| Entry | Volume | Pages |
|---|---|---|
| Helleborus | 54 | 200, 386 |
| Helleborus foetidus 'Wester Flisk' | 81 | 314 |
| Helleborus x hybridus | 80 | 306, 307C |
| Helleborus x hybridus | 81 | 313 |
| Helleborus niger | 80 | 21-22 |
| Helleborus niger | 81 | 313, 370, 371C |
| Helleborus niger 'Blackthorn Strain' | 81 | 314 |
| Helleborus x nigercors | 80 | 304 |
| Helleborus thibetanus | 80 | 312 |
| Helleborus thibetanus | 81 | 429 |
| Helleborus torquatus hybrids | 80 | 306 |
| Helleborus vesicarius | 81 | 427, 428C |
| Helleborus viridis | 81 | 350C, 354 |
| Helleborus abschasicus | 35 | 5P |
| Helleborus abschasicus x guttatus | 46 | 235C, 240 |
| Helleborus 'Aeneas' | 61 | 60, 64 |
| Helleborus argutifolius | 31 | 208 |
| Helleborus argutifolius | 55 | 74P, 78, 132C, 135, 136 |
| Helleborus argutifolius | 74 | 25, 49 |
| Helleborus atrorubens | 48 | 270, 321 |
| Helleborus atrorubens | 49 | 332 |
| Helleborus atrorubens | 61 | 59C, 60 |
| Helleborus atrorubens of gardens | 35 | 5P |
| Helleborus 'Blue Spray' | 61 | 67C |
| Helleborus bocconei | 35 | 13P |
| Helleborus chinensis | 35 | 6P |
| Helleborus corsicus | 2 | 182 |
| Helleborus corsicus | 18 | 345F.C.C. |
| Helleborus corsicus | 20 | 25 |
| Helleborus corsicus | 22 | 45 |
| Helleborus corsicus | 23 | 336 |
| Helleborus corsicus | 26 | 216 |
| Helleborus corsicus | 28 | 291 |
| Helleborus corsicus | 29 | 200 |
| Helleborus 'Cosmos' | 78 | 390 |
| Helleborus cyclophyllus | 32 | 319 |
| Helleborus cyclophyllus | 35 | 13P |
| Helleborus cyclophyllus | 39 | 111 |
| Helleborus cyclophyllus | 43 | 320 |
| Helleborus cyclophyllus | 48 | 4, 5P |
| Helleborus cyclophyllus | 50 | 335, 346 |
| Helleborus cyclophyllus | 66 | 203 |
| Helleborus cyclophyllus | 68 | 332, 392, 403 |
| Helleborus 'Dido' | 61 | 60, 64 |
| Helleborus dumetorum | 22 | 350 |
| Helleborus dumetorum | 26 | 11 |
| Helleborus dumetorum | 39 | 111 |
| Helleborus dumetorum | 61 | 59C, 63 |
| Helleborus dumetorum | 75 | 41 |
| Helleborus dumetorum atrorubens | 35 | 6P |
| Helleborus foetidus | 17 | 281 |
| Helleborus foetidus | 22 | 345 |
| Helleborus foetidus | 24 | 69 |
| Helleborus foetidus | 26 | 216 |
| Helleborus foetidus | 28 | 20 |
| Helleborus foetidus | 30 | 305 |
| Helleborus foetidus | 34 | 257 |
| Helleborus foetidus | 35 | 12P |
| Helleborus foetidus | 45 | 309 |
| Helleborus foetidus | 46 | 96, 215 |
| Helleborus foetidus | 50 | 73 |
| Helleborus foetidus | 51 | 170 |
| Helleborus foetidus | 52 | 171 |
| Helleborus foetidus | 66 | 158C |
| Helleborus foetidus | 67 | 107, 111 |
| Helleborus x hybridus | 75 | 23C, 40C, 41C |
| Helleborus x hybridus | 76 | 28C, 173C |
| Helleborus x hybridus | 77 | 320C |
| Helleborus x hybridus | 78 | 143C |
| Helleborus index to species | 35 | 9 |
| Helleborus intermedius | 61 | 63 |
| Helleborus kochii | 20 | 53, 334 |
| Helleborus kochii | 52 | 41 |
| Helleborus 'Little Stripey' | 61 | 65 |
| Helleborus lividus | 2 | 290P, 295, 393 |
| Helleborus lividus | 20 | 22, 23P |
| Helleborus lividus | 23 | 20 |
| Helleborus lividus | 35 | 20P |
| Helleborus lividus | 38 | 350 |
| Helleborus lividus | 42 | 277 |
| Helleborus lividus | 50 | 346 |
| Helleborus lividus | 53 | 235-8, 239P |
| Helleborus lividus | 58 | 348A.M.* |
| Helleborus lividus subsp. corsicus | 35 | 20P |
| Helleborus lividus subsp. corsicus | 50 | 73 |
| Helleborus monograph | 35 | 1 |
| Helleborus 'Montenegran Doubles' | 61 | 67 |
| Helleborus multifidus | 9 | 251 |
| Helleborus multifidus | 35 | 12P |
| Helleborus multifidus | 39 | 111, 197 |
| Helleborus multifidus | 61 | 60, 62 |
| Helleborus multifidus subsp. hercegovinus | 61 | 59C |
| Helleborus multifidus subsp. serbicus | 61 | 63 |
| Helleborus 'Nero' | 61 | 65 |
| Helleborus niger | 18 | 345A.M. |
| Helleborus niger | 22 | 48 |
| Helleborus niger | 23 | 335 |
| Helleborus niger | 25 | 144, 311, 324P |
| Helleborus niger | 26 | 59P |
| Helleborus niger | 27 | 82 |
| Helleborus niger | 29 | R 140 |
| Helleborus niger | 31 | 238 |
| Helleborus niger | 32 | 261 |
| Helleborus niger | 34 | 327 |
| Helleborus niger | 36 | 78 |
| Helleborus niger | 44 | 327 |
| Helleborus niger | 51 | 80 |
| Helleborus niger | 52 | 410 |
| Helleborus niger | 64 | 473-476*, 474C, 475C, 476C |
| Helleborus niger | 74 | 165C |
| Helleborus niger var. altifolius | 47 | 159 |
| Helleborus niger forms and vars. | 25 | 325 |
| Helleborus niger subsp. macranthus | 31 | 238 |
| Helleborus niger subsp. macranthus | 35 | 19P |
| Helleborus niger subsp. macranthus | 39 | 109 |
| Helleborus niger subsp. macranthus | 41 | 168 |
| Helleborus niger 'Potters Wheel' | 33 | 116, 117C |
| Helleborus niger 'Potters Wheel' | 49 | 332 |
| Helleborus niger 'Potters Wheel' | 50 | 92 |
| Helleborus x nigricors 'Beatrix' | 41 | 147 |
| Helleborus occidentalis | 35 | 12P |
| Helleborus odorus | 6 | 2 |
| Helleborus odorus | 35 | 13P |
| Helleborus odorus | 39 | 107 |
| Helleborus odorus | 53 | 202C, 203 |
| Helleborus odorus | 54 | 217 |
| Helleborus odorus subsp. istriacus | 39 | 200 |
| Helleborus orientalis | 18 | 345A.M. |
| Helleborus orientalis | 33 | 298 |
| Helleborus orientalis | 35 | 14P |
| Helleborus orientalis | 36 | 231 |
| Helleborus orientalis | 46 | 240 |
| Helleborus orientalis | 49 | 13 |
| Helleborus orientalis | 50 | 340 |
| Helleborus orientalis | 61 | 60 |
| Helleborus orientalis | 74 | 188 |
| Helleborus orientalis subsp. abschasicus | 61 | 67 |
| Helleborus 'Paul Voelcker' | 58 | 22 |
| Helleborus 'Paul Voelcker' | 61 | 67 |
| Helleborus 'Pluto' | 61 | 67 |
| Helleborus purpurascens | 19 | 208 |
| Helleborus purpurascens | 29 | 37P, 40 |
| Helleborus purpurascens | 35 | 13P |
| Helleborus purpurascens | 61 | 60 |
| Helleborus purpurascens | 74 | 484P.C. |
| Helleborus 'Ruth Voelcker' | 58 | 22 |
| Helleborus 'Ruth Voelcker' | 61 | 67 |
| Helleborus serbicus | 39 | 111 |
| Helleborus x sternii | 35 | 14P |
| Helleborus x sternii | 50 | 73 |
| Helleborus thibetanus | 35 | 19P |
| Helleborus thibetanus | 65 | 411-412P.C., 437B.C. |
| Helleborus thibetanus | 66 | 131C |
| Helleborus thibetanus | 69 | 485A.M. |
| Helleborus thibetanus | 70 | 367 |
| Helleborus thibetanus | 73 | 29C |
| Helleborus thibetanus | 78 | 479C, 481 |
| Helleborus tibetica x purpurascens | 76 | 3C |
| Helleborus torquatus | 25 | 311 |
| Helleborus torquatus | 35 | 11P |
| Helleborus torquatus | 50 | 346 |
| Helleborus torquatus | 61 | 58, 59C, 61C, 62 |
| Helleborus torquatus 'Dido' | 58 | 22 |
| Helleborus 'Torquatus Hybrids' | 61 | 67 |
| Helleborus 'Torquatus Hybrids' seedling | 61 | 65C |
| Helleborus torquatus 'Tinkerbell' | 78 | 4C, 68 |
| Helleborus vesicarius | 35 | 11P, 12P |
| Helleborus vesicarius | 39 | 281 |
| Helleborus vesicarius | 49 | 312 |
| Helleborus vesicarius | 61 | 81 |
| Helleborus vesicarius | 64 | 455- 456B.C. |
| Helleborus vesicarius | 67 | 230C, 231 |
| Helleborus vesicarius | 68 | 34C |
| Helleborus vesicarius | 74 | 184 |
| Helleborus vesicarius 'Walberton's Rosemary' | 78 | 127C*, 128C, 129 |
| Helleborus viridis | 3 | 104 |
| Helleborus viridis | 4 | 98 |
| Helleborus viridis | 18 | 345 |
| Helleborus viridis | 22 | 354 |
| Helleborus viridis | 23 | 336 |
| Helleborus viridis | 24 | 69 |
| Helleborus viridis | 30 | 308 |
| Helleborus viridis | 31 | 238 |
| Helleborus viridis | 33 | 339 |
| Helleborus viridis | 36 | 216, 239 |
| Helleborus viridis | 44 | 327 |
| Helleborus viridis | 50 | 73 |
| Helleborus viridis | 53 | 303 |
| Helleborus 'Wolverton Hybrids' | 61 | 67 |