For rhododendron hybridisers

Hybridisers - Seed-species - Pollen-species - Seed-hybrid - Pollen-hybrid -   Hybrids/year - Back

All hybrid data based on IRRC, JARS or ICRA.?
The International Rhododendron Register and Checklist, Royal Horticultural Society.

Journal of the American Rhododendron Society

International Cultivar Registration Authority

For questions, suggestion or comments do not hesitate to email.

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Most popular species pollen-parent
1R. degronianum ssp yakushimanum ( Hymenanthes, Pontica, Pontica)102
2R. griersonianum ( Hymenanthes, Pontica, Griersoniana)97
3R. fortunei ssp fortunei ( Hymenanthes, Pontica, Fortunea)82
4R. griffithianum ( Hymenanthes, Pontica, Fortunea)75
5R. williamsianum ( Hymenanthes, Pontica, Williamsiana)75
6R. wardii var wardii ( Hymenanthes, Pontica, Campylocarpa)70
7R. fortunei ssp discolor ( Hymenanthes, Pontica, Fortunea)59
8R. javanicum ssp javanicum ( Rhododendron, Vireya, Euvireya)44
9R. zoelleri ( Rhododendron, Vireya, Euvireya)40
10R. arboreum ssp arboreum ( Hymenanthes, Pontica, Arborea)39
11R. kaempferi ( Tsutsusi, Tsutsusi, )36
12R. haematodes ssp haematodes ( Hymenanthes, Pontica, Neriiflora)35
13R. smirnowii ( Hymenanthes, Pontica, Pontica)33
14R. konori var konori ( Rhododendron, Vireya, Euvireya)33
15R. catawbiense ( Hymenanthes, Pontica, Pontica)33
16R. laetum ( Rhododendron, Vireya, Euvireya)32
17R. forrestii Repens Group ( Hymenanthes, Pontica, Neriiflora)31
18R. molle ssp japonicum ( Pentanthera, Pentanthera, Sinensia)31
19R. campylocarpum ssp campylocarpum ( Hymenanthes, Pontica, Campylocarpa)30
20R. arborescens ( Pentanthera, Pentanthera, Pentanthera)30
21R. leucogigas ( Rhododendron, Vireya, Euvireya)30
22R. elliottii ( Hymenanthes, Pontica, Parishia)29
23R. facetum ( Hymenanthes, Pontica, Parishia)26
24R. strigillosum ( Hymenanthes, Pontica, Maculifera)26
25R. thomsonii ssp thomsonii ( Hymenanthes, Pontica, Thomsonia)24
26R. aurigeranum ssp aurigeranum ( Rhododendron, Vireya, Euvireya)24
27R. calophytum var calophytum ( Hymenanthes, Pontica, Fortunea)23
28R. macabeanum ( Hymenanthes, Pontica, Grandia)23
29R. macgregoriae ( Rhododendron, Vireya, Euvireya)22
30R. decorum ssp decorum ( Hymenanthes, Pontica, Fortunea)21
31R. augustinii ssp augustinii ( Rhododendron, Rhododendron, Triflora)20
32R. racemosum ( Rhododendron, Rhododendron, Scabrifolia)19
33R. maximum ( Hymenanthes, Pontica, Pontica)19
34R. dauricum ( Rhododendron, Rhododendron, Rhodorastra)18
35R. dichroanthum ssp dichroanthum ( Hymenanthes, Pontica, Neriiflora)18
36R. proteoides ( Hymenanthes, Pontica, Taliensia)17
37R. ponticum ( Hymenanthes, Pontica, Pontica)17
38R. auriculatum ( Hymenanthes, Pontica, Auriculata)16
39R. austrinum ( Pentanthera, Pentanthera, Pentanthera)16
40R. jasminiflorum ssp jasminiflorum ( Rhododendron, Vireya, Euvireya)16
41R. moupinense ( Rhododendron, Rhododendron, Moupinensia)16
42R. yedoense var poukhanense ( Tsutsusi, Tsutsusi, )16
43R. christianae ( Rhododendron, Vireya, Euvireya)15
44R. viriosum ( Rhododendron, Vireya, Euvireya)15
45R. sutchuenense ( Hymenanthes, Pontica, Fortunea)14
46R. dichroanthum ssp scyphocalyx ( Hymenanthes, Pontica, Neriiflora)14
47R. javanicum ssp teysmannii ( Rhododendron, Vireya, Euvireya)13
48R. lacteum ( Hymenanthes, Pontica, Taliensia)13
49R. wardii Litiense Group ( Hymenanthes, Pontica, Campanulata)12
50R. commonae ( Rhododendron, Vireya, Euvireya)12
51R. mucronatum var mucronatum ( Tsutsusi, Tsutsusi, )12
52R. keiskei ( Rhododendron, Rhododendron, Triflora)11
53R. bureavii ( Hymenanthes, Pontica, Taliensia)11
54R. ciliatum ( Rhododendron, Rhododendron, Maddenia)11
55R. molle ssp molle ( Pentanthera, Pentanthera, Sinensia)11
56R. neriiflorum ssp neriiflorum ( Hymenanthes, Pontica, Neriiflora)11
57R. periclymenoides ( Pentanthera, Pentanthera, Pentanthera)10
58R. edgeworthii ( Rhododendron, Rhododendron, Edgeworthia)10
59R. mucronulatum var mucronulatum ( Rhododendron, Rhododendron, Rhodorastra)10
60R. viscosum ( Pentanthera, Pentanthera, Pentanthera)10
61R. nuttallii ( Rhododendron, Rhododendron, Maddenia)10
62R. prinophyllum ( Pentanthera, Pentanthera, Pentanthera)10
63R. leucaspis ( Rhododendron, Rhododendron, Boothia)9
64R. hyperythrum ( Hymenanthes, Pontica, Pontica)9
65R. burmanicum ( Rhododendron, Rhododendron, Maddenia)9
66R. cinnabarinum ssp xanthocodon Concatenans Group ( Rhododendron, Rhododendron, Cinnabarina)9
67R. sanguineum ssp sanguineum var haemaleum ( Hymenanthes, Pontica, Neriiflora)9
68R. insigne ( Hymenanthes, Pontica, Argyrophylla)8
69R. dauricum Sempervirens Group ( Rhododendron, Rhododendron, Rhodorastra)8
70R. indicum ( Tsutsusi, Tsutsusi, )8
71R. brachycarpum ssp tigerstedtii ( Hymenanthes, Pontica, Pontica)8
72R. minus Carolinianum Group ( Rhododendron, Rhododendron, Caroliniana)8
73R. gracilentum ( Rhododendron, Vireya, Euvireya)8
74R. fastigiatum ( Rhododendron, Rhododendron, Lapponica)8
75R. formosum var formosum ( Rhododendron, Rhododendron, Maddenia)8
76R. oreodoxa var fargesii ( Hymenanthes, Pontica, Fortunea)7
77R. decorum ssp diaprepes ( Hymenanthes, Pontica, Fortunea)7
78R. konori var phaeopeplum ( Rhododendron, Vireya, Euvireya)7
79R. pachysanthum ( Hymenanthes, Pontica, Maculifera)7
80R. cumberlandense ( Pentanthera, Pentanthera, Pentanthera)7
81R. saxifragoides ( Rhododendron, Vireya, Euvireya)7
82R. kiusianum var kiusianum ( Tsutsusi, Tsutsusi, )7
83R. valentinianum ( Rhododendron, Rhododendron, Maddenia)7
84R. cinnabarinum ssp xanthocodon ( Rhododendron, Rhododendron, Cinnabarina)7
85R. forrestii ssp forrestii ( Hymenanthes, Pontica, Neriiflora)7
86R. vernicosum ( Hymenanthes, Pontica, Fortunea)7
87R. kyawii ( Hymenanthes, Pontica, Parishia)7
88R. calendulaceum ( Pentanthera, Pentanthera, Pentanthera)6
89R. sinogrande ( Hymenanthes, Pontica, Grandia)6
90R. souliei ( Hymenanthes, Pontica, Campylocarpa)6
91R. aureum var aureum ( Hymenanthes, Pontica, Pontica)6
92R. maddenii ssp maddenii ( Rhododendron, Rhododendron, Maddenia)6
93R. dalhousiae var dalhousiae ( Rhododendron, Rhododendron, Maddenia)6
94R. neriiflorum ssp neriiflorum Euchaites Group ( Hymenanthes, Pontica, Neriiflora)6
95R. davidsonianum ( Rhododendron, Rhododendron, Triflora)6
96R. barbatum ( Hymenanthes, Pontica, Barbata)6
97R. occidentale ( Pentanthera, Pentanthera, Pentanthera)6
98R. impeditum ( Rhododendron, Rhododendron, Lapponica)5
99R. lochiae ( Rhododendron, Vireya, Euvireya)5
100R. lutescens ( Rhododendron, Rhododendron, Triflora)5
101R. luteum ( Pentanthera, Pentanthera, Pentanthera)5
102R. lindleyi ( Rhododendron, Rhododendron, Maddenia)5
103R. nakaharae ( Tsutsusi, Tsutsusi, )5
104R. grande ( Hymenanthes, Pontica, Grandia)5
105R. rubineiflorum ( Rhododendron, Vireya, Euvireya)5
106R. campanulatum ssp campanulatum ( Hymenanthes, Pontica, Campanulata)5
107R. orbiculare ssp orbiculare ( Hymenanthes, Pontica, Fortunea)5
108R. fletcherianum ( Rhododendron, Rhododendron, Maddenia)5
109R. aberconwayi ( Hymenanthes, Pontica, Irrorata)5
110R. viscidifolium ( Hymenanthes, Pontica, Thomsonia)5
111R. herzogii ( Rhododendron, Vireya, Euvireya)5
112R. hookeri ( Hymenanthes, Pontica, Thomsonia)5
113R. degronianum ssp degronianum ( Hymenanthes, Pontica, Pontica)5
114R. campylocarpum Elatum Group ( Hymenanthes, Pontica, Campylocarpa)5
115R. canescens ( Pentanthera, Pentanthera, Pentanthera)5
116R. virgatum ssp virgatum ( Rhododendron, Rhododendron, Virgata)4
117R. oldhamii ( Tsutsusi, Tsutsusi, )4
118R. maddenii ssp crassum ( Rhododendron, Rhododendron, Maddenia)4
119R. sperabile var sperabile ( Hymenanthes, Pontica, Neriiflora)4
120R. falconeri ssp eximium ( Hymenanthes, Pontica, Falconera)4
121R. ludlowii ( Rhododendron, Rhododendron, Uniflora)4
122R. venator ( Hymenanthes, Pontica, Venatora)4
123R. stenophyllum ssp stenophyllum ( Rhododendron, Vireya, Euvireya)4
124R. brachycarpum ssp brachycarpum ( Hymenanthes, Pontica, Pontica)4
125R. meddianum var meddianum ( Hymenanthes, Pontica, Thomsonia)4
126R. makinoi ( Hymenanthes, Pontica, Pontica)4
127R. tsariense ( Hymenanthes, Pontica, Lanata)4
128R. christi ( Rhododendron, Vireya, Euvireya)4
129R. irroratum ssp irroratum ( Hymenanthes, Pontica, Irrorata)4
130R. simsii var simsii ( Tsutsusi, Tsutsusi, )4
131R. pseudochrysanthum ( Hymenanthes, Pontica, Maculifera)4
132R. beanianum ( Hymenanthes, Pontica, Neriiflora)4
133R. leptanthum ( Rhododendron, Vireya, Euvireya)4
134R. flammeum ( Pentanthera, Pentanthera, Pentanthera)4
135R. polycladum Scintillans Group ( Rhododendron, Rhododendron, Lapponica)4
136R. rex ssp rex ( Hymenanthes, Pontica, Falconera)4
137R. arboreum ssp cinnamomeum ( Hymenanthes, Pontica, Arborea)3
138R. dichroanthum ssp apodectum ( Hymenanthes, Pontica, Neriiflora)3
139R. rex ssp fictolacteum ( Hymenanthes, Pontica, Falconera)3
140R. ambiguum ( Rhododendron, Rhododendron, Triflora)3
141R. superbum ssp superbum ( Rhododendron, Vireya, Euvireya)3
142R. ciliicalyx ssp ciliicalyx ( Rhododendron, Rhododendron, Maddenia)3
143R. pemakoense ( Rhododendron, Rhododendron, Uniflora)3
144R. hemsleyanum ( Hymenanthes, Pontica, Fortunea)3
145R. cinnabarinum ssp cinnabarinum ( Rhododendron, Rhododendron, Cinnabarina)3
146R. lanatum ( Hymenanthes, Pontica, Lanata)3
147R. caucasicum ( Hymenanthes, Pontica, Pontica)3
148R. brookeanum ssp brookeanum ( Rhododendron, Vireya, Euvireya)3
149R. arboreum ssp delavayi ( Hymenanthes, Pontica, Arborea)3
150R. Sir Charles Lemon ( Hymenanthes, Pontica, Arborea)3
151R. arboreum Kingianum Group ( Hymenanthes, Pontica, Arborea)3
152R. arboreum ssp zeylanicum ( Hymenanthes, Pontica, Arborea)3
153R. minus var minus ( Rhododendron, Rhododendron, Caroliniana)3
154R. bagobonum ( Rhododendron, Vireya, Euvireya)3
155R. hanceanum Nanum Group ( Rhododendron, Rhododendron, Tephroplepa)3
156R. brookeanum ssp brookeanum var gracile ( , , )3
157R. kaempferi ( , , )3
158R. lapponicum ( Rhododendron, Rhododendron, Lapponica)3
159R. spinuliferum ( Rhododendron, Rhododendron, Scabrifolia)3
160R. diphrocalyx ( Hymenanthes, Pontica, Glischra)3
161R. praevernum ( Hymenanthes, Pontica, Fortunea)3
162R. retusum var retusum ( Rhododendron, Discovireya, )3
163R. niveum ( Hymenanthes, Pontica, Arborea)3
164R. falconeri ssp falconeri ( Hymenanthes, Pontica, Falconera)2
165R. campylogynum ( Rhododendron, Rhododendron, Campylogyna)2
166R. carringtoniae ( , , )2
167R. horaeum ( Hymenanthes, Pontica, Neriiflora)2
168R. haematodes ssp chaetomallum ( Hymenanthes, Pontica, Neriiflora)2
169R. morii ( Hymenanthes, Pontica, Maculifera)2
170R. intranervatum ( Rhododendron, Vireya, Euvireya)2
171R. culminicola var culminicola ( Rhododendron, Vireya, Euvireya)2
172R. aureum ( , , )2
173R. flavidum ( Rhododendron, Rhododendron, Lapponica)2
174R. mekongense var mekongense ( Rhododendron, Rhododendron, Trichoclada)2
175R. galactinum ( Hymenanthes, Pontica, Falconera)2
176R. keysii ( Rhododendron, Rhododendron, Cinnabarina)2
177R. xanthostephanum ( Rhododendron, Rhododendron, Tephroplepa)2
178R. russatum ( Rhododendron, Rhododendron, Lapponica)2
179R. magnificum ( Hymenanthes, Pontica, Grandia)2
180R. boothii ( Rhododendron, Rhododendron, Boothia)2
181R. floccigerum ( Hymenanthes, Pontica, Neriiflora)2
182R. loranthiflorum ssp loranthiflorum ( Rhododendron, Vireya, Euvireya)2
183R. johnstoneanum ( Rhododendron, Rhododendron, Maddenia)2
184R. basilicum ( Hymenanthes, Pontica, Falconera)2
185R. atlanticum ( Pentanthera, Pentanthera, Pentanthera)2
186R. cinnabarinum ssp cinnabarinum Roylei Group ( Rhododendron, Rhododendron, Cinnabarina)2
187R. calostrotum ssp riparioides ( Rhododendron, Rhododendron, Saluenensia)2
188R. roxieanum var roxieanum ( Hymenanthes, Pontica, Taliensia)2
189R. ungernii ( Hymenanthes, Pontica, Pontica)2
190R. campylocarpum ssp caloxanthum ( Hymenanthes, Pontica, Campylocarpa)2
191R. glaucophyllum var glaucophyllum ( Rhododendron, Rhododendron, Glauca)2
192R. sulfureum ( Rhododendron, Rhododendron, Boothia)2
193R. chrysodoron ( Rhododendron, Rhododendron, Boothia)2
194R. pocophorum var pocophorum ( Hymenanthes, Pontica, Neriiflora)2
195R. longiflorum var longiflorum ( Rhododendron, Vireya, Euvireya)2
196R. augustinii ssp chasmantum ( Rhododendron, Rhododendron, Triflora)2
197R. oreodoxa var oreodoxa ( Hymenanthes, Pontica, Fortunea)2
198R. orbiculatum ( Rhododendron, Vireya, Euvireya)2
199R. anwheiense ( Hymenanthes, Pontica, Maculifera)2
200R. multicolor ( Rhododendron, Vireya, Euvireya)2
201R. malayanum var malayanum f malayanum ( Rhododendron, Vireya, Malayovireya)2
202R. yunnanense ( Rhododendron, Rhododendron, Triflora)2
203R. prunifolium ( Pentanthera, Pentanthera, Pentanthera)2
204R. lobbii ( , , )2
205R. pseudonitens ( , , )2
206R. ferrugineum ( Rhododendron, Rhododendron, Rhododendron)2
207R. jasminiflorum var punctatum ( Rhododendron, Vireya, Euvireya)2
208R. solitarium ( Rhododendron, Vireya, Euvireya)2
209R. detonsum ( Hymenanthes, Pontica, Taliensia)2
210R. scabrifolium var spiciferum ( Rhododendron, Rhododendron, Scabrifolia)2
211R. aequabile ( Rhododendron, Vireya, Euvireya)2
212R. wightii ( Hymenanthes, Pontica, Taliensia)2
213R. cinnabarinum ssp cinnabarinum Blandfordiiflorum ( Rhododendron, Rhododendron, Cinnabarina)2
214R. lepidotum ( Rhododendron, Rhododendron, Lepidota)1
215R. dalhousiae var rhabdotum ( Rhododendron, Rhododendron, Maddenia)1
216R. womersleyi ( Rhododendron, Vireya, Euvireya)1
217R. maddenii ssp maddenii Polyandrum Group ( Rhododendron, Rhododendron, Maddenia)1
218R. eclecteum var eclecteum ( Hymenanthes, Pontica, Thomsonia)1
219R. macrophyllum ( Hymenanthes, Pontica, Pontica)1
220R. viridescens ( Rhododendron, Rhododendron, Trichoclada)1
221R. pachypodum ( Rhododendron, Rhododendron, Maddenia)1
222R. spilotum ( Hymenanthes, Pontica, Glischra)1
223R. myrtifolium ( Rhododendron, Rhododendron, Rhododendron)1
224R. concinnum var benthamianum ( , , )1
225R. dielsianum var dielsianum ( Rhododendron, Vireya, Euvireya)1
226R. formosum var inaequale ( Rhododendron, Rhododendron, Maddenia)1
227R. hirtipes ( Hymenanthes, Pontica, Selensia)1
228R. dendrocharis ( Rhododendron, Rhododendron, Moupinensia)1
229R. dauricum var sempervirens ( , , )1
230R. trichostomum ( Rhododendron, Pogonanthum, )1
231R. mallotum ( Hymenanthes, Pontica, Neriiflora)1
232R. ( , Pontica, Neriiflora)1
233R. taggianum ( Rhododendron, Rhododendron, Maddenia)1
234R. taliense ( Hymenanthes, Pontica, Taliensia)1
235R. trichocladum ( Rhododendron, Rhododendron, Trichoclada)1
236R. multicolor var curtisii ( , , )1
237R. callimorphum var callimorphum ( Hymenanthes, Pontica, Campylocarpa)1
238R. polyanthemum ( Rhododendron, Vireya, Euvireya)1
239R. macrosepalum ( Tsutsusi, Tsutsusi, )1
240R. pemakoense Patulum Group ( Rhododendron, Rhododendron, Uniflora)1
241R. adenogynum ( Hymenanthes, Pontica, Taliensia)1
242R. luteiflorum ( Rhododendron, Rhododendron, Glauca)1
243R. geraldii ( Hymenanthes, Pontica, Fortunea)1
244R. mucronatum var ripense ( Tsutsusi, Tsutsusi, )1
245R. alabamense ( , , )1
246R. salicifolium ( Rhododendron, Vireya, Euvireya)1
247R. luciferum ( Hymenanthes, Pontica, Lanata)1
248R. mollicomum ( Rhododendron, Rhododendron, Scabrifolia)1
249R. cuffeanum ( Rhododendron, Rhododendron, Maddenia)1
250R. hanceanum ( Rhododendron, Rhododendron, Tephroplepa)1
251R. groenlandicum ( Rhododendron, Rhododendron, Ledum)1
252R. anagalliflorum ( Rhododendron, Vireya, Euvireya)1
253R. pachytrichum ( Hymenanthes, Pontica, Maculifera)1
254R. saluenense ssp saluenense ( Rhododendron, Rhododendron, Saluenensia)1
255R. hodgsonii ( Hymenanthes, Pontica, Falconera)1
256R. makinoi ( , , )1
257R. concinnum ( Rhododendron, Rhododendron, Triflora)1
258R. sanguineum ssp sanguineum var sanguineum ( Hymenanthes, Pontica, Neriiflora)1
259R. orthocladum var microleucum ( Rhododendron, Rhododendron, Lapponica)1
260R. chlorops ( , , )1
261R. hellwigii ( Rhododendron, Vireya, Euvireya)1
262R. rhodoleucum ( Rhododendron, Vireya, Euvireya)1
263R. orbiculare ssp cardiobasis ( Hymenanthes, Pontica, Fortunea)1
264R. degronianum ssp heptamerum ( Hymenanthes, Pontica, Pontica)1
265R. brachycarpum ssp fauriei f nematoanum ( Hymenanthes, Pontica, Pontica)1
266R. brachycarpum ( , , )1
267R. pauciflorum ( Rhododendron, Vireya, Euvireya)1
268R. multinervium ( Rhododendron, Vireya, Euvireya)1
269R. sulphureum ( , , )1
270R. wardii var puralbum ( Hymenanthes, Pontica, Campylocarpa)1
271R. arboreum ssp cinnamomeum var cinnamomeum ( Hymenanthes, Pontica, Arborea)1
272R. montroseanum ( Hymenanthes, Pontica, Grandia)1
273R. floribundum ( Hymenanthes, Pontica, Argyrophylla)1
274R. crassifolium var crassifolium ( Rhododendron, Vireya, Euvireya)1
275R. rothschildii ( Hymenanthes, Pontica, Falconera)1
276R. ( , Pontica, Falconera)1
277R. wiltonii ( Hymenanthes, Pontica, Taliensia)1
278R. scabrum ssp scabrum ( Tsutsusi, Tsutsusi, )1
279R. pronum ( Hymenanthes, Pontica, Taliensia)1
280R. anthosphaerum ( Hymenanthes, Pontica, Irrorata)1
281R. polycladum ( Rhododendron, Rhododendron, Lapponica)1
282R. hippophaeoides var hippophaeoides ( Rhododendron, Rhododendron, Lapponica)1
283R. hirsutum ( Rhododendron, Rhododendron, Rhododendron)1
284R. mekongense var mekongense Viridescens Group ( Rhododendron, Rhododendron, Trichoclada)1
285R. campylogynum Cremastum Group ( Rhododendron, Rhododendron, Campylogyna)1
286R. praetervisum ( Rhododendron, Vireya, Euvireya)1
287R. aperantum ( Hymenanthes, Pontica, Neriiflora)1
288R. weyrichii ( Tsutsusi, Brachycalyx, )1
289R. zaleucum var zaleucum ( Rhododendron, Rhododendron, Triflora)1
290R. fortunei ssp discolor Houlstonii Group ( Hymenanthes, Pontica, Fortunea)1
291R. degronianum ssp heptamerum var hondoense ( Hymenanthes, Pontica, Pontica)1
292R. virgatum ssp oleifolium ( Rhododendron, Rhododendron, Virgata)1
293R. viscosum Serrulatum Group ( Pentanthera, Pentanthera, Pentanthera)1
294R. calostrotum ssp calostrotum ( Rhododendron, Rhododendron, Saluenensia)1
295R. praestans ( Hymenanthes, Pontica, Grandia)1
296R. microgynum ( Hymenanthes, Pontica, Neriiflora)1
297R. eriogynum ( , , )1
298R. kosterianum ( Pentanthera, Pentanthera, Sinensia)1
299R. moulmainense ( Azaleastrum, Choniastrum, )1
300R. longesquamatum ( Hymenanthes, Pontica, Maculifera)1
301R. alabamense ( Pentanthera, Pentanthera, Pentanthera)1
302R. tephropeplum ( Rhododendron, Rhododendron, Tephroplepa)1
303R. yakushimanum ( , , )1
304R. phaeochitum ( Rhododendron, Vireya, Euvireya)1
305R. stewartianum ( Hymenanthes, Pontica, Thomsonia)1
306R. brachyanthum ssp hypolepidotum ( Rhododendron, Rhododendron, Glauca)1
307R. faberi ( Hymenanthes, Pontica, Taliensia)1
308R. glischrum ssp glischrum ( Hymenanthes, Pontica, Glischra)1
309R. triflorum var triflorum ( Rhododendron, Rhododendron, Triflora)1
310R. rubiginosum ( Rhododendron, Rhododendron, Heliolepida)1
311R. inconspicuum ( Rhododendron, Vireya, Euvireya)1
312R. veitchianum ( Rhododendron, Rhododendron, Maddenia)1
313R. thayerianum ( Hymenanthes, Pontica, Argyrophylla)1
314R. rubiginosum Desquamatum Group ( Rhododendron, Rhododendron, Heliolepida)1
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Listed Hybrids / cultivars2037656.605 %
Groups (formerly grex)661
Unregistered hybrids What?
Unregistered Hybrids

This category involves:
  • all named hybrids that have no registration in the IRRC, ICRA or JARS
  • all unnamed crosses (like: 'yakushimanum x bureavii')

Listed Hybrids + hybridizer-details1486272.945 %
Listed Hybrids + picture417620.495 %

Estimated total number of hybrids = 36.000

Last 2 hybrid pictures added to hirsutum database:

R. 'Proteo-pron' (Thompsonís Nursery Waldport, Oregon USA)

Photo by: Harold E. Greer
Location: Greer Gardens, Eugene, USA 11 May, 2008

R. 'Odoratum' (Thompson, London , 1869)

Photo by: Harold E. Greer
Location: Greer Gardens, Eugene, USA 15 May, 1988

Last species picture added to hirsutum database
R. acrophilum

Photo by:

Photo Everard Daniel, Sherwood Garden, UK

Photo Tijs Huisman, Round Bald, Roan Mountain
North Carolina USA, June 19 2006

Photo Everard Daniel, Sheffield Park gardens, Sussex (National Trust) , UK
Rhododendron G.A. Sims, May 30 2004

Photo Yves Tuset, Leonardslee , UK
Rhododendron 'Smithii Group' with wallabies, April 2003
_____________________________________________________________________________________________________________________________________     Project started 03 June 2009