Rhododendron control is a key element in nature conservation in those areas. Shinners var. Prized for its remarkably pretty flowers, multiple award-winning Rhododendron 'Scintillation' is a medium-sized, free-flowering, evergreen shrub which produces large rounded trusses of 11 to 15 soft pink flowers. Genus: Rhododendron. indicates you have reached the lowest level of the tree, click on the name at this level to bring up a description of the species. Rhododendron 'Olga Mezzitt' (Rhododendron 'Olga Mezzitt') Common pest name. [8], Suckering of the root, together with its abundant seed production, has led to it becoming an invasive species over much of western Europe and in parts of New Zealand. 'Conleb', sold under the trade name of ENCORE AUTUMN EMBERS, was found as a seedling in a planned cross between Rhododendron 'Watchet' as the seed parent and Rhododendron oldhamii 'Fourth of July' as the pollen parent. At the species level, however, the sampling covers less than 50% of the extant diversity. Our phylogeny adequately represents all subgenera and sections and almost all subsections (∼95%) of Rhododendron (Supporting Information Figure S9). [7], In some parts of the world, a controlled dosage of the honey can be taken to induce hallucinations for spiritual or psychological purposes. Scientific pest name. [citation needed] It was introduced to Britain as an ornamental shrub in 1763, and later planted as cover for game birds. Azaleas are in the deciduous class. Northstar Tart Cherry. Statistics. Scientific Name Genus: Rhododendron. Trees-Acacia. Pink flower buds. 'Lavender Girl' is a deciduous hybrid azalea (Pinxterbloom type) that is noted for its fragrant flowers and its ability to bloom in shade (many deciduous azaleas do not perform well in shade). Type. Yellow Wild Indigo. CLF-CLF-CLF000395 Herbier. Rhododendron is the common and genus name for a large and diverse group of woody shrubs and small (rarely large) trees in the flowering plant family Ericaceae. eglandulosum Seymour It is the type species for the genus Rhododendron. The website also provides access to a database and images of herbarium specimens found at the University of South Florida and other herbaria. This is in contrast to Rhododendron hirsutum, which has no such brown colouring, has hairy edges to the leaves and grows over limestone. There are 8 types of Rhododendrons. Rhododendron arboreum Rhododendron arboreum flower at Mukurthi National Park Scientific classification Kingdom: Plantae: Angiosperms: Eudicots: Asterids Order: Ericales Family: Ericaceae Genus: Rhododendron Subgenus: Hymenanthes Species: R. arboreum Binomial name Rhododendron arboreum Sm. While most azaleas grow in U… Its scientific name is Rhododendron Ponticum subsp. Classification. Scientific Plant Names; Glossary of technical terms; USDA Hardiness Zone Maps of the United States; Sunset's Climate Zones ; References; Oregon Master Gardener Training: Identifying Woody Plants; Rhododendron 'Pink Pearl' Rhododendron 'Pink Pearl' Common name: Pink Pearl Rhododendron. Forest rose leaves are almost as hard and oval as a skin. Preferred name: Rhododendron ; Authority: Linnaeus ; Other scientific names. CLF-CLF-CLF209095 Herbier. ponticum", "Infraspecific Taxon Details : Rhododendron ponticum var. subgenus Hymenanthes. Family Name: Ericaceae. Fruits + Chicago Hardy Fig. In the spring, after the cherry blossoms are scattered, it will be the main character of the street trees. Serrano Pepper . (2000). It is now considered to be an invasive species.[6]. A study[12] in the journal Functional Ecology also showed that invasive rhododendron nectar was toxic to European honeybees (Apis mellifera), killing individuals within hours of consumption. 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 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. Transferred from the Greek name for Nerium oleander. Identification Notes. "Pontic Rhododendron" flowers (or Common Rhododendron) in St. Gallen, Switzerland. R. ponticum flower. The scientific name of Dwarf Rhododendron is the botanical name or formal name. General biosecurity comments. Home. Type: Broadleaf. Scientific Name of Dwarf Rhododendron and Nectarine is used by scientists worldwide. Rhododendron canadense Scientific classification Kingdom: Plantae: Angiosperms: Eudicots: Asterids Order: Ericales Family: Ericaceae Genus: Rhododendron Subgenus: Pentanthera Section: Rhodora Species: R. canadense Binomial name Rhododendron canadense Torr. Texas Redbud. 149 documents correspondent aux critères suivants : MNHN - Vascular plants - Nom scientifique: Rhododendron hirsutum, Rhododendron hirsutum. Scientific Name of Dwarf Rhododendron and Nectarine is used by scientists worldwide. Transferred from the Greek name for Nerium oleander . RHNUG: Rhododendron nudiflorum (L.) Torr. Family Ericaceae. Texas Redbud. It may grow up to 1 m tall and produces clusters of pinkish-red, bell-shaped flowers throughout the summer. Pratia. Rhododendron arboreum Rhododendron arboreum flower at Mukurthi National Park Scientific classification Kingdom: Plantae: Angiosperms: Eudicots: Asterids Order: Ericales Family: Ericaceae Genus: Rhododendron Subgenus: Hymenanthes Species: R. arboreum Binomial name Rhododendron arboreum Sm. Big leaf Maple. Vegetables + Lamb's Lettuce. This genus also contains shrubs commonly called azaleas within its 800 Rhododendron species and thousands of hybrids. Big leaf Maple. In contrast the buff-tailed bumblebee (Bombus terrestris) was not affected by the rhododendron nectar. In the British Isles, it colonises moorlands, uplands, shady woodlands (alongside escaped laurels and the native holly) and in areas of acid soils, often in shaded areas. A cultivar's scientific name is usually written as genus, species, cultivar, with the cultivar name set off in quotes; for example, the "George L. Taber" azalea is most … It can be found feeding on Rhododendrons (also introduced) in Southern England. The common name of this plant in Spanish is azalea. Its scientific name is Rhododendron Ponticum subsp. Meanwhile, Quercus (oak) and Rhus (sumac) grace our yards with wonderful fall color. Trees-Acacia. Genus Rhododendron subgenus Azaleastrum subgenus Candidastrum. Milne, R. I., & Abbott, R. J. Rhododendron hirsutum L. (CJBN-NCY-NCY003822) CJBN-NCY-NCY0040819. CLF-CLF-CLF209097 Herbier. Light Needs. subarcticum × lapponicum] hybrid rhododendron Fruits + Chicago Hardy Fig. Rhododendron maximum, commonly called rosebay rhododendron or great laurel, is a large, upright, loose, multi-stemmed, late-blooming, evergreen shrub that is native to North America from Ontario and Nova Scotia south to Ohio, Alabama and Georgia with a concentration of plants in the southern Appalachian Mountains where it typically grows in dense thickets which dominate the understory in … [9] Where the two species co-occur (usually on soils of intermediate pH), the hybrid Rhododendron × intermedium may occur; as its name suggests, it is intermediate in form between the two parental species. Texas Redbud. Scientific Name; AZNU: Azalea nudiflora L. RHNU3: Rhododendron nudiflorum (L.) Torr. Current status in UK. Bees became paralysed and exhibited excessive grooming or other distress behaviours after feeding on Rhododendron nectar, and ate less food than bees fed a control nectar. Rhododendron nivale Hook.f. Azaleas are also rhododendrons. The scientific name for a leaf is a leaf. Perennial Flowers + Moneyplant . - Buy this stock photo and explore similar images at Adobe Stock Yellow Wild Indigo. Species Epithet: maximum. Rhododendron ponticum subsp. Baeticum, native to Spain and Portugal. © 2013 | Site Feedback |; University of Florida | ; IFAS |; 1549 W.M. An excellent choice for borders, mass plantings, or containers. The roots readily send up suckers from below the graft, often allowing it to overtake the intended grafted rhododendron. The main purpose of having a scientific name is to have a same name accepted and used worldwide. Rhododendron arboreum, the tree rhododendron, also known as Burans or Laligurans or … It has also been introduced to Madeira, India, Belgium, England, France and Ireland. The genus Rhododendron is divided into several subgenera, sections and subsections. Family Ericaceae . Scientific Name: Rhododendron maximum. Leaves alternate, simple, heavy textured, glossy medium green, 15 x 5 cm. Pratia. Rhododendron speciosum Salisb. The fruit is a dry capsule 1.5 to 2.5 cm (0.59 to 0.98 in) long, containing numerous small seeds. Scientific name is the name conforming to the International Code of Nomenclature for algae, fungi, and plants (ICN). A large number of cultivated rhododendrons are derived from species coming from Asia, especially the Himalayan foothills, in western China, northern India, Myanmar, Sikkim and Nepal. Flower buds open a rosy-red and mature to rosy-pink. Thekopsora minima. Plant name. Rhododendron ponticum, called common rhododendron or pontic rhododendron, is a species of Rhododendron native to the Iberian Peninsula in southwest Europe and the Caucasus region in northern West Asia. Big leaf Maple. Dappled shade is preferred; full sun may result in leaf scorch. [5], Though it was in Great Britain before the last Ice Age, it did not recolonise afterwards and the modern ecology of the island developed without it. Conservation organisations in Britain now believe R. ponticum has become "a severe problem" in the native Atlantic oakwoods of the west highlands of Scotland and in Wales, and on heathlands in southern England, crowding out the native flora. R. ferrugineum. Scientific name: Graphocephala fennahi An introduced species, the Rhododendron leafhopper is a striking mix of green and red, with a black stripe across its face. It is commonly found growing in the … Plant Type: Tree/Shrub Broadleaf evergreen shrub, 6 ft (1.8 m), an "estate rhody", good growth habit. Pioneer Silvery Pink Rhododendron Rhododendron 'Pioneer Silvery Pink' Sku #30960. The scientific name of Rhododendron Arboreum is the botanical name or formal name. [citation needed], Fossil evidence shows it had a much wider range across most of southern and western Europe before the Late Glacial Maximum, or until about 20,000 years ago. Transferred from the Greek name for Nerium oleander. Rhododendron, Pentanthera (deciduous) and Tsutsuji (evergreen) are the two types of azalea plants. Synonyms Rhododendron 'Blue Tit'. some plants such as hydrangea, Euonymus, and rhododendron, share the same common and … The undersides of the leaves are covered in rust-brown spots, which give the species the second part of its binomial name (ferrugineum, Latin for 'rust-coloured, ferruginous'). Crookneck Squash. It is the endemic alpine plant native to high mountains situated around great Siberian lake Baikal. The plants were first grown in Britain in the 1760s, supplied by Conrad Loddiges, and became widely distributed through the commercial nursery trade in the late 18th and early 19th centuries. L. 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. baeticum is one of the most extensively cultivated rhododendrons in western Europe. Such areas include Nepal. Genus Rhododendron can be evergreen or deciduous shrubs or trees, with simple leaves, sometimes with a dense colourful indumentum of hairs on the lower side, and funnel-shaped, bell-shaped or tubular flowers that may be solitary or in short racemes Genus name comes from the Greek words rhodo meaning rose and dendron meaning tree. It was discovered by Robert … CLF-CLF-CLF000394 Herbier. Trees-Acacia. Synonyms Azalea canadensis Rhodora canadensis Rhododendron canadense, the rhodora or Canada rosebay, is a deciduous … CLF-CLF-CLF209096 Herbier. Rhododendron species might have acquired this cold adaptation from their ancestors that originated in cool climates. Genus name comes from the Greek words rhodo meaning rose and dendron meaning tree. Rhododendron ferrugineum is an evergreen shrubthat grows up to 3.3 feet (1 m) tall and produces clusters of pinkish-red, bell-shaped flowers throughout the summer. It is the endemic alpine plant native to high mountains situated around great Siberian lake Baikal. It is among the plants that always attract attention because of its showy and extremely beautiful flowers. chapmanii: CHAPMAN'S RHODODENDRON: Rhododendron viscosum: SWAMP AZALEA CLF-CLF-CLF183253 Herbier. Fifield Hall, Gainesville, FL 32611-0670 Phone: (352) 392-1831; Fax (352) 392-3870. Crookneck Squash. Home. (MNHN-P-P04500836) Rhododendron nivale Hook.f. Flowers have a light fragrance. Should be sited in areas protected from strong winter winds. Azaleas. Baeticum, native to Spain and Portugal. Geographic Origin Genus Rhododendron can be evergreen or deciduous shrubs or trees, with simple leaves, sometimes with a dense colourful indumentum of hairs on the lower side, and funnel-shaped, bell-shaped or tubular flowers that may be … [1], Rhododendron (Alpen Rose - Snow-rose - Rusty-leaved Alpenrose), https://en.wikipedia.org/w/index.php?title=Rhododendron_ferrugineum&oldid=977768944, Creative Commons Attribution-ShareAlike License, This page was last edited on 10 September 2020, at 21:30. Light: Most varieties prefer dappled shade. indicates you have reached the lowest level of the tree, click on the name at … You can tell a lot about a plant by studying its scientific name. Native to … (seuls figurent les spécimens informatisés et non l''intégralité des collections) Trier par "Infraspecific Taxon Details : Rhododendron ponticum subsp. Northstar Tart Cherry. A remnant of the original laurissilva forests that covered the peninsula 66 million yeras ago. Common Name: Rhododendron: Scientific Name: Rhododendron: Plant Family: Ericaceae: Origin: Southeast Asia: Height: Dwarf varieties can be as little as 40 cm while larger varieties can be 3 metres (ten feet) or more. Vegetables + … The Atlas of Florida Plants provides a source of information for the distribution of plants within the state and taxonomic information. leaf rust of blueberry. The plants in this genus have become a staple in nurseries and garden centers due to the demand for their showy and sometimes fragrant flowers. Likelihood to spread to UK (1 is very low - 5 is very high) 4. glandiferum (Porter) Rehder: RHPEE: Rhododendron periclymenoides (Michx.) Vegetables + Lamb's Lettuce. The scientific name of Azalea is the botanical name or formal name. These shrubs have large, leathery, shiny leaves and bright trumpet-shaped flowers in large trusses that bloom in late spring or summer. Rhododendron ponticum f. parviflorum Rukhadze & Pachulia. Scientific Name Genus: Rhododendron. Rhododendron macrophyllum, or coast rhododendron, is the state flower of Washington. We pride ourselves in one of the best ranges of rhododendron species in the country, and we try to propagate these from recognised good forms. Serrano Pepper. The Plant List includes 1,961 scientific plant names of species rank for the genus Rhododendron.Of these 613 are accepted species names. Vegetables + Lamb's Lettuce. Scientific Name; RHAS2: Rhododendron ashleyi Coker: Classification. An excellent choice for borders, mass planting, or containers. subsp. It is used as an ornamental plant in its own right, and more frequently as a rootstock onto which other more attractive rhododendrons are grafted. Click on a scientific name below to expand it in the PLANTS Classification Report. Perennial Flowers + Moneyplant. baeticum (Boiss. Crookneck Squash. PJM rhododendron are best grown in an acidic, moist, well-drained soil in part to full shade. Fungus. Its presence today in Great Britain is due to humans introducing it, and it easily naturalises and becomes a pest in some situations, often covering whole hillsides (especially in Snowdonia and the western British Isles). Family: Ericaceae. R. ponticum is a dense, suckering shrub or small tree growing to 5 m (16 ft) tall, rarely 8 m (26 ft). Click to expand the tree and to collapse the tree. Semi-evergreen. There are two types of rhododendrons: Evergreens, which stay green all year, are called Rhododendron Tsutsusi; The deciduous class, that lose their leaves in the fall and lay dormant in the winter, are called Rhododendron Pentanthera. Rhododendron is the common and genus name for a large and diverse group of woody shrubs and small (rarely large) trees in the flowering plant family Ericaceae. lyi (H. Genus Rhododendron can be evergreen or deciduous shrubs or trees, with simple leaves, sometimes with a dense colourful indumentum of hairs on the lower side, and funnel-shaped, bell-shaped or tubular flowers that may be solitary or in short racemes. CLF-CLF-CLF000396 Herbier. This page was last edited on 21 November 2020, at 15:59. Perennial Flowers + Moneyplant. Texas Redbud. Scientific Name of Dwarf Rhododendron and Tilaka is used by scientists worldwide. Should be sited in areas protected from strong winter winds. Pratia. Injection of herbicide into individual plants has been found to be more precise and effective.[11]. Home. Big leaf Maple. The Rhododendron genus (which gives us azaleas) falls into the former camp. Perennial Flowers + Moneyplant. Other rhododendron species are state flowers in India and Pakistan, and the national flower of Nepal. Azaleas. Serrano Pepper. Absent. Evergreen. Rhododendron arboreum, the tree rhododendron, also known as Burans or Laligurans or … Rhododendron L. – rhododendron Species: Rhododendron maximum L. – great laurel the Latin name for a rhododendron is surprisingly, Rhododendron! var. Name Authority; Azalea: Linnaeus: Taxonomy. Rhododendron species are found growing in the wild in many parts of the world. Azaleas are also rhododendrons. - Buy this stock photo and explore similar images at Adobe Stock Its name means "tending to … heterophyllum R. Ansin", http://www.countrysideinfo.co.uk/rhododen.htm#Introduction%20to%20Britain, "Rhododendron: A killer of the Countryside", "BREAKTHROUGH IN BATTLE AGAINST PROBLEM PONTICUM", "Nectar chemistry modulates the impact of an invasive plant on native pollinators", https://en.wikipedia.org/w/index.php?title=Rhododendron_ponticum&oldid=989884098, Articles with unsourced statements from November 2020, Creative Commons Attribution-ShareAlike License. Texas Redbud. Home. Because azaleas are closely related to rhododendrons, it is sometimes difficult for a layperson to distinguish between the two. The species has two disjunct populations one in the southwestern Iberian Peninsula (central and southern Portugal and southwestern Spain) and the other near the southern Black Sea Basin (eastern Bulgaria, northern Turkey, Georgia, and Northern Caucasus). Rhododendron ferrugineum. Rhododendron was named and classified by Linnaeus who named it from the Greek for rose tree. Transferred from the Greek name for Nerium oleander. Home. The showy blooms have undulating edges and blanket this dense, rounded shrub from early to mid-spring. [citation needed], It was noted by the botanist Joseph Pitton de Tournefort during his travels in the Near East in 1700–02, and so received its name from Linnaeus to identify the ancient kingdom on the south shores of the Black Sea, Pontus, in which it grew. These may be identified by the original plant collector’s seed number, (eg R. denudatum EGM 294) or by a clonal name given to a selected plant (eg R. degronianum ‘Ho Emma’). Rhododendron ponticum, called common rhododendron or pontic rhododendron, is a species of Rhododendron native to southern Europe and southwest Asia . A charming early bloomer with beautiful flowers in shades of pink. Cette page présente les éléments 0 à 500. R. C. Fang" .Commonly found in the forest northern of Thailand. Fruits + Chicago Hardy Fig. One type is azalea. It also paralyzed bees of the species Andrena carantonica, a solitary mining bee. Bush of blooming rhododendron closeup this scientific name "Rhododendron ciliicalyx Franch. Trees-Acacia. CLF-CLF-CLF183254 Herbier. Holden Rhododendron Rhododendron 'Holden' (H-2) Sku #43620. Rhododendron Adamsii or Sagan Dale, a member of the Heath family, is a small evergreen shrub with beautiful blooms that is native to the high alpine mountains surrounding Lake Baikal in Siberia. Fruits + … ‘English Roseum’ is a dense, mound-forming, evergreen rhododendron that typically grows to a mature height of 4-10’ tall and 5-11’ wide. This genus also contains shrubs commonly called azaleas within its 800 Rhododendron species and thousands of hybrids. Trees-Acacia. ‘English Roseum’ is a dense, mound-forming, evergreen rhododendron that typically grows to a mature height of 4-10’ tall and 5-11’ wide. Yellow Wild Indigo. Serrano Pepper. The species are native to temperate areas of the Northern Hemisphere but are most abundant in the Himalayas and other mountains of Asia. CLF-CLF-CLF000393 Herbier. Genus name comes from the Greek words rhodo meaning rose and dendron meaning tree. Other common names tree-like rhododendron . Big leaf Maple. Scientific Name; RHCA19: Rhododendron californicum Hook. 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. 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. The scientific name of Dwarf Rhododendron is the botanical name or formal name. Perennial Flowers + Moneyplant. More than a thousand described species fall into this genus; many are native to Asia, but several grow native in the United States. Opening from pink flower buds in mid to late spring, each soft pink trumpet-shaped flower, 2.5 in. The flowers are 3.5 to 5 cm (1.4 to 2.0 in) in diameter, violet-purple, often with small greenish-yellow spots or streaks. Impact (1 is very low - 5 is very high) 3. Genus: Rhododendron. Dappled shade is preferred; full sun may result in leaf scorch. Origin and evolution of invasive naturalized material of Rhododendron ponticum L. in the British Isles. & Reuter) Hand.-Mazz", "Infraspecific Taxon Details : Rhododendron ponticum subsp. [3], The range in the Iberian Peninsula is limited to mountain ranges, the Caramulo mountains, the Monchique range and the Aljibe range. Scientific Name. 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. The Plant List includes a further 418 scientific plant names of infraspecific rank for the genus Rhododendron.We do not intend The Plant List to be complete for names of infraspecific rank. Le'v.) The rhododendron is a shrub that comes in many diverse species, but most people use the word to refer to Rhododendron catawbiense and its hybrids. Although rhododendron is examined in 6 groups, rhododendron and hymenanthens are the most preferred species for those dealing with ornamental plants. ... PJM rhododendron are best grown in an acidic, moist, well-drained soil in part to full shade. CLF-CLF-CLF000397 Herbier. Binomial name. The genus Rhododendron is grouped into the heath family, Ericaceae which contains many acid soil loving species. Pratia. Family Ericaceae . Rhododendron was named and classified by Linnaeus who named it from the Greek for rose tree. Other common names rhododendron 'Persil' . Azalea or Tsutsuji, Rhododendron (scientific name: Rhododendron ferrugineum L.) is a cold-resistant shrubs and middle tall tree of the Ericaceae family is native to Japan and. Yellow Wild Indigo. Rhododendron Adamsii or Sagan Dale, a member of the Heath family, is a small evergreen shrub with beautiful blooms that is native to the high alpine mountains surrounding Lake Baikal in Siberia. Pronunciation: rho-do-DEN-dron. Genus name comes from the Greek words rhodo meaning rose and dendron meaning tree. The leaves are evergreen, 6 to 18 cm (2.4 to 7.1 in) long and 2 to 5 cm (0.79 to 1.97 in) wide. At the other end of its range, in southern Spain, Linnaeus' friend and correspondent Clas Alströmer found it growing with oleander. Crookneck Squash. Rhododendron, the scientific name of rhododendrons, means rosewood. Vegetables + Lamb's Lettuce. Rhododendron macrophyllum literally means, “Rose tree with big leaves.” It is the state flower of Washington State. Scientific Name of Dwarf Rhododendron and Tilaka is used by scientists worldwide. [10] Clearance strategies have been developed, including the flailing and cutting down of plants with follow-up herbicide spraying. Rhododendron arboreum is the national flower of Nepal, in India it is the state tree of Uttarakhand and the state flower of Himachal Pradesh and Nagaland. Other rhododendrons are native to Japan, Korea, Europe and some are native to eastern and western North America. Pratia. Yellow Wild Indigo. - Buy this stock photo and explore similar images at Adobe Stock Click on a scientific name below to expand it in the PLANTS Classification Report. Common Name: Great Rhododendron, Rosebay Rhododendron. R. ferrugineum is moderately toxic, containing arbutin, arecoline and rhodoxanthin, and can cause vomiting, and difficulties of the digestive, nervous, respiratory and circulatory systems. "Pontic Rhododendron" flowers (or Common Rhododendron) in St. Gallen, Switzerland. Scientific Name Common Name Herbarium Specimens Photos; Rhododendron alabamense: ALABAMA AZALEA: Rhododendron austrinum: FLORIDA FLAME AZALEA; ORANGE AZALEA: Rhododendron canescens: SWEET PINXTER AZALEA; MOUNTAIN AZALEA: Rhododendron minus var. Genus Rhododendron Taxonomic Tree Click to expand the tree and to collapse the tree. 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. The attempts to cultivate this species in botany gardens had no success. Honey produced with pollen from the flowers of this plant can be quite poisonous, causing severe hypotension and bradycardia in humans if consumed in sufficient quantities, due to toxic diterpenes (grayanotoxins). The undersides of the leaves are covered in rust-brown spots, which give the species its scientific name. The parentage of this rhodie is unknown … A vigorous, compact, and heat tolerant shrub with dense, lustrous foliage. Rhododendron ×vanhoeffeni [tomentosum ssp. Genus Rhododendron Taxonomic Tree.