| Entry | Volume | Pages |
|---|---|---|
| Rhododendron | 52 | 74-85* |
| Rhododendron 'Bryn Mair' (racemosum x ? 'Yaku Fairy') | 83 | 240, 241C |
| Rhododendron 'Egret' | 83 | 132, 133C |
| Rhododendron 'Loderi King George' | 82 | 106 |
| Rhododendron 'Sarled' (= R. sargentianum x trichostomum) | 82 | 449, 450C |
| Rhododendron (SBEC 519) | 62 | 216 |
| Rhododendron achroanthum | 21 | 59 |
| Rhododendron achroanthum | 27 | 254 |
| Rhododendron adamsii | 43 | 279 |
| Rhododendron adenogynum | 56 | 120, 121, 125C, 129-30, 222 |
| Rhododendron afghanicum | 67 | 319 |
| Rhododendron aganniphum | 75 | 354, 361, 362 |
| Rhododendron agganiphum | 64 | 250 |
| Rhododendron albiflorum | 15 | 247P, 251 |
| Rhododendron albiflorum | 20 | 308 |
| Rhododendron albiflorum | 23 | 396 |
| Rhododendron albiflorum | 24 | 32 |
| Rhododendron albiflorum | 25 | 47 |
| Rhododendron albiflorum | 51 | 347 |
| Rhododendron albiflorum | 59 | 306, 310 |
| Rhododendron albrechtii | 22 | 32 |
| Rhododendron albrechtii | 55 | 316 |
| Rhododendron albrechtii | 57 | 218 |
| Rhododendron anagalliflorum | 47 | 59, 198, 199P, 314 |
| Rhododendron anagalliflorum | 58 | 245 |
| Rhododendron anthopogon | 14 | 133, 231P |
| Rhododendron anthopogon | 16 | 53 |
| Rhododendron anthopogon | 18 | 59 |
| Rhododendron anthopogon | 22 | 219 |
| Rhododendron anthopogon | 26 | 320 |
| Rhododendron anthopogon | 27 | 253 |
| Rhododendron anthopogon | 41 | 68, 71, 263 |
| Rhododendron anthopogon | 42 | 312 |
| Rhododendron anthopogon | 52 | 75, 77, 197, 213, 216, 239, 264, 273, 274 |
| Rhododendron anthopogon | 53 | 316 |
| Rhododendron anthopogon | 65 | 51 |
| Rhododendron anthopogon | 67 | 183 |
| Rhododendron anthopogon | 72 | 256, 283, 286, 303 |
| Rhododendron anthopogon | 75 | 320C, 338, 432 |
| Rhododendron anthopogon | 83 | 172 |
| Rhododendron anthopogon subsp. anthopogon | 75 | 321 |
| Rhododendron anthopogon subsp. hypenanthum | 72 | 244 |
| Rhododendron anthopogon subsp. hypenanthum | 75 | 321 |
| Rhododendron anthopogon subsp. hypenanthum 'Annapurna' | 72 | 309 |
| Rhododendron anthopogon 'Wendy Dennis' | 64 | 443-444P.C. |
| Rhododendron anthopogonoides | 55 | 148 |
| Rhododendron aperantum | 1 | 109, 183 |
| Rhododendron aperantum | 2 | 53, 139 |
| Rhododendron aperantum | 9 | 314P, 325 |
| Rhododendron aperantum | 72 | 304 |
| Rhododendron arboreum | 18 | 59 |
| Rhododendron arboreum | 23 | 231 |
| Rhododendron arboreum | 34 | 319 |
| Rhododendron arboreum | 41 | 65 |
| Rhododendron arboreum | 55 | 212, 299, 303 |
| Rhododendron arboreum | 58 | 126 |
| Rhododendron arboreum | 72 | 273 |
| Rhododendron 'Arctic Tern' | 62 | 216 |
| Rhododendron argyrophyllum var. nankingense | 29 | 35 |
| Rhododendron arizelum | 75 | 357 |
| Rhododendron arizelum | 77 | 165, 168C |
| Rhododendron 'Arthur Osborne' | 23 | 371 |
| Rhododendron atropurpureum | 49 | 76 |
| Rhododendron atropurpureum | 58 | 245 |
| Rhododendron 'Augfast' | 56 | 135 |
| Rhododendron augustinii | 27 | 256 |
| Rhododendron augustinii | 53 | 208 |
| Rhododendron augustinii | 60 | 62 |
| Rhododendron augustinii | 70 | 279C, 306 |
| Rhododendron augustinii | 80 | 300 |
| Rhododendron augustinii var. chasmanthum | 82 | 134 |
| Rhododendron augustinii hybrid | 27 | 256 |
| Rhododendron aureum | 43 | 272, 275 |
| Rhododendron aureum | 55 | 316 |
| Rhododendron aureum | 57 | 215, 217-18, 219, 220 |
| Rhododendron aureum | 73 | 260 |
| Rhododendron aurigeranum | 47 | 57 |
| Rhododendron balangense | 60 | 67 |
| Rhododendron balangense | 70 | 305C |
| Rhododendron balfourianum | 12 | 117P |
| Rhododendron barbatum | 18 | 59 |
| Rhododendron barbatum | 55 | 212 |
| Rhododendron barbatum | 62 | 111 |
| Rhododendron beesianum | 56 | 295 |
| Rhododendron beesianum | 64 | 251 |
| Rhododendron beyerinckianum | 47 | 59 |
| Rhododendron beyerinckianum | 49 | 75 |
| Rhododendron bhutanense | 72 | 302C |
| Rhododendron 'Blue Diamond' | 19 | 150 |
| Rhododendron 'Blue Diamond' | 27 | 256, 314 |
| Rhododendron 'Blue Tit' | 19 | 150 |
| Rhododendron 'Blue Tit' | 27 | 256 |
| Rhododendron 'Bluebird' | 27 | 256 |
| Rhododendron boothi | 72 | 304 |
| Rhododendron brachycarpum | 55 | 316 |
| Rhododendron brachycarpum | 57 | 216 |
| Rhododendron brachycarpum roseum | 57 | 216 |
| Rhododendron 'Bric-a-Brac' | 21 | 146 |
| Rhododendron calciphilum | 8 | 130 |
| Rhododendron calendulaceum | 45 | 262 |
| Rhododendron calendulaceum | 74 | 47 |
| Rhododendron callimorphum | 1 | 109 |
| Rhododendron calophytum | 53 | 208 |
| Rhododendron calophytum | 70 | 306 |
| Rhododendron calostrotum | 1 | 107P, 115, 183 |
| Rhododendron calostrotum | 2 | 53, 139, 375 |
| Rhododendron calostrotum | 15 | 129 |
| Rhododendron calostrotum | 19 | 147 |
| Rhododendron calostrotum | 30 | 36 |
| Rhododendron calostrotum | 34 | 339 |
| Rhododendron calostrotum | 36 | 339 |
| Rhododendron calostrotum | 37 | 343 |
| Rhododendron calostrotum | 46 | 119 |
| Rhododendron calostrotum | 56 | 69, 79 |
| Rhododendron calostrotum | 60 | 313, 314C |
| Rhododendron calostrotum | 72 | 313 |
| Rhododendron calostrotum | 75 | 358C, 359C |
| Rhododendron calostrotum 'Gigha' | 51 | 38 |
| Rhododendron calostrotum 'Gigha' | 55 | 115 |
| Rhododendron calostrotum 'Gigha' | 59 | 340 |
| Rhododendron calostrotum 'Gigha' | 78 | 155C |
| Rhododendron calostrotum subsp. keleticum | 78 | 155, 520 |
| Rhododendron calostrotum subsp. keleticum | 83 | 466C |
| Rhododendron calostrotum subsp. riparium | 75 | 354, 358, 359 |
| Rhododendron caloxanthum | 1 | 209P |
| Rhododendron camelliaeflorum | 41 | 260 |
| Rhododendron camelliaeflorum | 52 | 281, 282 |
| Rhododendron camelliaeflorum | 72 | 296 |
| Rhododendron campanulatum | 18 | 59 |
| Rhododendron campanulatum | 34 | 320 |
| Rhododendron campanulatum | 41 | 257 |
| Rhododendron campanulatum | 49 | 218 |
| Rhododendron campanulatum | 52 | 213, 237, 277 |
| Rhododendron campanulatum | 55 | 212 |
| Rhododendron campanulatum | 62 | 104 |
| Rhododendron campanulatum | 67 | 197 |
| Rhododendron campanulatum | 72 | 247 |
| Rhododendron campanulatum | 83 | 131, 171 |
| Rhododendron campylocarpum | 41 | 257 |
| Rhododendron campylocarpum | 52 | 277 |
| Rhododendron campylocarpum | 64 | 163 |
| Rhododendron campylocarpum | 74 | 198 |
| Rhododendron campylocarpum | 75 | 353 |
| Rhododendron campylocarpum x caloxanthum | 60 | 313 |
| Rhododendron campylocarpum subsp. caloxanthum | 77 | 165C* |
| Rhododendron campylogynum | 19 | 148 |
| Rhododendron campylogynum | 27 | 253 |
| Rhododendron campylogynum | 33 | 202 |
| Rhododendron campylogynum | 51 | 145 |
| Rhododendron campylogynum | 67 | 445C |
| Rhododendron campylogynum | 70 | 351 |
| Rhododendron campylogynum | 72 | 327 |
| Rhododendron campylogynum | 79 | 65 |
| Rhododendron campylogynum var. leucanthum | 78 | 519C |
| Rhododendron campylogynum var. myrtilloides | 29 | R 33 |
| Rhododendron campylogynum var. myrtilloides | 58 | 55, 61C |
| Rhododendron camtschaticum | 2 | 374P |
| Rhododendron camtschaticum | 4 | 69, 71P |
| Rhododendron camtschaticum | 8 | 130 |
| Rhododendron camtschaticum | 11 | 179P |
| Rhododendron camtschaticum | 19 | 149 |
| Rhododendron camtschaticum | 23 | 85, 252 |
| Rhododendron camtschaticum | 28 | 67 |
| Rhododendron camtschaticum | 46 | 119 |
| Rhododendron camtschaticum | 50 | 238 |
| Rhododendron camtschaticum | 55 | 311C, 316 |
| Rhododendron camtschaticum | 57 | 210, 219, 220 |
| Rhododendron camtschaticum | 60 | 294 |
| Rhododendron camtschaticum | 63 | 153 |
| Rhododendron camtschaticum | 69 | 440 |
| Rhododendron camtschaticum | 71 | 122 |
| Rhododendron camtschaticum | 73 | 100 |
| Rhododendron canadense | 79 | 495 |
| Rhododendron cantabile | 1 | 107 |
| Rhododendron cantabile | 2 | 53, 375 |
| Rhododendron cantabile | 8 | 130 |
| Rhododendron capitatum | 58 | 238 |
| Rhododendron 'Carmen' | 35 | 364 |
| Rhododendron 'Carmen' | 57 | 65 |
| Rhododendron 'Carmen' | 59 | 213 |
| Rhododendron 'Carmen' | 63 | 351C |
| Rhododendron carringtoniae | 47 | 58 |
| Rhododendron catawbiense | 45 | 263 |
| Rhododendron catawbiense | 74 | 46C, 47 |
| Rhododendron caucasicum | 4 | 107 |
| Rhododendron caucasicum | 10 | 256 |
| Rhododendron caucasicum | 30 | 127 |
| Rhododendron caucasicum | 45 | 235 |
| Rhododendron caucasicum | 46 | 129 |
| Rhododendron caucasicum | 47 | 154 |
| Rhododendron caucasicum | 49 | 166 |
| Rhododendron caucasicum | 52 | 36 |
| Rhododendron caucasicum | 63 | 412C |
| Rhododendron caucasicum | 69 | 232C |
| Rhododendron caucasicum | 75 | 189C |
| Rhododendron caucasicum | 79 | 150C |
| Rhododendron caucasicum 'Pictum' | 64 | 25C |
| Rhododendron cephalanthum | 29 | R 152 |
| Rhododendron cephalanthum | 51 | 148 |
| Rhododendron cephalanthum | 66 | 50 |
| Rhododendron cephalanthum | 70 | 71, 350 |
| Rhododendron cephalanthum | 72 | 303 |
| Rhododendron cephalanthum | 75 | 354 |
| Rhododendron cephalanthum | 76 | 76, 153 |
| Rhododendron cephalanthum | 77 | 166 |
| Rhododendron cephalanthum 'Winifred Murray' | 81 | 198 |
| Rhododendron cephalanthum subsp. cephalanthum | 79 | 65 |
| Rhododendron cephalanthum var. crebeflorum | 46 | 282 |
| Rhododendron cephalanthum var. crebeflorum | 64 | 67 |
| Rhododendron cerasinum | 75 | 353C, 354, 357 |
| Rhododendron chaetomallum var. chamaephytum | 72 | 304 |
| Rhododendron chamaethompsonii var chamaethompsonii | 79 | 65C |
| Rhododendron chamaezelum | 8 | 133 |
| Rhododendron chameunum | 8 | 130 |
| Rhododendron chameunum | 30 | 36 |
| Rhododendron charidotes | 8 | 130 |
| Rhododendron charitopes | 1 | 108 |
| Rhododendron charitopes | 8 | 129 |
| Rhododendron charitopes | 19 | 147 |
| Rhododendron charitopes | 73 | 94 |
| Rhododendron charitopes subsp. tsangpoense | 75 | 354, 356C |
| Rhododendron 'Chikor' | 45 | 171 |
| Rhododendron 'Chikor' | 60 | 252, 253C |
| Rhododendron 'Chikor' | 61 | 462 |
| Rhododendron chorlops | 29 | 35 |
| Rhododendron christi | 47 | 57 |
| Rhododendron christianae | 47 | 57 |
| Rhododendron chrysanthum | 8 | 132P, 133 |
| Rhododendron chrysanthum | 17 | 76 |
| Rhododendron chrysanthum | 46 | 211 |
| Rhododendron chryseum | 1 | 107 |
| Rhododendron chryseum | 2 | 53 |
| Rhododendron chryseum | 8 | 133 |
| Rhododendron chryseum | 27 | 254 |
| Rhododendron chryseum | 64 | 169 |
| Rhododendron ciliatum | 1 | 107 |
| Rhododendron ciliatum | 18 | 59 |
| Rhododendron ciliatum | 19 | 148 |
| Rhododendron ciliatum | 41 | 262 |
| Rhododendron ciliatum dwarf form | 23 | 184 |
| Rhododendron 'Cilpinense' | 1 | 107 |
| Rhododendron 'Cilpinense' | 2 | 298P |
| Rhododendron 'Cilpinense' | 19 | 150 |
| Rhododendron 'Cilpinense' | 47 | 234, 236P |
| Rhododendron cinnabarinum | 18 | 59 |
| Rhododendron cinnabarinum | 52 | 239 |
| Rhododendron cinnabarinum | 62 | 186 |
| Rhododendron cinnabarinum | 63 | 153 |
| Rhododendron cinnabarinum | 72 | 276 |
| Rhododendron cinnabarinum purpurellum | 29 | 35 |
| Rhododendron cinnabarinum subsp. xanthocodon | 75 | 356C, 357, 359, 362 |
| Rhododendron circinnatum | 75 | 362 |
| Rhododendron citriniflorum | 76 | 489C |
| Rhododendron clementinae | 64 | 250 |
| Rhododendron commonae | 47 | 59 |
| Rhododendron commonae | 49 | 75 |
| Rhododendron commonae | 58 | 245 |
| Rhododendron complexum | 2 | 139 |
| Rhododendron complexum | 64 | 250 |
| Rhododendron concinnum | 70 | 306 |
| Rhododendron coriaceum | 76 | 485 |
| Rhododendron coryanum | 75 | 359 |
| Rhododendron cowanianum | 29 | 35, R 105 |
| Rhododendron cowanianum | 41 | 67 |
| Rhododendron cowanianum | 53 | 317 |
| Rhododendron crebreflorum | 8 | 129 |
| Rhododendron crebreflorum | 19 | 149 |
| Rhododendron crebreflorum | 70 | 262 |
| Rhododendron cruttwellii | 47 | 57, 198, 199P |
| Rhododendron cuneatum | 51 | 38 |
| Rhododendron cuneatum | 56 | 115 |
| Rhododendron 'Curlew' | 46 | 119, 282 |
| Rhododendron 'Curlew' | 54 | 67 |
| Rhododendron 'Curlew' | 59 | 37 |
| Rhododendron 'Curlew' | 71 | 216 |
| Rhododendron cyanocarpum | 51 | 142 |
| Rhododendron 'Dainty' | 12 | 70P, 81F.C.C. |
| Rhododendron dalhousiae | 49 | 217 |
| Rhododendron dalhousiae | 55 | 213 |
| Rhododendron dasycladon | 56 | 291 |
| Rhododendron dauricum | 16 | 320 |
| Rhododendron dauricum | 43 | 271 |
| Rhododendron dauricum | 55 | 316 |
| Rhododendron dauricum | 57 | 222 |
| Rhododendron dauricum | 76 | 27C |
| Rhododendron dauricum | 83 | 388, 390C |
| Rhododendron decorum | 51 | 142 |
| Rhododendron decorum | 56 | 21, 115, 122, 291, 298 |
| Rhododendron decorum | 64 | 137, 251 |
| Rhododendron decorum | 73 | 51 |
| Rhododendron decorum | 76 | 483 |
| Rhododendron delavayi | 56 | 21 |
| Rhododendron deleiense | 15 | 129 |
| Rhododendron dendrocharis | 65 | 416C, 417-418P.C.* |
| Rhododendron dendrocharis | 66 | 35 |
| Rhododendron dendrocharis | 70 | 306, 351 |
| Rhododendron dendrocharis | 72 | 83 |
| Rhododendron dendrocharis | 76 | 92C |
| Rhododendron dendrocharis 'Glendoick Gem' | 77 | 480C, A.M. |
| Rhododendron dicroanthum | 1 | 166, 167P |
| Rhododendron dicroanthum | 27 | 250P, 255 |
| Rhododendron didymum | 26 | 325 |
| Rhododendron dignabile | 75 | 354C |
| Rhododendron dignabile 'Elizabeth Red Foliage' | 78 | 144 |
| Rhododendron dwarf | 52 | 74-85* |
| Rhododendron 'Early Gem' | 27 | 257 |
| Rhododendron edgarianum | 19 | 147 |
| Rhododendron edgarianum | 28 | 30 |
| Rhododendron edgeworthii | 51 | 143 |
| Rhododendron edgeworthii | 56 | 290 |
| Rhododendron 'Egret' | 59 | 339C |
| Rhododendron elaeagnoides | 1 | 108 |
| Rhododendron 'Elfin Gold' | 59 | 280 |
| Rhododendron 'Elfin Gold' | 71 | 216 |
| Rhododendron 'Elisabeth Lockhart' | 71 | 127 |
| Rhododendron 'Elizabeth' | 22 | 120 |
| Rhododendron 'Elizabeth' | 26 | 261 |
| Rhododendron 'Elizabeth' | 63 | 153 |
| Rhododendron exasperatum | 75 | 355 |
| Rhododendron faberi subsp prattii | 78 | 349C |
| Rhododendron faberi subsp prattii | 79 | 57C |
| Rhododendron falconeri | 72 | 265, 313 |
| Rhododendron fallacinum | 74 | 143C |
| Rhododendron fastigiatum | 2 | 139, 319P |
| Rhododendron fastigiatum | 8 | 130 |
| Rhododendron fastigiatum | 23 | 252 |
| Rhododendron fastigiatum | 27 | 254 |
| Rhododendron fastigiatum | 51 | 145 |
| Rhododendron fastigiatum | 56 | 236 |
| Rhododendron fastigiatum | 76 | 153 |
| Rhododendron faucium | 75 | 354 |
| Rhododendron ferrugineum | 1 | 108 |
| Rhododendron ferrugineum | 3 | 185 |
| Rhododendron ferrugineum | 4 | 98 |
| Rhododendron ferrugineum | 10 | 60 |
| Rhododendron ferrugineum | 16 | 294P, 308 |
| Rhododendron ferrugineum | 17 | 21 |
| Rhododendron ferrugineum | 18 | 22, 25, 59, 166 |
| Rhododendron ferrugineum | 19 | 91, 149, 353 |
| Rhododendron ferrugineum | 20 | 16, 78, 160 |
| Rhododendron ferrugineum | 21 | 134, 180, 314 |
| Rhododendron ferrugineum | 23 | 245, 324 |
| Rhododendron ferrugineum | 24 | 51, 64, 70 |
| Rhododendron ferrugineum | 25 | 274, 315, 343 |
| Rhododendron ferrugineum | 26 | 94, 131, 191 |
| Rhododendron ferrugineum | 27 | 165, 253, 358 |
| Rhododendron ferrugineum | 28 | 120, 187, 328 |
| Rhododendron ferrugineum | 30 | 49, 237 |
| Rhododendron ferrugineum | 33 | 72, 137 |
| Rhododendron ferrugineum | 35 | 122 |
| Rhododendron ferrugineum | 36 | 176, 316 |
| Rhododendron ferrugineum | 37 | 93, 220 |
| Rhododendron ferrugineum | 38 | 138P |
| Rhododendron ferrugineum | 41 | 232 |
| Rhododendron ferrugineum | 44 | 82 |
| Rhododendron ferrugineum | 45 | 141 |
| Rhododendron ferrugineum | 46 | 68, 77, 158, 216 |
| Rhododendron ferrugineum | 47 | 60 |
| Rhododendron ferrugineum | 48 | 45 |
| Rhododendron ferrugineum | 51 | 240, 267 |
| Rhododendron ferrugineum | 52 | 22, 79, 420 |
| Rhododendron ferrugineum | 53 | 138, 208, 334 |
| Rhododendron ferrugineum | 56 | 11 |
| Rhododendron ferrugineum | 58 | 143 |
| Rhododendron ferrugineum | 59 | 361C |
| Rhododendron ferrugineum | 69 | 195 |
| Rhododendron ferrugineum | 74 | 14 |
| Rhododendron ferrugineum | 76 | 160 |
| Rhododendron ferrugineum | 79 | 541 |
| Rhododendron ferrugineum | 82 | 353 |
| Rhododendron ferrugineum album | 17 | 21 |
| Rhododendron ferrugineum album | 23 | 245 |
| Rhododendron ferrugineum album | 47 | 62, 63P |
| Rhododendron ferrugineum x hirsutum | 82 | 421 |
| Rhododendron ferrugineum latifolium | 23 | 245 |
| Rhododendron fictolacteum | 56 | 291 |
| Rhododendron flavidum | 12 | 152P, 154 |
| Rhododendron flavidum | 19 | 147 |
| Rhododendron flavidum | 76 | 463 |
| Rhododendron flavum | 31 | 243 |
| Rhododendron flinckii | 72 | 302 |
| Rhododendron forrestii | 8 | 130 |
| Rhododendron forrestii | 12 | 130 |
| Rhododendron forrestii | 25 | 95 |
| Rhododendron forrestii | 40 | 124 |
| Rhododendron forrestii | 61 | 229 |
| Rhododendron forrestii | 72 | 304 |
| Rhododendron forrestii | 75 | 354C, 360, 365 |
| Rhododendron forrestii | 76 | 486C |
| Rhododendron forrestii | 77 | 167 |
| Rhododendron forrestii 'Little Ben' | 40 | 8 |
| Rhododendron forrestii var. repens | 19 | 148 |
| Rhododendron forrestii var. repens | 21 | 117, 280 |
| Rhododendron forrestii var. repens | 25 | 125 |
| Rhododendron forrestii var. repens | 27 | 255 |
| Rhododendron forrestii var. repens | 28 | 33, 78, 120 |
| Rhododendron forrestii var. repens | 33 | 200, 331 |
| Rhododendron forrestii var. repens | 37 | 274, 275C |
| Rhododendron forrestii var. repens | 47 | 366 |
| Rhododendron forrestii var. repens | 52 | 52, 82, 84 |
| Rhododendron forrestii var. repens | 53 | 208 |
| Rhododendron forrestii var. repens | 56 | 136 |
| Rhododendron forrestii var. repens | 59 | 213 |
| Rhododendron forrestii var. repens | 61 | 229 |
| Rhododendron forrestii var. repens | 72 | 327 |
| Rhododendron forrestii var. repens | 73 | 260 |
| Rhododendron forrestii Repens Group | 82 | 412, 413C |
| Rhododendron forrestii var. tumescens | 61 | 229 |
| Rhododendron fragariflorum | 15 | 129 |
| Rhododendron fragariflorum | 72 | 303 |
| Rhododendron fragariflorum | 75 | 354, 361, 362, 363C |
| Rhododendron fulvum | 56 | 295 |
| Rhododendron fulvum | 71 | 215 |
| Rhododendron fulvum subsp. fulvoides | 75 | 357 |
| Rhododendron fulvum 'Gartendirector Glocker' | 78 | 517C, 518 |
| Rhododendron gardenia | 47 | 58 |
| Rhododendron gaultheriifolium | 58 | 245 |
| Rhododendron 'Genoveva' | 59 | 221 |
| Rhododendron 'Gigha' | 71 | 216 |
| Rhododendron 'Ginny Gee' | 60 | 294 |
| Rhododendron 'Ginny Gee' | 67 | 52 |
| Rhododendron glandulosum | 4 | 69 |
| Rhododendron glaucophyllum | 41 | 262 |
| Rhododendron glaucophyllum | 59 | 268C |
| Rhododendron glaucophyllum 'Len Beer' | 49 | 300 |
| Rhododendron glaucophyllum var. luteiflorum | 29 | 35 |
| Rhododendron glaucum | 8 | 129 |
| Rhododendron glaucum | 17 | 215 |
| Rhododendron glaucum | 19 | 147 |
| Rhododendron glischrum subsp. rude | 75 | 357 |
| Rhododendron 'Gloriseum' | 29 | R 152 |
| Rhododendron goreri | 75 | 359 |
| Rhododendron gracilentum | 47 | 58 |
| Rhododendron grande | 18 | 59 |
| Rhododendron griersonianum | 1 | 109 |
| Rhododendron griffithianum | 52 | 212 |
| Rhododendron groenlandicum | 77 | 121 |
| Rhododendron haematodes | 1 | 109 |
| Rhododendron haematodes | 27 | 255 |
| Rhododendron haematodes | 51 | 144 |
| Rhododendron hanceanum | 19 | 148 |
| Rhododendron hanceanum | 67 | 49 |
| Rhododendron hanceanum 'Nanum' | 64 | 28C |
| Rhododendron hanceanum pygmaeum | 8 | 133 |
| Rhododendron hanceanum pygmaeum | 15 | 128 |
| Rhododendron hanceanum pygmaeum | 19 | 148 |
| Rhododendron heatheriae | 75 | 357 |
| Rhododendron heliolepis | 51 | 144 |
| Rhododendron helwigii | 47 | 59 |
| Rhododendron hemitrichotum | 16 | 221 |
| Rhododendron hippaephaeoides | 81 | 254 |
| Rhododendron hippophaeoides | 1 | 107 |
| Rhododendron hippophaeoides | 8 | 127P, 130 |
| Rhododendron hippophaeoides | 19 | 147 |
| Rhododendron hippophaeoides | 27 | 254 |
| Rhododendron hippophaeoides | 28 | 30 |
| Rhododendron hippophaeoides | 56 | 122 |
| Rhododendron hippophaeoides | 64 | 251 |
| Rhododendron hippophaeoides 'Haba Shan' | 71 | 127, 336 |
| Rhododendron hippophaeoides 'Haba Shan' | 72 | 309 |
| Rhododendron hippophaeoides 'Haba Shan' | 74 | 423C |
| Rhododendron hirsutum | 1 | 108 |
| Rhododendron hirsutum | 8 | 130 |
| Rhododendron hirsutum | 16 | 294P, 308 |
| Rhododendron hirsutum | 19 | 149, 269, 354 |
| Rhododendron hirsutum | 21 | 50, 99, 315 |
| Rhododendron hirsutum | 23 | 245 |
| Rhododendron hirsutum | 24 | 59, 123 |
| Rhododendron hirsutum | 25 | 340 |
| Rhododendron hirsutum | 26 | 94, 192 |
| Rhododendron hirsutum | 27 | 251 |
| Rhododendron hirsutum | 28 | 187, 315, 328 |
| Rhododendron hirsutum | 31 | 239 |
| Rhododendron hirsutum | 32 | 130 |
| Rhododendron hirsutum | 33 | 137 |
| Rhododendron hirsutum | 34 | 182 |
| Rhododendron hirsutum | 37 | 79 |
| Rhododendron hirsutum | 39 | 109 |
| Rhododendron hirsutum | 45 | 141 |
| Rhododendron hirsutum | 46 | 73 |
| Rhododendron hirsutum | 53 | 112, 208 |
| Rhododendron hirsutum | 54 | 204 |
| Rhododendron hirsutum | 72 | 350 |
| Rhododendron hirsutum 'Flore Pleno' | 83 | 387C, 388, 389C |
| Rhododendron hirtipes | 75 | 354, 357C, 359 |
| Rhododendron hirtipes | 78 | 143C, 144 |
| Rhododendron hodgsonii | 18 | 59 |
| Rhododendron hodgsonii | 53 | 316 |
| Rhododendron hodgsonii | 72 | 265 |
| Rhododendron hodgsonii | 74 | 198 |
| Rhododendron hormophorum | 21 | 258 |
| Rhododendron 'Humming Bird' | 27 | 255 |
| Rhododendron hyacinthosum | 47 | 58 |
| Rhododendron hybrids | 23 | 27 |
| Rhododendron hypenanthum | 23 | 231 |
| Rhododendron hypenanthum | 50 | 222 |
| Rhododendron hypenanthum | 52 | 273 |
| Rhododendron hypolepidotum | 1 | 177P |
| Rhododendron idoneum | 8 | 130 |
| Rhododendron impeditum | 1 | 107 |
| Rhododendron impeditum | 2 | 54 |
| Rhododendron impeditum | 8 | 130 |
| Rhododendron impeditum | 12 | 81A.M. |
| Rhododendron impeditum | 15 | 129, 131P |
| Rhododendron impeditum | 27 | 249P, 254 |
| Rhododendron impeditum | 28 | 29, 30 |
| Rhododendron impeditum | 34 | 334 |
| Rhododendron impeditum | 71 | 216 |
| Rhododendron impeditum | 72 | 309 |
| Rhododendron impeditum 'Pygmaeum' | 83 | 388 |
| Rhododendron impeditum White Form | 78 | 99 |
| Rhododendron imperator | 8 | 130 |
| Rhododendron imperator | 19 | 148 |
| Rhododendron imperator | 21 | 116 |
| Rhododendron imperator | 23 | 252 |
| Rhododendron imperator | 53 | 208 |
| Rhododendron imperator | 75 | 118, 356C |
| Rhododendron indicum | 18 | 160 |
| Rhododendron indicum | 19 | 151 |
| Rhododendron indicum | 26 | 88 |
| Rhododendron indicum | 27 | 257 |
| Rhododendron intricatum | 1 | 106P, 107 |
| Rhododendron intricatum | 2 | 54 |
| Rhododendron intricatum | 8 | 130 |
| Rhododendron intricatum | 19 | 147 |
| Rhododendron intricatum | 28 | 30 |
| Rhododendron intricatum | 76 | 460 |
| Rhododendron 'Intrifast' | 27 | 256 |
| Rhododendron iowii | 74 | 143C |
| Rhododendron japonicum | 57 | 216 |
| Rhododendron kaempferi | 55 | 316 |
| Rhododendron kaempferi | 57 | 218 |
| Rhododendron kamtschaticum | 36 | 347, 354P |
| Rhododendron kasoense | 72 | 303C |
| Rhododendron keiskei | 8 | 133 |
| Rhododendron keiskei | 19 | 148 |
| Rhododendron keiskei | 28 | 79 |
| Rhododendron keiskei | 40 | 123 |
| Rhododendron keiskei | 61 | 228, 231 |
| Rhododendron keiskei var. ozawae 'Yaku Fairy' | 81 | 200C, 201 |
| Rhododendron keiskei var. ozawae 'Yaku Fairy' | 80 | 461 |
| Rhododendron keiskei 'Yaku Fairy' | 40 | 122P, 123 |
| Rhododendron keiskei 'Yaku Fairy' | 45 | 289, 294P |
| Rhododendron keiskei 'Yaku Fairy' | 49 | 300, 301P |
| Rhododendron keiskei 'Yaku Fairy' | 52 | 16, 74, 76, 78, 84 |
| Rhododendron keiskei 'Yaku Fairy' | 57 | 65 |
| Rhododendron keiskei 'Yaku Fairy' | 59 | 280 |
| Rhododendron keiskei 'Yaku Fairy' | 60 | 294 |
| Rhododendron keiskei 'Yaku Fairy' | 61 | 228, 231 |
| Rhododendron keiskei 'Yaku Fairy' | 65 | 59 |
| Rhododendron keiskei 'Yaku Fairy' | 66 | 53 |
| Rhododendron keleticum | 1 | 107 |
| Rhododendron keleticum | 2 | 53, 139, 375 |
| Rhododendron keleticum | 8 | 130 |
| Rhododendron keleticum | 19 | 147 |
| Rhododendron keleticum | 28 | 29 |
| Rhododendron keleticum | 30 | 36 |
| Rhododendron keleticum | 40 | 125 |
| Rhododendron keleticum | 47 | 153 |
| Rhododendron keleticum | 61 | 230 |
| Rhododendron kesangiae | 72 | 302 |
| Rhododendron keysii | 72 | 272 |
| Rhododendron keysii | 75 | 357 |
| Rhododendron kingdonii | 70 | 262 |
| Rhododendron kiusianum | 63 | 59 |
| Rhododendron kiusianum | 71 | 216, 221C |
| Rhododendron kiusianum | 75 | 118 |
| Rhododendron kiusianum | 80 | 83 |
| Rhododendron kiusianum | 81 | 96 |
| Rhododendron kiusianum 'Mayogi' | 54 | 245 |
| Rhododendron kongboense | 8 | 130 |
| Rhododendron kongboense | 70 | 351 |
| Rhododendron kongboense | 75 | 352, 354, 360 |
| Rhododendron konori | 47 | 58 |
| Rhododendron kotschyi | 1 | 108 |
| Rhododendron kotschyi | 38 | 254 |
| Rhododendron kotschyi | 48 | 126 |
| Rhododendron kyawi | 1 | 178P |
| Rhododendron lacteum | 51 | 142 |
| Rhododendron laetum | 47 | 57 |
| Rhododendron lanatoides | 75 | 358C, 359 |
| Rhododendron lanatum | 52 | 213, 237, 277 |
| Rhododendron lapponicum | 5 | 136 |
| Rhododendron lapponicum | 7 | 345, 369P |
| Rhododendron lapponicum | 27 | 11 |
| Rhododendron lapponicum | 34 | 311 |
| Rhododendron lapponicum | 39 | 8, 39 |
| Rhododendron lapponicum | 47 | 197 |
| Rhododendron lapponicum | 54 | 65 |
| Rhododendron lapponicum | 55 | 89 |
| Rhododendron lapponicum | 56 | 61, 74, 255 |
| Rhododendron lapponicum | 59 | 66 |
| Rhododendron lapponicum | 60 | 95 |
| Rhododendron lapponicum | 65 | 95, 111 |
| Rhododendron lapponicum | 79 | 204 |
| Rhododendron laudandum | 75 | 355, 358 |
| Rhododendron laudanum var. temoense | 75 | 355C, 358, 361, 362 |
| Rhododendron ledoides | 19 | 149 |
| Rhododendron lepidostylum | 19 | 146 |
| Rhododendron lepidostylum | 27 | 255 |
| Rhododendron lepidostylum | 67 | 344 |
| Rhododendron lepidostylum | 71 | 127 |
| Rhododendron lepidostylum | 72 | 292C, 313 |
| Rhododendron lepidostylum | 78 | 155, 156C |
| Rhododendron lepidotum | 22 | 219, 318 |
| Rhododendron lepidotum | 23 | 231 |
| Rhododendron lepidotum | 27 | 254 |
| Rhododendron lepidotum | 42 | 153, 210 |
| Rhododendron lepidotum | 47 | 233 |
| Rhododendron lepidotum | 50 | 233 |
| Rhododendron lepidotum | 52 | 76, 81, 192, 217, 240, 273, 274-5 |
| Rhododendron lepidotum | 57 | 259 |
| Rhododendron lepidotum | 58 | 129 |
| Rhododendron lepidotum | 62 | 103, 186 |
| Rhododendron lepidotum | 72 | 46, 235, 243, 254, 272, 281, 283, 286, 313 |
| Rhododendron lepidotum | 74 | 58C, 60, 197 |
| Rhododendron lepidotum | 75 | 319, 338, 358, 360, 362 |
| Rhododendron lepidotum | 79 | 63 |
| Rhododendron lepidotum B.L.M. 620 | 50 | 34 |
| Rhododendron lepidotum var. elaeagnoides | 52 | 76, 81, 274 |
| Rhododendron lepidotum McB 1110 | 82 | 421 |
| Rhododendron leptanthum | 47 | 58 |
| Rhododendron leptopeplum | 77 | 165 |
| Rhododendron leptothrium | 56 | 290, 295 |
| Rhododendron leucaspis | 1 | 108 |
| Rhododendron leucaspis | 2 | 70P, 84 |
| Rhododendron leucaspis | 8 | 129 |
| Rhododendron leucaspis | 12 | 81 |
| Rhododendron leucaspis | 17 | 307 |
| Rhododendron leucaspis | 19 | 147 |
| Rhododendron leucaspis | 21 | 58 |
| Rhododendron leucaspis | 22 | 236 |
| Rhododendron leucaspis | 23 | 185P |
| Rhododendron leucaspis | 25 | 122 |
| Rhododendron leucaspis | 26 | 5 |
| Rhododendron leucaspis | 27 | 256 |
| Rhododendron leucaspis | 31 | 76 |
| Rhododendron leucaspis | 34 | 246 |
| Rhododendron leucaspis | 38 | 357 |
| Rhododendron leucaspis | 72 | 326C, 327 |
| Rhododendron leucaspis | 78 | 90 |
| Rhododendron leucogigas | 47 | 58 |
| Rhododendron linearifolium | 3 | 208 |
| Rhododendron linearifolium | 4 | 133P |
| Rhododendron 'Little Bert' | 28 | 78 |
| Rhododendron 'Little Bert' | 34 | 334 |
| Rhododendron 'Little Bert' | 40 | 7 |
| Rhododendron 'Little Joe' | 28 | 78 |
| Rhododendron loderi 'King George' | 59 | 338 |
| Rhododendron lowndesii | 22 | 225 |
| Rhododendron lowndesii | 23 | 232 |
| Rhododendron lowndesii | 24 | 359 |
| Rhododendron lowndesii | 29 | 35, R 101, R 105 |
| Rhododendron lowndesii | 40 | 284, 286P |
| Rhododendron lowndesii | 42 | 155, 286, 317 |
| Rhododendron lowndesii | 44 | 92 |
| Rhododendron lowndesii | 47 | 233 |
| Rhododendron lowndesii | 57 | 259, 262C |
| Rhododendron lowndesii | 61 | 35 |
| Rhododendron lowndesii | 64 | 82 |
| Rhododendron lowndesii | 71 | 69 |
| Rhododendron lowndesii | 72 | 47 |
| Rhododendron lowndesii | 76 | 153 |
| Rhododendron lowndesii | 81 | 96, 200 |
| Rhododendron luciferum | 75 | 362, 363C |
| Rhododendron ludlowii | 29 | 73 |
| Rhododendron ludlowii | 40 | 284 |
| Rhododendron ludlowii | 47 | 232*, 235P |
| Rhododendron ludlowii | 60 | 294 |
| Rhododendron ludlowii | 61 | 462 |
| Rhododendron ludlowii | 62 | 216 |
| Rhododendron ludlowii | 72 | 303 |
| Rhododendron ludlowii | 75 | 363 |
| Rhododendron ludlowii | 76 | 156 |
| Rhododendron ludlowii | 81 | 200 |
| Rhododendron ludlowii hybrid | 80 | 337C |
| Rhododendron luteiflorum | 59 | 280 |
| Rhododendron lutescens | 70 | 306 |
| Rhododendron luteum | 25 | 105 |
| Rhododendron luteum | 29 | 159, R 61 |
| Rhododendron luteum | 46 | 131 |
| Rhododendron luteum | 48 | 283 |
| Rhododendron luteum | 49 | 166 |
| Rhododendron luteum | 52 | 36 |
| Rhododendron luteum | 75 | 190C |
| Rhododendron luteum | 78 | 144 |
| Rhododendron lysolepis | 19 | 147 |
| Rhododendron macgregoriae | 47 | 56 |
| Rhododendron macgregoriae | 58 | 245 |
| Rhododendron macrophyllum | 45 | 209 |
| Rhododendron maddenii | 59 | 268 |
| Rhododendron mainlingense | 75 | 308 |
| Rhododendron makinoi | 63 | 153 |
| Rhododendron maximum | 45 | 263 |
| Rhododendron megeratum | 1 | 108 |
| Rhododendron megeratum | 8 | 133 |
| Rhododendron megeratum | 27 | 255 |
| Rhododendron megeratum | 67 | 393 |
| Rhododendron megeratum | 71 | 216 |
| Rhododendron megeratum | 75 | 356 |
| Rhododendron mekongense | 56 | 291, 298 |
| Rhododendron mekongense | 75 | 354, 357, 360C |
| Rhododendron 'Merganser' | 67 | 407 |
| Rhododendron metternichii var. pentamerum | 49 | 189 |
| Rhododendron metternichii var. pentamerum | 57 | 216 |
| Rhododendron microleucum | 15 | 129 |
| Rhododendron microleucum | 19 | 147 |
| Rhododendron microleucum | 23 | 85 |
| Rhododendron microleucum | 35 | 353 |
| Rhododendron microleucum | 51 | 38 |
| Rhododendron micromeres | 1 | 108 |
| Rhododendron micromeres | 52 | 282 |
| Rhododendron micromeres | 53 | 316 |
| Rhododendron miniatum | 75 | 362 |
| Rhododendron 'Moerheim' | 59 | 221 |
| Rhododendron 'Moerheim' | 71 | 216 |
| Rhododendron 'Moerheim's Pink' | 59 | 221 |
| Rhododendron mollicomum | 1 | 107 |
| Rhododendron mollyanum | 29 | 35 |
| Rhododendron monanthum | 72 | 303 |
| Rhododendron monanthum | 75 | 357 |
| Rhododendron moupinense | 1 | 107 |
| Rhododendron moupinense | 6 | 110C |
| Rhododendron moupinense | 15 | 128 |
| Rhododendron moupinense | 21 | 259 |
| Rhododendron moupinense | 23 | 252 |
| Rhododendron moupinense hybrids | 47 | 234 |
| Rhododendron mucronulatum | 17 | 214 |
| Rhododendron mucronulatum | 19 | 151 |
| Rhododendron mucronulatum | 21 | 147 |
| Rhododendron mucronulatum | 27 | 254 |
| Rhododendron mucronulatum | 28 | 73 |
| Rhododendron mucronulatum var. taquetii (syn. var. chejuense and 'Cheju Dwarf) | 80 | 252 |
| Rhododendron mucronulatum var. chejuense | 66 | 43C |
| Rhododendron muliense | 1 | 107 |
| Rhododendron muliense | 2 | 53 |
| Rhododendron muliense | 8 | 133 |
| Rhododendron myrtifolium | 61 | 40 |
| Rhododendron myrtilloides | 1 | 109P, 183 |
| Rhododendron myrtilloides | 2 | 375P, 376 |
| Rhododendron myrtilloides | 8 | 130 |
| Rhododendron myrtilloides | 19 | 148 |
| Rhododendron myrtilloides | 27 | 253 |
| Rhododendron nakaharae | 78 | 113 |
| Rhododendron neriiflorum | 1 | 109 |
| Rhododendron neriiflorum | 2 | 52 |
| Rhododendron neriiflorum | 17 | 215 |
| Rhododendron neriiflorum | 27 | 255 |
| Rhododendron x nikomontanum | 57 | 218 |
| Rhododendron nitens | 8 | 130 |
| Rhododendron nitens | 19 | 147 |
| Rhododendron nitens | 23 | 252 |
| Rhododendron nitens | 30 | 36 |
| Rhododendron nitidulum | 76 | 460 |
| Rhododendron nivale | 4 | 69 |
| Rhododendron nivale | 8 | 130 |
| Rhododendron nivale | 15 | 129 |
| Rhododendron nivale | 41 | 259 |
| Rhododendron nivale | 42 | 158, 210 |
| Rhododendron nivale | 52 | 275 |
| Rhododendron nivale | 67 | 183 |
| Rhododendron nivale | 72 | 292, 303 |
| Rhododendron nivale | 74 | 202 |
| Rhododendron nivale | 75 | 306, 308, 319, 338, 352C, 358, 361, 362 |
| Rhododendron nivale | 76 | 149 |
| Rhododendron nivale subsp. boreale | 64 | 250 |
| Rhododendron nivale subsp. boreale | 70 | 305 |
| Rhododendron nivale subsp. nivale | 75 | 359, 362C |
| Rhododendron nivale ssp. boreale | 76 | 458 |
| Rhododendron nudiflorum | 74 | 46C |
| Rhododendron nudiflorum forma. glanduligerum | 74 | 47 |
| Rhododendron nuttallii | 75 | 359 |
| Rhododendron 'Oban' | 71 | 216 |
| Rhododendron obtusum var. amoenum | 21 | 60 |
| Rhododendron obtusum var. amoenum | 26 | 87 |
| Rhododendron obtusum var. amoenum | 28 | 81 |
| Rhododendron obtusum var. amoenum | 59 | 36C |
| Rhododendron obtusum kaempferi | 26 | 87 |
| Rhododendron obtusum leucanthum | 26 | 87 |
| Rhododendron obtusum macrostemon | 28 | 33 |
| Rhododendron obtusum vars. | 19 | 151 |
| Rhododendron occidentale | 22 | 161 |
| Rhododendron occidentale | 65 | 188 |
| Rhododendron occidentale | 78 | 407 |
| Rhododendron oleifolium | 1 | 107, 108P |
| Rhododendron orbiculare | 1 | 109 |
| Rhododendron orbiculare | 70 | 306 |
| Rhododendron orbiculare | 76 | 463, 464C |
| Rhododendron orbiculare | 78 | 350C |
| Rhododendron orbiculare | 79 | 57C |
| Rhododendron oreodoxa | 60 | 67 |
| Rhododendron oreotrephes | 17 | 215 |
| Rhododendron oreotrephes | 34 | 266 |
| Rhododendron oreotrephes | 56 | 127, 291, 294C, 297 |
| Rhododendron oreotrephes | 64 | 251 |
| Rhododendron oreotrephes | 73 | 51 |
| Rhododendron oreotrephes | 75 | 359 |
| Rhododendron orthocladum | 56 | 236 |
| Rhododendron orthocladum | 64 | 67 |
| Rhododendron parmulatum | 75 | 355C |
| Rhododendron parvifolium | 43 | 277 |
| Rhododendron parvifolium | 57 | 222 |
| Rhododendron patulum | 15 | 128 |
| Rhododendron patulum | 19 | 148 |
| Rhododendron pemakoense | 8 | 129, 131P |
| Rhododendron pemakoense | 9 | 325 |
| Rhododendron pemakoense | 19 | 67, 147 |
| Rhododendron pemakoense | 21 | 58, 280 |
| Rhododendron pemakoense | 23 | 252 |
| Rhododendron pemakoense | 25 | 298P |
| Rhododendron pemakoense | 34 | 348 |
| Rhododendron pemakoense | 38 | 356 |
| Rhododendron pemakoense | 51 | 38 |
| Rhododendron pemakoense | 61 | 103 |
| Rhododendron pemakoense | 72 | 309 |
| Rhododendron pemakoense | 75 | 359 |
| Rhododendron petrocharis | 70 | 351 |
| Rhododendron petrocharis | 77 | 125, 126C |
| Rhododendron phaeochrysum | 56 | 296 |
| Rhododendron phaeochrysum | 64 | 250 |
| Rhododendron phaeochrysum | 75 | 350C, 354, 360, 361, 362C |
| Rhododendron phaeochrysum var. agglutinatum | 73 | 57 |
| Rhododendron phaeochrysum var. laudandum | 75 | 360 |
| Rhododendron 'Pipit' | 47 | 233*, 235P |
| Rhododendron 'Pipit' | 51 | 38 |
| Rhododendron ponticum | 29 | 159 |
| Rhododendron ponticum | 66 | 209 |
| Rhododendron ponticum | 70 | 203 |
| Rhododendron 'Praecox' | 2 | 52, 376 |
| Rhododendron 'Praecox' | 19 | 150 |
| Rhododendron 'Praecox' | 27 | 254 |
| Rhododendron 'Praecox' | 47 | 237 |
| Rhododendron 'Praecox' | 59 | 338 |
| Rhododendron 'Praecox' | 73 | 260 |
| Rhododendron prattii | 60 | 67 |
| Rhododendron primulaeflorum | 56 | 116, 121, 130 |
| Rhododendron primulaeflorum | 64 | 251C |
| Rhododendron primulaeflorum | 65 | 51 |
| Rhododendron primulaeflorum | 70 | 351 |
| Rhododendron primulaeflorum | 75 | 352, 359, 360C, 361 |
| Rhododendron primulaeflorum 'Doker La' | 71 | 59, 158 |
| Rhododendron principis | 75 | 352C, 359, 360, 361 |
| Rhododendron prostigiatum | 8 | 130 |
| Rhododendron prostratum | 8 | 130 |
| Rhododendron prostratum | 30 | 35 |
| Rhododendron prostratum | 35 | 357 |
| Rhododendron prostratum | 40 | 125 |
| Rhododendron prostratum | 61 | 229 |
| Rhododendron proteoides | 15 | 129, 132 |
| Rhododendron proteoides | 58 | 292 |
| Rhododendron przewalskii | 55 | 147 |
| Rhododendron pseudoyanthinum | 9 | 313P, 325 |
| Rhododendron pubescens | 2 | 54 |
| Rhododendron pubescens | 8 | 129 |
| Rhododendron pudorosum | 75 | 362 |
| Rhododendron pulchrum | 19 | 151 |
| Rhododendron pumilum | 8 | 129 |
| Rhododendron pumilum | 19 | 148 |
| Rhododendron pumilum | 28 | 79 |
| Rhododendron pumilum | 34 | 332 |
| Rhododendron pumilum | 41 | 261 |
| Rhododendron pumilum | 58 | 55, 61C |
| Rhododendron pumilum | 60 | 294 |
| Rhododendron pumilum | 65 | 53-54 |
| Rhododendron pumilum | 72 | 333 |
| Rhododendron pumilum | 74 | 103C, 104 |
| Rhododendron pumilum | 75 | 354 |
| Rhododendron pumilum | 76 | 490C |
| Rhododendron pumilum | 81 | 200 |
| Rhododendron racemosum | 1 | 107 |
| Rhododendron racemosum | 2 | 54, 376 |
| Rhododendron racemosum | 4 | 70, 72P |
| Rhododendron racemosum | 8 | 129 |
| Rhododendron racemosum | 19 | 149 |
| Rhododendron racemosum | 21 | 58 |
| Rhododendron racemosum | 26 | 73 |
| Rhododendron racemosum | 27 | 256 |
| Rhododendron racemosum | 35 | 70 |
| Rhododendron racemosum | 46 | 233C, 237 |
| Rhododendron racemosum | 51 | 145 |
| Rhododendron racemosum | 52 | 52, 78 |
| Rhododendron racemosum | 56 | 236, 291, 296, 298, 303 |
| Rhododendron racemosum | 64 | 250 |
| Rhododendron racemosum | 70 | 351 |
| Rhododendron racemosum | 76 | 79C |
| Rhododendron racemosum 'White Lace' | 83 | 132, 388 |
| Rhododendron racemosum dwarf white form | 83 | 131C, 132 |
| Rhododendron racemosum white form | 80 | 252 |
| Rhododendron radicans | 1 | 107, 167P |
| Rhododendron radicans | 2 | 53, 126, 376 |
| Rhododendron radicans | 8 | 125 |
| Rhododendron radicans | 19 | 147 |
| Rhododendron radicans | 28 | 29 |
| Rhododendron radicans | 30 | 35 |
| Rhododendron radicans | 33 | 203 |
| Rhododendron radicans | 40 | 125 |
| Rhododendron radicans | 61 | 229 |
| Rhododendron radicans | 62 | 33 |
| Rhododendron radicans | 71 | 216 |
| Rhododendron radicans Rock form | 61 | 230 |
| Rhododendron radinum | 8 | 129 |
| Rhododendron radinum | 15 | 129 |
| Rhododendron radinum | 19 | 149 |
| Rhododendron x radmosum | 19 | 150 |
| Rhododendron x radmosum | 29 | R 40 |
| Rhododendron ramsdenianum | 75 | 359 |
| Rhododendron rarum | 47 | 58 |
| Rhododendron rarum | 49 | 74 |
| Rhododendron 'Razorbill' | 50 | 34 |
| Rhododendron redowskianum | 4 | 69 |
| Rhododendron repens | 1 | 108 |
| Rhododendron repens | 2 | 11, 52, 139 |
| Rhododendron repens | 8 | 130 |
| Rhododendron repens | 12 | 130, 131P |
| Rhododendron repens chamaedoron | 28 | 79 |
| Rhododendron rhodoleucum | 47 | 58 |
| Rhododendron rivulare | 1 | 107 |
| Rhododendron 'Rosalind of Arden' | 19 | 150 |
| Rhododendron roseum | 74 | 47 |
| Rhododendron 'Rosy Bell' | 19 | 150 |
| Rhododendron roxieanum | 64 | 159, 250 |
| Rhododendron rubiginosum | 17 | 215 |
| Rhododendron rubiginosum | 56 | 115, 295 |
| Rhododendron rubineiflorum | 58 | 245 |
| Rhododendron rufescens | 76 | 460 |
| Rhododendron rupicola | 2 | 53 |
| Rhododendron rupicola | 19 | 147 |
| Rhododendron rupicola | 56 | 130 |
| Rhododendron rupicola | 64 | 136, 250 |
| Rhododendron rupicola | 70 | 267 |
| Rhododendron rupicola | 76 | 490 |
| Rhododendron rupicola var. chryseum | 64 | 251 |
| Rhododendron rupicola var. chryseum | 73 | 143C |
| Rhododendron russatum | 8 | 130 |
| Rhododendron russatum | 27 | 254 |
| Rhododendron russatum | 28 | 30 |
| Rhododendron russatum | 56 | 296 |
| Rhododendron russatum | 64 | 250 |
| Rhododendron russatum cantabile | 19 | 147 |
| Rhododendron saluenense | 1 | 107 |
| Rhododendron saluenense | 8 | 130 |
| Rhododendron saluenense | 19 | 147 |
| Rhododendron saluenense | 30 | 37 |
| Rhododendron saluenense | 76 | 490 |
| Rhododendron saluenense | 77 | 166C* |
| Rhododendron saluenense var. chameunum | 56 | 293C, 295, 297 |
| Rhododendron saluenense var. chameunum | 71 | 216 |
| Rhododendron saluenense var. chameunum | 75 | 111 |
| Rhododendron saluense var. prostratum | 76 | 489 |
| Rhododendron sanguineum | 1 | 108 |
| Rhododendron sanguineum | 75 | 360 |
| Rhododendron sanguineum var. cliophorum | 77 | 166C* |
| Rhododendron sanguineum var. haemaleum | 77 | 165C* |
| Rhododendron sargentianum | 2 | 53 |
| Rhododendron sargentianum | 4 | 73 |
| Rhododendron sargentianum | 19 | 149 |
| Rhododendron sargentianum | 23 | 252 |
| Rhododendron sargentianum | 27 | 253 |
| Rhododendron sargentianum | 35 | 365 |
| Rhododendron sargentianum | 55 | 148 |
| Rhododendron sargentianum | 65 | 58 |
| Rhododendron sargentianum | 70 | 306, 350, 351C |
| Rhododendron sargentianum | 72 | 309 |
| Rhododendron sargentianum | 73 | 94 |
| Rhododendron sargentianum | 75 | 432 |
| Rhododendron sargentianum | 76 | 153 |
| Rhododendron sargentianum x myrtifolium | 59 | 340C |
| Rhododendron 'Sarled' | 67 | 418, 443C, 444 |
| Rhododendron 'Sarled' | 73 | 200C, 201 |
| Rhododendron 'Sarled' | 76 | 153 |
| Rhododendron saxifragoides | 47 | 59, 198, 199P, 314 |
| Rhododendron saxifragoides | 58 | 245 |
| Rhododendron 'Saxon Glow' | 78 | 113 |
| Rhododendron scabrifolium | 28 | 33 |
| Rhododendron 'Scarlet Wonder' | 71 | 127 |
| Rhododendron schlippenbachii | 22 | 32 |
| Rhododendron schlippenbachii | 28 | 74 |
| Rhododendron scintillans | 8 | 130 |
| Rhododendron scintillans | 27 | 254 |
| Rhododendron scintillans | 53 | 208 |
| Rhododendron scopulorum | 75 | 359 |
| Rhododendron selense | 73 | 51, 54C |
| Rhododendron selense var. jucundum | 51 | 144 |
| Rhododendron setosum | 2 | 54 |
| Rhododendron setosum | 26 | 320 |
| Rhododendron setosum | 41 | 263 |
| Rhododendron setosum | 52 | 75, 197, 209C, 213, 264, 274, 278 |
| Rhododendron setosum | 53 | 316 |
| Rhododendron setosum | 72 | 256, 286, 331 |
| Rhododendron setosum | 74 | 198 |
| Rhododendron setosum | 75 | 321 |
| Rhododendron 'Shamrock' | 67 | 39 |
| Rhododendron 'Shamrock' | 77 | 104C, 105, 108 |
| Rhododendron simsii eriocarpum | 19 | 151 |
| Rhododendron sinogrande | 51 | 142 |
| Rhododendron sinogrande | 56 | 290 |
| Rhododendron sinogrande | 75 | 357 |
| Rhododendron sinolepidotum | 1 | 108 |
| Rhododendron sphaeranthum | 8 | 128P, 129 |
| Rhododendron spiciferum | 35 | 69 |
| Rhododendron spiciferum | 41 | 80* |
| Rhododendron spinulosum | 12 | 81A.M. |
| Rhododendron spp. | 35 | 81 |
| Rhododendron spp. | 36 | 196 |
| Rhododendron spp. | 47 | 234 |
| Rhododendron spp. Dauricum Series | 17 | 214 |
| Rhododendron spp. dwarf | 19 | 146 |
| Rhododendron spp. dwarf | 25 | 299 |
| Rhododendron spp. dwarf | 27 | 248 |
| Rhododendron spp. dwarf | 28 | 30, 202early flowering |
| Rhododendron spp. propagation | 17 | 73 |
| Rhododendron spp. Saluenense Series | 30 | 35 |
| Rhododendron spp. seed propagation | 30 | 315 |
| Rhododendron stewartianum | 76 | 485 |
| Rhododendron stewartianum | 77 | 166 |
| Rhododendron subsection Triflora | 80 | 300 |
| Rhododendron sulfureum | 51 | 143 |
| Rhododendron superbum | 47 | 58 |
| Rhododendron tapetiforme | 56 | 115, 130 |
| Rhododendron tapetiforme | 64 | 250 |
| Rhododendron tapetiforme | 70 | 351 |
| Rhododendron tatsiense | 76 | 463 |
| Rhododendron telmateium | 2 | 54 |
| Rhododendron telmateium | 19 | 147 |
| Rhododendron telmateium | 67 | 92C |
| Rhododendron temenium subsp. dealbatum | 77 | 166C* |
| Rhododendron 'Temple Belle' | 21 | 258 |
| Rhododendron tephropeplum | 1 | 108 |
| Rhododendron tephropeplum | 2 | 54, 85 |
| Rhododendron tephropeplum | 3 | 120, 143P |
| Rhododendron tephropeplum | 8 | 129 |
| Rhododendron tephropeplum | 19 | 148 |
| Rhododendron tephropeplum | 30 | 149 |
| Rhododendron tephropeplum | 47 | 153 |
| Rhododendron thomsonii | 18 | 59 |
| Rhododendron thomsonii subsp. lopsangianum | 75 | 362C |
| Rhododendron thymifolium | 60 | 67 |
| Rhododendron tomentosum subsp. subarcticum | 62 | 216 |
| Rhododendron 'Too Bee' | 60 | 294 |
| Rhododendron trichocladum | 51 | 144 |
| Rhododendron trichocladum | 77 | 166 |
| Rhododendron trichostomum | 56 | 122 |
| Rhododendron trichostomum | 60 | 46 |
| Rhododendron trichostomum | 64 | 251 |
| Rhododendron trichostomum | 67 | 343, 344C |
| Rhododendron trichostomum | 72 | 309 |
| Rhododendron trichostomum | 73 | 268 |
| Rhododendron trichostomum | 75 | 432 |
| Rhododendron trichostomum var. ledioides | 59 | 36 |
| Rhododendron trichostomum var. ledioides 'Chappel's Var' | 59 | 36 |
| Rhododendron triflorum | 75 | 360 |
| Rhododendron triflorum var. mahogani | 75 | 353C |
| Rhododendron trilectorum | 72 | 304 |
| Rhododendron trilectorum | 75 | 363 |
| Rhododendron truncicolum | 47 | 58 |
| Rhododendron tsangpoense | 8 | 129 |
| Rhododendron tsangpoense | 28 | 33 |
| Rhododendron tsariense | 72 | 304 |
| Rhododendron tsariense | 75 | 362 |
| Rhododendron tschonoskii | 55 | 316 |
| Rhododendron tsusiophyllum | 42 | 286 |
| Rhododendron ungernii | 68 | 106 |
| Rhododendron ungernii | 83 | 54C |
| Rhododendron uniflorum | 75 | 357 |
| Rhododendron uniflorum var. imperator | 73 | 87 |
| Rhododendron uvarifolium var. griseum | 75 | 354, 360 |
| Rhododendron uvariifolium var. griseum | 83 | 132, 134C |
| Rhododendron vaccinioides | 59 | 268 |
| Rhododendron x valaspis | 22 | 236 |
| Rhododendron valentinianum | 1 | 108 |
| Rhododendron valentinianum | 22 | 236 |
| Rhododendron vandeursenii | 49 | 74 |
| Rhododendron virgatum | 1 | 107 |
| Rhododendron virgatum | 75 | 359 |
| Rhododendron virgatum subsp. oleifolium | 51 | 143 |
| Rhododendron viridescens | 67 | 344 |
| Rhododendron viridescens | 75 | 354, 357 |
| Rhododendron vitis-idaea | 47 | 58 |
| Rhododendron 'Wagtail' | 71 | 216 |
| Rhododendron wallichii | 59 | 268 |
| Rhododendron wallichii | 74 | 197, 198 |
| Rhododendron wardii | 56 | 294C, 297 |
| Rhododendron wardii | 64 | 251 |
| Rhododendron wardii | 73 | 52 |
| Rhododendron wardii | 75 | 353C, 360C, 377 |
| Rhododendron wardii | 79 | 65 |
| Rhododendron watsonii | 60 | 67 |
| Rhododendron 'Wee Bee' | 71 | 216 |
| Rhododendron wightii | 18 | 59 |
| Rhododendron wightii | 49 | 218, 222P |
| Rhododendron wightii | 75 | 328 |
| Rhododendron williamsianum | 1 | 108 |
| Rhododendron williamsianum | 2 | 298, 299P, 376 |
| Rhododendron williamsianum | 8 | 130 |
| Rhododendron williamsianum | 19 | 67, 148 |
| Rhododendron williamsianum | 21 | 258 |
| Rhododendron williamsianum | 24 | 354, 356P |
| Rhododendron williamsianum | 27 | 257 |
| Rhododendron williamsianum | 28 | 33 |
| Rhododendron williamsianum | 34 | 337 |
| Rhododendron williamsianum | 35 | 69 |
| Rhododendron williamsianum | 40 | 126 |
| Rhododendron williamsianum | 61 | 230 |
| Rhododendron williamsianum | 71 | 215 |
| Rhododendron wiltonii | 70 | 306 |
| Rhododendron womersleyi | 47 | 59, 198, 199P |
| Rhododendron womersleyi | 49 | 72P, 75 |
| Rhododendron womersleyi | 58 | 245, 250C |
| Rhododendron 'Wren' | 54 | 68 |
| Rhododendron 'Wren' | 66 | 55 |
| Rhododendron wrightianum | 47 | 58 |
| Rhododendron xanthocodon var. concatenans | 72 | 325C, 327 |
| Rhododendron 'Yaku Fairy' | 56 | 70 |
| Rhododendron 'Yaku Fairy' | 66 | 55 |
| Rhododendron yakushimanum | 65 | 197 |
| Rhododendron yakushimanum | 71 | 215 |
| Rhododendron yedoense poukhanense | 28 | 74 |
| Rhododendron yelliottii | 49 | 76 |
| Rhododendron yelliottii | 58 | 245 |
| Rhododendron 'Yellow Hammer' | 19 | 150 |
| Rhododendron 'Yellow Hammer' | 27 | 254 |
| Rhododendron yunnanense | 51 | 144 |
| Rhododendron yunnanense | 56 | 21, 27, 115, 122, 127, 292, 295, 298 |
| Rhododendron yunnanense | 64 | 137, 157, 250 |
| Rhododendron yunnanense | 73 | 51 |
| Rhododendron zoelleri | 47 | 57 |