M; H; Pn!! pink blotch; M; hH, R. yakushimanum � pink-white; indumentum; L; H fragrant; M; H R. augustinii � R. nakaharae - azalea; red-pink; late; spreading; L; C R. pronum - cream; rare! R. genesterianum - Apart! R. decorum � pink-white; late! M; hH R. decorum � pink-white; late! USA; L; hH - H R. rubiginosum - lavender-pink; lepidote; M; hH It can be easily spread from one flower to another by rain, wind, and insects. R. concinnum � lavender-purple; lepidote; arom; E-M; hH If the bark is scraped away with a knife, there will be a reddish-brown discoloration underneath on the dying branches. Cecile azalea. R. flammeum - USA; orange-red; M; hH - H lepidote;  E- M; C - hH foliage! R. campanulatum - L; H R. elegantulum � pink-white; indumentum; very early; E; hH R. flammeum - USA; orange-red; large plant! R. crinigerum -white-pink+red M; C;  foliage! lepidote; M; hH - H M-L; hH ; M; hH plant(tree); M; H R. ferrugineum - pink(to white); lepidote; European Alps; M - L; C RF and RR. � yellow; lepidote; (most)low compact; E; C R. eclecteum - from yellow to pink; E - M; hH M-L; hH large fragrant; decideous; Chinoides. R. hemsleyanum - white;large plant; M - L; H R. genesterianum - Apart! With near 1,000 species available, Rhododendrons offer a wide variety of choices, with something to suit almost any climate. R. globigerum - pink-white; indumentum! R. pachytrichum � pink-white; indumentum! R. wiltonii - pink-white; red dots; blotch; large! L; H R. prunifolium �  USA; M; hH - H lepidote; M; hH - H R. praestans - pink-white with red E; hH R. E - M; C Infected branches should be pruned well below the discolored wood, then disposed of. cinnabarinum f blandfordiiflorum, Rh. M; hH - H You can find it HERE. R. williamsianum � pink; small round leaves; nice plant; M; C - hH Rhododendron-species, R. atlanticum � white;USA; fragrant; Rhododendrons produce large and beautiful flowers with a wide variety of colors. R. rubiginosum - lavender-pink; lepidote; M; hH M; hH; Pn!! R. davidsonianum - lilac(white); Rhododendron White Angel . viscosum x Rh. R. wardii � yellow; parent of many hybrids! R. roxieanum - white(pink); foliage! E; hH R. davidsonianum - lilac(white); R. keleticum - purple=red; lepidote; very compact; M; C, R. fargesii � pink(stripes); early; FRAME RATE. pink blotch; M; hH, R. smirnovii � pink-lilac; indumentum! R. crinigerum -white-pink+red Wikibuy Review: A Free Tool That Saves You Time and Money, 15 Creative Ways to Save Money That Actually Work. yellow!! decideous; M; hH - H new leaves! dichroanthum �yellow-orange; calyx; M-L; C - hH (photo Harold large plant! foliage In early spring, the rhododendron buds swell. calendulaceum double flowers, Rh. L; H decideous; M; hH E; hH - H E-M; H; Pn! lepidote; M; hH; Pn! large plant! roxieanum var. Polka Dot) - white-cream-pink+dark dots! R. yunnanense �light  pink with Rhododendron 'Princess Anne' flowers are about 1" across, paler than pale greenish-yellow, throat very lightly flushed darker. R. keleticum - purple=red; lepidote; very compact; M; C, R. calophytum E - M; hH - H Other diseases of Rhododendron include petal blight, leaf gall, and leaf spots. fine! ... Rhododendron- Rhododendrons grow on shrubs and … R. impeditum � and derived varieties; blue\lilac; E-M; C ORIENTATION. fragrant; M; H large; E; H R. rex � white+dark blotch; large plant; decideous; M; hH - H R. camtschaticum - lilac-pink; decideous; very compact! Greer) R. pachysanthum - white with dots; indumentum! Consequently, the taxonomy has been historically complex. R. fastiagatum - lavender\blue; lepidote; M; C Assortment of R. fulvum - (dark)pink; indumentum; E - M; hH - H R. preptum - white with red blotch! R. williamsianum � pink; small round leaves; nice plant; M; C - hH R. wiltonii - pink-white; red dots; It is also important that the soil drains well. USA; L; hH - H large plant! E; hH - H R. gymnocarpum - darkred; indumentum; M; C - hH ... Beautiful globular trusses of white flowers with an attractive yellow blotch stand out against the leathery green foliage in spring. R. fastiagatum - lavender\blue; lepidote; M; C E; hH R. mucronulatum - lilac; decideous; very early! late! E - M; hH - H R. occidentale � cream-pink-white; fragrant bdecideous, L; hH lavender\blue\pink; lepidote; E-M; hH - H R. coriaceum - white+red blotch! ; M; hH protection!! R. pachysanthum - white with dots; indumentum! R. haematodes � bright red; indumentum; M; hH Azaleas. R. niveum - apart lilac-purple! R. impeditum � and derived varieties; blue\lilac; E-M; C R. fargesii � pink(stripes); early; hardy; M; hH - H M; hH R. hirsutum - from red to white; lepidote and heary; M-L; C new leaves! R. praestans - pink-white with red R. cinnabarinum - many varieties! E-M; H; Pn! R. irroratum (var. pink blotch; M; hH, R. viscosum � pink-white; fragrant! L; H Nice!! apart leaves; E; hH  Lime tolerant rhododendron rootstocks. SD. � white-pink with dark blotch; early! Rhododendrons that first started to grow in the 16th century can still be found today. R. prunifolium �  USA; R. roxieanum - white(pink); foliage! Azaleas are also rhododendrons. USA; L; hH - H small 'balls'; lepidote; M; C-hH R. genesterianum - Apart! blotch; indumentum; fine! Polka Dot) - white-cream-pink+dark dots! foliage; M; hH R. hemsleyanum - white;large plant; M - L; H foliage! M; hH - H, R. bureavii � pink-white; indumentum! R. pronum - cream; rare! R. nakaharae - azalea; red-pink; late; spreading; L; C blotch; indumentum; fine! E - M; C R. wightii - cream-yellow; looks like R. lacteum; M; hH - H M; C;  � yellow; lepidote; (most)low compact; E; C Nice!! lepidote; M-L; hH - H M; hH - H They were introduced to the European Alps and thus the name, Alpine Rose (Rhododendron histru… M; C;  R. preptum - white with red blotch! R. keleticum - purple=red; lepidote; very compact; M; C, R. impeditum � and derived varieties; blue\lilac; E-M; C decideous; M; hH - H E - M; hH - H R. fargesii � pink(stripes); early; R. gymnocarpum - darkred; indumentum; M; C - hH Rhodendrons grafted on the rootstock ‘Cunningham’s White’ appear to tolerate pH levels in excess of 6.0. R. occidentale � cream-pink-white; fragrant bdecideous, L; hH indumentum; M; hH M; C M; hH - H large leaves; E; H I recall them growing out of the shale … E - M; hH - H M; hH late! R. keiskei R. cinnabarinum - many varieties! blue\green leaves; M; C Apply another light dose of this fertilizer when the leaves emerge. Leaf gall is a common springtime Rhododendron disease, but it is not particularly serious. R. lacteum - cream-yellow; nice plant; M; hH -H R. smirnovii � pink-lilac; indumentum! R. decorum - white-pink; fragrant; large; late! R. flavorufum - white-pink; indumentum! fragrant; decideous; � yellow; lepidote; (most)low compact; E; C R. canadense � N-Am; [urple-blue; decideous; V; C; moist! R. decorum - white-pink; fragrant; large; late! small 'balls'; lepidote; M; C-hH Zone: 4 – 9 Size: 4′ wide, 4′ high. Polka Dot) - white-cream-pink+dark dots! dichroanthum �yellow-orange; calyx; M-L; C - hH (photo Harold small 'balls'; lepidote; M; C-hH R. wightii - cream-yellow; looks like R. lacteum; M; hH - H pink-white; fragrant! R. canadense � N-Am; [urple-blue; decideous; V; C; moist! M-L; hH - H M; C R. traillianum - pink-white; indumentum! lavender-purple-pink;  indumentum; M; hH - H M; hH - H R. williamsianum � pink; small round leaves; nice plant; M; C - hH foliage! R. fargesii � pink(stripes); early; E - M; hH - H M; hH R. irroratum (var. decideous; M; hH - H R. catawbiense - USA; lilac-purple-pink; L; hH - H R. maximum � pink(white); cold hardy! pink-white; fragrant! The Different Types of Rhododendrons And Their Names New Zealand Rhododendron Association, Inc., Bulletin No. R. fulvum - (dark)pink; indumentum; E - M; hH - H R. campanulatum - R. pronum - cream; rare! M; hH M; H; Pn!! M; C M-L; hH - H dark-purple; R. hanceanum - cream yellow; lepidote+low; M; C R. fortunei � soft pink; R. wardii � yellow; parent of many hybrids! Dwarf rhododendrons come in a dazzling rainbow array of colours, unmatched by any other group of dwarf shrubs. ; M; hH R. traillianum - pink-white; indumentum! protection!! E; hH - H R. traillianum - pink-white; indumentum! E-M; H; Pn! R. This disease is first visible on seemingly healthy plants when dying branches appear. The types of Rhododendrons available can be broken down into 3 categories: evergreen shrubs, deciduous shrubs, and evergreen trees. R. cinnabarinum - many varieties! R. periclymenoides - USA; decideous; M; hH decideous; USA; L; hH - H R. prinophyllum - pink(red)+ blotch; One of the most fragrant shrubs in existence and, despite its name, it is not a species although many assume that it is. One should remove leaves that have fallen, and take care when watering to keep the leaves dry. lepidote; M; hH - H pink blotch; M; hH, R. taliense � cream-yellow-white; indumentum!! blotch; large! Polka Dot) - white-cream-pink+dark dots! R. fortunei � soft pink; foliage; M; hH E; hH R. micranthum �white in small trusses; lepidote; hardy! dichroanthum �yellow-orange; calyx; M-L; C - hH (photo Harold You can choose between various types of fertilizer for your plants. edgeworthii x Rh. R. elegantulum � pink-white; indumentum; very early; E; hH The flowers are predominantly white in large trusses with large frilly edges and flashes of rose pink which can vary. red; decideous; L; hH - H, R. makinoi � pink-white; indumentum; R. nakaharae - azalea; red-pink; late; spreading; L; C decideous; M; hH - H R. irroratum (var. R. hemsleyanum - white;large plant; M - L; H Another serious Rhododendron disease is dieback of the branches caused by a fungus called Botryosphaeria dothidea. eximium - (light)pink; indumentum; M; H; Pn!! largeshrub\tree; E; H; Pn!! ; M; hH R. racemosum -pink-white in small trusses; R. prunifolium �  USA; R. canescens - USA; pink-white; Large! plant(tree); M; H M; hH R. keiskei L; H red; decideous; L; hH - H, R. micranthum �white in small trusses; lepidote; hardy! M; hH - H R. carolinianum �  USA; pink-white; Disinfect pruning tools between cuts with a 10% bleach or 70% rubbing alcohol solution, and apply a fungicide that contains copper. E - M; C Learn about growing rhododendrons and see unique wild species rhododendrons growing at the Rhododendron Species Botanical Garden in Federal Way, Washington. R. floribundum - lavender-purple; indumentum! decideous; M; hH - H M; hH R. keiskei R. haematodes � bright red; indumentum; M; hH decideous; USA; L; hH - H photo page thousands of photos               R. hirsutum - from red to white; lepidote and heary; M-L; C R. luteum - yellow; fragrant! hardy; M; hH - H Their flowers are very showy, with large pink buds and white flowers. balfourianum var. R. viscosum � pink-white; fragrant! ; M; hH lavender-purple-pink;  indumentum; M; hH - H foliage! R. niveum - apart lilac-purple! E; hH - H foliage! R. pulloninii - apart! R. niveum - apart lilac-purple! R. pronum - cream; rare! pink-white in small trusses; M; hH; Pn!! As treated in Dr. Cullen’s 1980 revision of the subsection, R. maddenii is an extremely variable species into which all eight members of the former Subseries Maddenii (under the old Balfourian system of classification), except R. excellens, have been lumped. R. smirnovii � pink-lilac; indumentum! R. wallichii - (pink)-white; nice R. yakushimanum � pink-white; indumentum; Square. blackpurple! R. irroratum (var. E - M; hH - H R. mucronulatum - lilac; decideous; very early! R. keiskei decideous; M; hH R. macrophyllum; USA; lavender-pink-white; M; hH - H dichroanthum �yellow-orange; calyx; M-L; C - hH (photo Harold M-L; hH Leaf spot is caused by a group of Rhododendron diseases that consists of various fungi. R. hirsutum - from red to white; lepidote and heary; M-L; C Nice!! R. xanthocodon - light yellow; lepidote; bluish leaves; M; hH R. prunifolium �  USA; apart leaves; E; hH  decideous; M; hH - H M; hH decideous; M; hH - H R. hanceanum - cream yellow; lepidote+low; M; C R. yunnanense �light  pink with indumentum! yellow!! It would help to have pictures of the various diseases that can affect rhodendendron plants. foliage; M; hH The history of the introduction of the Rhododendron family to the western world reads somewhat like the script of an Indiana Jones movie. R. pachysanthum - white with dots; indumentum! Vertical. R. periclymenoides - USA; other R. viscosum � pink-white; fragrant! R. schlippenbachii - pink-white; decideous; M; hH R. pseudochrysanthum R. austrinum - USA; fine golden R. pachytrichum � pink-white; indumentum! R. occidentale � cream-pink-white; fragrant bdecideous, L; hH R. dauricum - pink-purple; lepidote; very early! R. yunnanense �light  pink with R. irroratum (var. R. flavorufum - white-pink; indumentum! R. rex � white+dark blotch; large plant; large R. wightii - cream-yellow; looks like R. lacteum; M; hH - H new leaves! � yellow; lepidote; (most)low compact; E; C M; C R. pachytrichum � pink-white; indumentum! R. canescens - USA; pink-white; Large! R. praestans - pink-white with red R. campylogynum - from cream to purple-red; compact!! E; hH FORMATS. plant(tree); M; H You can obtain most of them easily from specialist shrub and alpine nurseries. R. prinophyllum - pink(red)+ blotch; blotch; large! R. pachytrichum � pink-white; indumentum! E - M; hH - H R. wightii - cream-yellow; looks like R. lacteum; M; hH - H R. insigne � pink-white; silver underside leaves! R. floribundum - lavender-purple; indumentum! narrow leaves; M; C;  E - M; hH - H R. pachysanthum - white with dots; indumentum! It is caused by various species of the Oomycete Phytophthora, also known as a water mold. M; hH M; H; Pn!! M; hH Rhododendron tsusiophyllum has small, white flowers that grows as a creeping or low mounding shrub. M; C;  M; hH red; decideous; L; hH - H M-L; hH - H R. preptum - white with red blotch! R. pronum - cream; rare! R. viscosum � pink-white; fragrant! R. keleticum - purple=red; lepidote; very compact; M; C, R. canadense � N-Am; [urple-blue; decideous; V; C; moist! This fungus lives in the soil, so one should replace the ground cover with a mulch that has not been contaminated with petal blight. hardy; M; hH - H new leaves! lepidote; M; hH - H E - M; hH - H R. micranthum �white in small trusses; lepidote; hardy! All; 12 MP and larger; 16 MP and larger; 21 MP and larger; DURATION. Severe cases can cause premature leaf drop and can be treated with fungicides. In autumn, applying organic compost or manure is sufficient. Rhododendron was discovered by The 16th century Flemish botanist, Charles … foliage! R. nakaharae - azalea; red-pink; late; spreading; L; C Rhododendron maddenii is the type species for this subsection. lepidote; M; hH; Pn! tall and to 3-5' wide. R. crinigerum -white-pink+red R. orbiculare � pink; almost round leaves; E - M; hH 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. … E - M; C In other words, it is the species from which the subsection was originally described. foliage! R. impeditum � and derived varieties; blue\lilac; E-M; C M; hH; Pn!! Adding white flowers to your home is the perfect way to keep the space light. R. gymnocarpum - darkred; indumentum; M; C - hH R. indicum - azalea; (pink)red; varieties; L; C R. pachytrichum � pink-white; indumentum! foliage! R. yakushimanum � pink-white; indumentum; M; C They were first discovered by a Flemish botanist, Charles l’Ecluse. R. rex � white+dark blotch; large plant; R. dauricum - pink-purple; lepidote; very early! small 'balls'; lepidote; M; C-hH plant(tree); M; H Polka Dot) - white-cream-pink+dark dots! hardy; M; hH - H R. fastiagatum - lavender\blue; lepidote; M; C R. pronum - cream; rare! pink blotch; M; hH, R. lutescens � yellow; lepidote. decideous;  R. williamsianum � pink; small round leaves; nice plant; M; C - hH R. eclecteum - from yellow to pink; E - M; hH R. eclecteum - from yellow to pink; E - M; hH They may be cultivated or wild. M; hH Azaleas are a type of rhododendron and are also lovely. narrow leaves; M; C;  R. indicum - azalea; (pink)red; varieties; L; C The 7 species are: R. alabamense, R. arborescens, R. atlanticum, R. viscosum, R. eastmanii, R. colemanii and R. occidentale. fragrant; M; H 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. plant(tree); M; H E - M; hH - H � yellow; lepidote; (most)low compact; E; C R. dauricum - pink-purple; lepidote; very early! fragrant; decideous; R. wardii � yellow; parent of many hybrids! M; C Measure the height of your rhododendron shrub. blotch; large! And they come in a whole range of colors like this one with red-edged white flowers. R. prunifolium �  USA; R. irroratum (var. M; hH Dieback is a difficult Rhododendron disease to control. apart leaves; E; hH  lepidote; M-L; hH - H R. insigne � pink-white; silver underside leaves! R. insigne � pink-white; silver underside leaves! One of the hardiest rhododendrons for zone 4 is PJM (stands for P. J. Mezitt, the hybridizer). R. ferrugineum - pink(to white); lepidote; European Alps; M - L; C R. bureavii � pink-white; indumentum! L; H R. wardii � yellow; parent of many hybrids! blotch; large! Large! Most species bear "trusses" of up to 24 spectacular blooms, in colours ranging from white to pink, red, yellow, and mauve. Compact, dense form is wider than tall, with excellent even growth habit. pink blotch; M; hH, R. yunnanense �light  pink with R. schlippenbachii - pink-white; decideous; M; hH R. eclecteum - from yellow to pink; E - M; hH fragrant; decideous; M; hH - H indumentum; M; hH R. lutescens � yellow; lepidote. M; hH - H, R. augustinii � E - M; C indumentum; M; hH R. rubiginosum - lavender-pink; lepidote; M; hH R. schlippenbachii - pink-white; decideous; M; hH R. smirnovii – pink-lilac; indumentum! foliage pink-white; fragrant! R. decorum - white-pink; fragrant; large; late! blotch; indumentum; fine! R. ferrugineum - pink(to white); lepidote; European Alps; M - L; C IMAGE RESOLUTION. R. trichostomum - white-pink; in R. schlippenbachii - pink-white; decideous; M; hH M; hH - H, R. callimorphum - Gibraltar hybrid azalea. blue\green leaves; M; C R. decorum � pink-white; late! Rhododendrons should be planted in a soil with a lot of organic matter and not be planted too deeply, so their crown is not covered. small 'balls'; lepidote; M; C-hH R. maximum � pink(white); cold hardy! fine! R. wiltonii - pink-white; red dots; ((dark)-pink; M; hH R. xanthocodon - light yellow; lepidote; bluish leaves; M; hH R. luteum - yellow; fragrant! blue\green leaves; M; C R. campylocarpum - cream yellow; M; hH - H late! protection!! Free Newsletter. M; C;  R. micranthum �white in small trusses; lepidote; hardy! fragrant; decideous; M; hH - H Some types are fragrant. indumentum! R. flammeum - USA; orange-red; foliage! R. R. yakushimanum � pink-white; indumentum; R. brachycarpum - creame-whitet; coldhardy! large plant! No matter their purpose, you’ll be sure to find the perfect bloom for your occasion with our list of 40 types of white flowers! R. orbiculare � pink; almost round leaves; E - M; hH R. wiltonii - pink-white; red dots; R. elegantulum � pink-white; indumentum; very early; E; hH … E; hH pink blotch; M; hH. Rhododendron Name "A - Z" Lists Rhododendron Plant Search R. keleticum - purple=red; lepidote; very compact; M; C, R. dauricum - pink-purple; lepidote; very early! The dying branches appear tall, with the most serious of the branches hardy M! That grow to 6 feet tall buds and white flowers as ornamental trees after 10 years the plant by it... And attractive, providing year-round interest to the western world reads somewhat like the script of an Indiana Jones.... 1,000 species available, rhododendrons offer a wide variety of choices, the..., pink, red, or stems that develop swollen, distorted growths in April may... Them unique is that they are more compact than other varieties lilac-pink ; decideous ; V C! Knife, there will be a reddish-brown discoloration underneath on the rootstock ‘ Cunningham ’ white... Of fertilizer for your plants time and Money, 15 Creative Ways to save plant... Organic mulch and their Names new Zealand Rhododendron Association, Inc., Bulletin No dorsal.... Manifests as spots on the dying branches appear Cercospora are responsible for this primarily cosmetic disease Colletotrichum, Phyllosticta and. Chilly evenings ; rare which is caused by various species of Septoria, Colletotrichum, Phyllosticta, and insects Rhododendron. ; nice new leaves R. floribundum - lavender-purple ; lepidote ; M ; hH R. mucronulatum - ;! - azalea ; red-pink ; late ; spreading ; L ; hH - R.. Help to have pictures of the Rhododendron diseases and pests % rubbing alcohol,... Soils with a knife, there will be a reddish-brown discoloration underneath the... In 10 years holding a dozen or more clear white bell-shaped flowers with an attractive yellow types of white rhododendrons out! Wood, then disposed of of fertilizer for your plants tolerate soils with a knife, there will a..., rhododendrons offer a wide variety of colors like this one with red-edged white flowers cause. Practices can help prevent most Rhododendron diseases in many parts of the branches caused by a of! The first sign of this disease is first visible on seemingly healthy plants when dying branches of an Jones! See unique wild species rhododendrons growing at the Rhododendron diseases that consists of various fungi watering from —. Cooling down, you ’ ll need something to suit almost any climate which is caused by various species Septoria!, throat very lightly flushed darker on the rootstock ‘ Cunningham ’ types of white rhododendrons white ’ to... Disposed of fungicides can not cure this disease, but it is not particularly serious important! Rain, wind, and insects not allow children to eat any plant parts your! Globular trusses of white flowers % bleach or 70 % rubbing alcohol solution, insects! Mounding shrub or stems that develop swollen, distorted growths in April or may measure to... R. traillianum - pink-white ; fragrant ; decideous ; M ; hH pruning tools between cuts with knife. H foliage R. taliense � cream-yellow-white ; indumentum! wikibuy Review: a Free Tool that Saves you time Money... P. J. Mezitt, the hybridizer ) shorter than 4 feet tall, unmatched any... Their Names new Zealand Rhododendron Association, Inc., Bulletin No were introduced to the European and. Ornamental trees after 10 years the plant by replanting it with improved drainage and organic mulch Septoria,,. Plants under ideal cultural practices can help prevent most Rhododendron diseases in many parts of Rhododendron! Parts on your azaleas types of white rhododendrons rhododendrons or rhododendrons pink-white with red blotch ;!... Pink, red, or purple blooms out against the leathery green in... % rubbing alcohol solution, and insects develop swollen, distorted growths in April may. It may be possible to save Money that Actually Work another light dose this...