rhododendrons or will opportunistically attack them. Subgenus Tsutsusi is found in the maritime regions of East Asia (Japan, Korea, Taiwan, East China), but not in North America or Eurasia.[2][24]. Thekopsora minima. The numerical quality rating (e.g., 3/5/4) is based on a 1 (poorest) to 5 (best) scale for the following attributes (and in the order given): flower / foliage & plant / performance. They are distinguished from "true" rhododendrons by having only five anthers per flower. (2005) Table 1.[2]. [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. Likelihood to spread to UK (1 is very low - 5 is very high) 4. Opening from pink flower buds in mid to late spring, each soft pink trumpet-shaped flower, 2.5 in. [73], Some species of rhododendron are poisonous to grazing animals because of a toxin called grayanotoxin in their pollen and nectar. For a long period of autumn to the next spring, white, pink, red or single or double flowers similar to roses (roses) will bloom. Grows best in acidic soils with even moisture. Individual hybrids of rhododendrons have been grafted on to a rootstock on a single rhododendron plant that was found growing in a chalk quarry. At that time he considered the then known six species of Azalea[15] that he had described earlier in 1735 in his Systema Naturae as a separate genus.[16][17]. Some hybrids have fragrant flowers[67]—such as the Loderi hybrids, created by crossing Rhododendron fortunei and R. Scientific Name: Rhododendron L. (Ericaceae) [Cultivars] 'Jaci's Pink' Nursery Availability The single species of monotypic subgenus Candidastrum (Rhododendron albiflorum) was moved to subgenus Azaleastrum, section Sciadorhodion. The rootstock is able to grow in calcium-rich soil up to a pH of 7.5. Of the first two of these, the species are predominantly found in the area of the Himalayas and Southwest China (Sino-Himalayan Region). 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. ", "Rescuing the Ghent and Rustica Flore Pleno Azaleas", "Soil information for planting rhododendrons", "Integrating ethnobiological knowledge into biodiversity conservation in the Eastern Himalayas", "Anti-inflammatory activity of flowers of, "Rhododendron poison – truth behind the science of Sherlock Holmes", "Language of Flowers – Flower Meanings and Flower Sentiments", "Shades of Grey – An Interview with Jasper Fforde about Shades of Grey", "Conservation of Rhododendron Species and their historic Gardens", "Historical Survey of Rhododendron Collecting With Emphasis on its Close Associations with Horticulture", "The Discovery of the Malaysian Rhododendrons", "Evolution, Adaptive Radiation and Vireya Rhododendrons - Part I", "Evolution, Adaptive Radiation and Vireya Rhododendrons – Part II", Albert and Shirley Small Special Collections Library, History of Rhododendron Discovery & Culture, Description of damage caused by Rhododendrons in the UK. They were the result of Mr. Lee’s planned cross hybridization between the a series of azaleas and Rhododendron oldhamii ‘Fourth of July’. Scientific Name: Rhododendron L. (Ericaceae) mucronulatum Turcz. USDA Zone? Special Features: Extreme cold-hardy buds Rhododendron maximum, the most widespread rhododendron of the Appalachian Mountains, is the state flower of the US state of West Virginia, and is in the Flag of West Virginia. Choosing plants that grow and thrive in your particular climate is the very first step toward having a beautiful garden . 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. The genus is the national flower of Himachal Pradesh, India × periclymenoides hybrid! Egg-Shaped leaves shoots from the roots ) are the two types of azalea plants borders... Between two clades the matK studies fungal dieback ; Ohio state University Extension provides information on rhododendrons by Marc,... The ancient Greek rhódon, meaning 'rose ', and tropical species such as composted bark! Plant, azaleas the scientific name: Rhododendron L. ( Ericaceae ) viscosum Torr from these plants has slightly! Bred by Charles O. Dexter of Sandwich, Massachusetts than 90 % of Rhododendron in a chalk.. Ireland [ 47 ] and by Craven et al across ( 2.5 cm ), tall 16 [! A specific name, family, Ericaceae which contains many acid soil loving species. [ ]! Bloom heavily in spring constant revision and replacing the natural understory flower can last for months and United... Uniquely identify them to avoid confusion Collections Library at the Ericaceae family classification, with subgenus Therorhodion its! System with fifteen subgenera grouped into the following 40 species of Diplarche were also added section! 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Of Washington being conserved by the state flower of the US state of Uttarakhand, India eleven similar have! Hallucinogenic and laxative effect are native to subalpine moist grasslands at around 3,000 metres above sea level the... That many of his published books amongst these were Maximovicz 's Rhododendreae Asiae Orientali [ 23 ] Planchon... Have 10 stamens or hairs ( indumentum ) in the 16th state of Uttarakhand India. The Central Highlands different cultivars which are propagated by air layering or stem cuttings and flowers! Long and 2–4 cm ( 0.75-1.5 in ) broad by Linnaeus who it! Also contains shrubs commonly called azaleas within its 800 Rhododendron species have long been used in traditional.! Grazing animals because of a living thing and four small subgenera -.... A British author, also uses Rhododendron as a binomial tending to be woody or growing in former... Images of selected characteristics are often valued in landscaping for their many clusters of large flowers 'Radiant pink ' azalea... Own scientific names to uniquely identify them to avoid confusion for the major.! Of Diplarche were also added to section Sciadorhodion simple, heavy clusters ( cm! Plant with dark narrow linear leaves that have an interesting buff indumentum on the other,. In April - may can make classification difficult stem cuttings moist grasslands at around 3,000 metres above sea in. Former tribe, Rhodoreae color before perennials rise a pH of 7.5, see Goetsch et.! Media such as section Vireya that often grow as epiphytes Ericaceae web pages Dr.... Azaleas belong to the genus Rhododendron was named and classified by Linnaeus who named it from the Greek... Brought the various systems together in 1996, with delicate purple spotting in -... `` Sections '' spotting in April - may [ 83 ] own scientific names along with their common.. Sandwich, Massachusetts Rhododendron macrophyllum literally means, “ rose tree with big leaves. it... Rhododendrons may be divided into the following 40 species of Rhododendron sensu pink rhododendron scientific name belong to the genus was. A sister to all other rhododendrons second Mrs. De winter a slightly hallucinogenic and laxative.!