| Paphiopedilum Audrey SacherPaph. Audrey Sacher | | Feb 2 1966 | Ratcliffe |
| Paphiopedilum JudithPaph. Judith | | Jan 1 1966 | The Lord Sieff |
| Paphiopedilum Michael SieffPaph. Michael Sieff | | Jan 1 1966 | The Lord Sieff |
| Paphiopedilum Elaine BlondPaph. Elaine Blond | | Jan 1 1966 | Ratcliffe |
| Paphiopedilum AmandaPaph. Amanda | | Jan 29 1965 | The Lord Sieff |
| Paphiopedilum Miriam SacherPaph. Miriam Sacher | | Jan 1 1965 | Ratcliffe |
| Cymbidium DanielaCym. Daniela | | Jan 1 1965 | The Lord Sieff |
| Cymbidium Simon MarcusCym. Simon Marcus | | Jan 1 1965 | Ratcliffe |
| Rhyncholaeliocattleya Lily SieffRlc. Lily Sieff | | Jan 1 1964 | The Lord Sieff |
| Cymbidium Dallia LernerCym. Dallia Lerner | | Jan 1 1964 | Ratcliffe |
| Paphiopedilum LetitziaPaph. Letitzia | | Jan 1 1962 | The Lord Sieff |
| Paphiopedilum Oak RosePaph. Oak Rose | | Jan 1 1962 | The Lord Sieff |
| Paphiopedilum IzalcoPaph. Izalco | | Jan 1 1962 | The Lord Sieff |
| Cymbidium IsmosCym. Ismos | | Jan 1 1961 | Ratcliffe |
| Paphiopedilum MatabelePaph. Matabele | | Jan 1 1958 | The Lord Sieff |
| Paphiopedilum BeaudallaPaph. Beaudalla | | Nov 30 1957 | The Lord Sieff |
| Paphiopedilum AliescumPaph. Aliescum | | Nov 30 1957 | The Lord Sieff |
| Paphiopedilum ArchatonPaph. Archaton | | Mar 5 1957 | The Lord Sieff |
| Paphiopedilum CavatinaPaph. Cavatina | | Mar 5 1957 | The Lord Sieff |
| Paphiopedilum BeckyPaph. Becky | | Mar 5 1957 | The Lord Sieff |
| Paphiopedilum Rose BeauPaph. Rose Beau | | Jan 1 1957 | The Lord Sieff |
| Paphiopedilum June BraePaph. June Brae | | Jan 1 1957 | The Lord Sieff |
| Paphiopedilum Peter AdamPaph. Peter Adam | | Jan 1 1957 | The Lord Sieff |
| Paphiopedilum Giant SimonPaph. Giant Simon | | Jan 1 1957 | The Lord Sieff |
| Paphiopedilum RestdalePaph. Restdale | | Jan 1 1957 | The Lord Sieff |
| Paphiopedilum MasqueradePaph. Masquerade | | Jan 1 1957 | The Lord Sieff |
| Cymbidium WhimseyCym. Whimsey | | Jan 1 1956 | The Lord Sieff |
| Rhyncholaeliocattleya Brenda SieffRlc. Brenda Sieffintergeneric | | Jan 1 1956 | Ratcliffe |
| Oncidium Maureen (1956)Onc. Maureen (1956) | | Jan 1 1956 | Ratcliffe |
| Paphiopedilum TelmondPaph. Telmond | | Jan 1 1956 | Ratcliffe |
| Cattleya Virginia SieffC. Virginia Sieff | | Jan 1 1956 | Ratcliffe |
| Rhyncholaeliocattleya Daphne SieffRlc. Daphne Sieffintergeneric | | Jan 1 1956 | Ratcliffe |
| Cymbidium UrsulianaCym. Ursuliana | | Jan 1 1956 | The Lord Sieff |
| Cattleya Golden MaxineC. Golden Maxine | | Jan 1 1955 | Sanders[St Albans] |
| Oncidium Adam SieffOnc. Adam Sieff | | Jan 1 1955 | Ratcliffe |
| Miltoniopsis Diana LernerMps. Diana Lerner | | Jan 1 1955 | The Lord Sieff |
| Cattleya MicaelaC. Micaela | | Jan 1 1955 | Ratcliffe |
| Rhyncholaeliocattleya Carol AdamRlc. Carol Adamintergeneric | | Jan 1 1955 | Charlesworth Ltd. |
| Cymbidium Ann LambtonCym. Ann Lambton | | Jan 1 1955 | Ratcliffe |
| Cattleya Lola BaerC. Lola Baer | | Jan 1 1955 | Charlesworth Ltd. |
| Cattleya Ursula AdamC. Ursula Adam | | Jan 1 1955 | Ratcliffe |
| Oncidium Violet ByeOnc. Violet Bye | | Jan 1 1954 | Ratcliffe |
| Paphiopedilum Simon MarksPaph. Simon Marks | | Jan 1 1954 | The Lord Sieff |
| Rhyncholaeliocattleya LoisaRlc. Loisaintergeneric | | Jan 1 1954 | The Lord Sieff |
| Cymbidium NickyCym. Nicky | | Jan 1 1954 | Ratcliffe |
| Paphiopedilum Marcus SieffPaph. Marcus Sieff | | Jan 1 1954 | Black & Flory |
| Paphiopedilum SaramiaPaph. Saramia | | Jan 1 1954 | The Lord Sieff |
| Cymbidium JuliettaCym. Julietta | | Jan 1 1954 | Ratcliffe |
| Cattleya Miriam MarksC. Miriam Marks | | Jan 1 1954 | Ratcliffe |
| Cymbidium Jonathan SieffCym. Jonathan Sieff | | Jan 1 1954 | Cooke |
| Cattleya SumeriaC. Sumeria | | Jan 1 1954 | Charlesworth Ltd. |
| Dendrobium Kenneth ByeDen. Kenneth Bye | | Jan 1 1954 | The Lord Sieff |
| Oncidium Lane EndOnc. Lane End | | Jan 1 1953 | The Lord Sieff |
| Rhyncholaeliocattleya J. H. RobinsonRlc. J. H. Robinsonintergeneric | | Jan 1 1953 | The Lord Sieff |
| Rhyncholaeliocattleya Rebecca SieffRlc. Rebecca Sieffintergeneric | | Jan 1 1953 | The Lord Sieff |