| Verwandte Arten der Gattung Rhododendron (Wildarten und beliebte Hybriden: Rhododendren, Alpenrosen, Azaleen) |
| Nr. | Pflanzenarten | Blütezeit [?] | Breite/Höhe | Verbreitung |
| 1 | Rhododendren und Azaleen (Rhododendron InfosRhododendrenAzaleen) | III-V-VI | Europe, Asia, N-America |
| 2 | Rhododendren (Rhododendron augustinii) | V | b/h=2-5(10)m | Asia: China, Yunnan, Sichuan, Hupeh |
| 3 | Rhododendron auriculatum | VI | b/h=2-5/5-10m | Asia: W-China |
| 4 | Bärtiger Rhododendron (Rhododendron barbatum) | IV | b/h=1,5-6/1,5-6(8)| Asia: W-China |
| 5 | Flammenazalee, Pontische Azalee, Gelbe Alpenrose (Rhododendron calendulaceum) | V | b/h=2-3m | N-America |
| 6 | Rhododendron calophytum | A IV | b/h=6/2-12m | Asia: SW-China, Tibet |
| 7 | Glockenblütiger Rhododendron (Rhododendron campanulatum) | V | b/h=2-4m | Asia: Himalayas |
| 8 | Kamtschatkaazalee (Rhododendron camtschaticum) | V-VI, vereinzelt bis Herbst | b/h=1/0,3m | O-Asia: Alaska |
| 9 | Rhododendron caucasicum | M/E IV-V | b/h=1m | Asia: Caucasus |
| 10 | Zinnoberroter Rhododendron (Rhododendron cinnabarinum) | V | b/h=2/>3m | Asia: Himalayas |
| 11 | Reizender Rhododendron (Rhododendron concinnum) | V | b/h=3m | Asia: Sichuan |
| 12 | Rhododendron dauricum | II-III | b/h=1,5m | Asia: E-Siberia, NE-Asia |
| 13 | Rhododendron degronianum | V | b/h=1m | Asia: Japan: Yaku Shima Island |
| 14 | Rostblättrige Alpenrose (Rhododendron ferrugineum) | VI-VIII | b/h=1m | C-Europe: Pyrenees, Alps, Apennines, Balkan Peninsula |
| 15 | Rhododendron forrestii | IV | b/h=0,6/0,1(-0,2)m | Asia: Yunnan, SE-Tibet |
| 16 | Fortunes Rhododendron (Rhododendron fortunei) | E V-VI | b/h=3/10m | Asia: China |
| 17 | Almenrausch, Behaarte Alpenrose (Rhododendron hirsutum) | VI | b/h=1m | C-Europe: Kalkalpen, Alps, W-Balkan Peninsula |
| 19 | Veilchenblauer Rhododendron, Unzugängliche Alpenrose (Rhododendron impeditum) | IV | b/h=0,5m | Asia: W-China, Yunnan, Sichuan |
| 20 | Rhododendron Wildarten (Rhododendron insigne) | V | b/h=2-4m | Asia: W-China, SW-Sichuan |
| 21 | Pontische Azalee, Gelbe Alpenrose (Rhododendron luteum) | V | b/h=1-3m | E-Europe, Asia: Kaukasus |
| 22 | Rhododendron makinoi | V | b/h=1,5m | Asia: S-Japan |
| 23 | Riesenrhododendron (Rhododendron maximum) | E V-VI | b/h=5m | N-America: E-Canada, E-USA |
| 24 | Kleinblütiger Rhododendron (Rhododendron micranthum) | VI | b/h=1,5m | Asia: N-China, N-Korea |
| 25 | Japan-Azalee (Rhododendron molle) | V | b/h=1,5m | Asia: C-/E-Japan |
| 26 | Porstblättrige Azaleen (Rhododendron mucronatum) | V | b/h=1-1,5m | Origin uncertain. |
| 27 | Kleinspitzige Azalee (Rhododendron mucronulatum) | II-III | b/h=1,5-2m | Asia: E-Siberia, China, Mongolia |
| 28 | Westliche Azalee (Rhododendron occidentale) | E V-VI | b/h=3m | WN-America: US: Oregon, California |
| 29 | Bergruhmrhododendron (Rhododendron oreodoxa) | A IV | (1-)3(8-12)m | Asia: W-China |
| 30 | Rhododendron polylepis | V | b/h=2m | Asia: China, Yunnan, Sichuan, Hupeh |
| 31 | Pontischer Rhododendron (Rhododendron ponticum) | V | b/h=1,5->2m | S-Europe, Asia: Spain, Portugal, Turkey, Caucasus, Libanon e.o. |
| 32 | Rhododendron praevernum | A IV | b/h=2-7m | Asia: SE-Sichuan, W-Hubei |
| 34 | Smirnows Rhododendren (Rhododendron smirnowii) | V | b/h=2-4m | Asia: NO-Turkey, Caucasus |
| 35 | Rhododendron souliei | V | b/h=4m | Asia: W-China |
| 36 | Rhododendren, Alpenrosen (Rhododendron spec) | V | b/h=1-2m | cult. |
| 37 | Rhododendron sutchuenense | A IV | b/h=1-8m | Asia: W-China |
| 38 | Sumpfporst (Rhododendron tomentosum) | V | b/h=0,3-1m | Europe, Asia |
| 39 | Rhododendron williamsianum | IV | b/h=1-1,5m | Asia: Sichuan |
| 40 | Rhododendron 'Catawbiense Grandiflorum' | V | b/h=2-3m | cult. (Parentage uncertain, R. catawbiense hybrid or selection) |
| 41 | Rhododendron 'Cunninghams White' | M/E IV-V | b/h=2-3m | cult. (R. caucasicum x R. ponticum var. album) |
| 42 | Rhododendron 'Gartendirektor Rieger' | IV | b/h=1m | cult. (R. 'Adriaan Koster' x R. williamsianum) |
| 43 | Rhododendron 'Nova Zembla' | M/E V | b/h=2-3m | cult. (Parentage uncertain, R. 'Parsons Grandiflorum' x red seedling) |
| 44 | Rhododendron 'Peter John Mezitt' | M/E III-IV | b/h=2m | cult. (R. dauricum x R. minus) |
| 45 | Rhododendron 'Praecox' | M/E III-IV | b/h=1-2m | cult. (Parentage uncertain, possibly R. dauricum x R. ciliatum) |
| 46 | Rhododendron 'Ptarmigan' | III | b/h=0,5-1m | cult. (R. leucaspis x R. microleucum) |
| 47 | Rhododendron 'Roseum Elegans' | V | b/h=2-3m | cult. (Parentage uncertain, possibly R. catawbiense hybrid) |
| 48 | Rhododendron 'Scarlet Wonder' | IV | b/h=1/0,5m | cult. (R. 'Essex Scarlet' x R. forrestii subsp. forrestii) |
| 49 | Rhododendron xgeraldii | III-IV | b/h=(2-)3(-7)m | Asia: China, Hubei (R. sutchuenense x R. praevernum) |
| 50 | Japanische Azaleen, Stumpfblättrige Azalee (Rhododendron xobtusum) | V | b/h=1m | cult. |
| 51 | Rhododendron yunnanense | V | b/h=>2/>3m | Asia: W-China |