| Miltoniopsis Professor Picard | 01 Jan 1957 | Miltoniopsis Belgica × Miltoniopsis William Pitt |
| Miltoniopsis Sans Famille | 01 Jan 1950 | Miltoniopsis William Pitt × Miltoniopsis Robert Paterson |
| Miltoniopsis Rosy Dawn | 01 Jan 1949 | Miltoniopsis Limelight × Miltoniopsis William Pitt |
| Miltoniopsis Sylvia | 01 Jan 1940 | na ? × Miltoniopsis William Pitt |
| Miltoniopsis Evelyn Andreas | 01 Jan 1939 | Miltoniopsis William Pitt × Miltoniopsis Albert Burrage |
| Miltoniopsis Frances Howard | 01 Jan 1938 | Miltoniopsis Marietta Armacost × Miltoniopsis William Pitt |
| Miltoniopsis Fritzie | 01 Jan 1938 | Miltoniopsis Cecilia × Miltoniopsis William Pitt |
| Miltoniopsis Walhall | 01 Jan 1938 | Miltoniopsis Mona × Miltoniopsis William Pitt |
| Miltoniopsis Delyse | 01 Jan 1938 | Miltoniopsis Lyona × Miltoniopsis William Pitt |
| Miltoniopsis Lawnacres | 01 Jan 1937 | Miltoniopsis Princess Margaret × Miltoniopsis William Pitt |
| Oncidopsis Roma | 01 Jan 1937 | Oncidopsis Numa × Miltoniopsis William Pitt |
| Oncidopsis Maysie | 01 Jan 1937 | Oncidopsis Leda × Miltoniopsis William Pitt |
| Cyrtoniopsis Bragelonne | 01 Jan 1937 | Cyrtoniopsis Brugensis × Miltoniopsis William Pitt |
| Oncidopsis Meda | 01 Jan 1936 | Miltoniopsis William Pitt × Oncidium Proteus |
| Miltoniopsis Firefly | 01 Jan 1936 | Miltoniopsis Glow × Miltoniopsis William Pitt |
| Miltoniopsis Crowborough | 01 Jan 1935 | Miltoniopsis Isabel Sander × Miltoniopsis William Pitt |
| Miltoniopsis Southport | 01 Jan 1935 | Miltoniopsis Nadia × Miltoniopsis William Pitt |
| Miltoniopsis Swinburn | 01 Jan 1935 | Miltoniopsis T. B. Armstrong × Miltoniopsis William Pitt |
| Miltoniopsis Pansy | 01 Jan 1935 | Miltoniopsis Sanderae × Miltoniopsis William Pitt |
| Oncidopsis Prunella | 01 Jan 1935 | Oncidopsis Harwoodii × Miltoniopsis William Pitt |
| Miltoniopsis Beaufront | 01 Jan 1935 | Miltoniopsis Princess Elizabeth × Miltoniopsis William Pitt |
| Miltoniopsis Alnwick | 01 Jan 1935 | Miltoniopsis Princesse Astrid × Miltoniopsis William Pitt |
| Miltoniopsis Tactician | 01 Jan 1934 | Miltoniopsis Telka × Miltoniopsis William Pitt |
| Oncidopsis Deva | 01 Jan 1934 | Miltoniopsis William Pitt × Oncidium alexandrae |
| Oncidopsis Paulina | 01 Jan 1933 | Oncidopsis Duchess of York × Miltoniopsis William Pitt |
| Miltoniopsis Queen | 01 Jan 1933 | Miltoniopsis Reine Elisabeth × Miltoniopsis William Pitt |
| Miltoniopsis Mrs. Louise Wightman | 01 Jan 1933 | Miltoniopsis Leonard Hatcher × Miltoniopsis William Pitt |
| Miltoniopsis Titania | 01 Jan 1933 | Miltoniopsis Armstrongii × Miltoniopsis William Pitt |
| Miltoniopsis Armanda | 01 Jan 1933 | Miltoniopsis Pulchra × Miltoniopsis William Pitt |
| Miltoniopsis Governor | 01 Jan 1932 | Miltoniopsis Venus × Miltoniopsis William Pitt |
| Miltoniopsis Huntsman | 01 Jan 1932 | Miltoniopsis Hypatia × Miltoniopsis William Pitt |
| Miltoniopsis Astronomer | 01 Jan 1932 | Miltoniopsis Greta × Miltoniopsis William Pitt |
| Miltoniopsis Coquelicot | 01 Jan 1932 | Miltoniopsis Hyeana × Miltoniopsis William Pitt |
| Miltoniopsis Craftsman | 01 Jan 1932 | Miltoniopsis Orissa × Miltoniopsis William Pitt |
| Miltoniopsis Laelia | 01 Jan 1931 | Miltoniopsis Lucia × Miltoniopsis William Pitt |
| Miltoniopsis Dusky Maid | 01 Jan 1930 | Miltoniopsis Kennie × Miltoniopsis William Pitt |
| Miltoniopsis Marion Bruce | 01 Jan 1930 | Miltoniopsis Gloriosa × Miltoniopsis William Pitt |
| Oncidopsis Ramona | 01 Jan 1930 | Oncidopsis Sappho × Miltoniopsis William Pitt |
| Oncidopsis Averna | 01 Jan 1930 | Oncidopsis Rutherford's Sylvia × Miltoniopsis William Pitt |
| Miltoniopsis Sheila | 01 Jan 1930 | Miltoniopsis Beau Brummel × Miltoniopsis William Pitt |
| Oncidopsis Ardonia | 01 Jan 1930 | Miltoniopsis William Pitt × Oncidium Clonius |
| Oncidopsis Estella Jewell | 01 Jan 1930 | Oncidopsis Aspasia × Miltoniopsis William Pitt |
| Miltoniopsis Chelsea | 01 Jan 1930 | Miltoniopsis Sanderiana × Miltoniopsis William Pitt |
| Miltoniopsis F. E. Dixon | 01 Jan 1929 | Miltoniopsis Freya × Miltoniopsis William Pitt |
| Oncidopsis Numa | 01 Jan 1929 | Oncidopsis Latona × Miltoniopsis William Pitt |
| Oncidopsis Regia | 01 Jan 1929 | Oncidopsis Helga × Miltoniopsis William Pitt |
| Miltoniopsis Ethel H. du Pont | 01 Jan 1929 | Miltoniopsis Lena × Miltoniopsis William Pitt |
| Miltoniopsis Memoria H. T. Pitt | 01 Jan 1928 | Miltoniopsis Princess Mary × Miltoniopsis William Pitt |
| Miltoniopsis Vida | 01 Jan 1928 | Miltoniopsis Bleuana × Miltoniopsis William Pitt |
| Oncidopsis Vesta | 01 Jan 1928 | Oncidopsis Dora × Miltoniopsis William Pitt |
| Oncidopsis Windsor | 01 Jan 1928 | Miltoniopsis William Pitt × Oncidium Trident |
| Miltoniopsis Pulchra | 01 Jan 1928 | Miltoniopsis Lycaena × Miltoniopsis William Pitt |
| Miltoniopsis Esla | 01 Jan 1928 | Miltoniopsis Saint Andre × Miltoniopsis William Pitt |
| Miltoniopsis Greta | 01 Jan 1927 | Miltoniopsis Jules Hye de Crom × Miltoniopsis William Pitt |
| Miltoniopsis Telka | 01 Jan 1927 | Miltoniopsis vexillaria × Miltoniopsis William Pitt |
| Miltoniopsis Freya | 01 Jan 1927 | Miltoniopsis Lady Veitch × Miltoniopsis William Pitt |
| Miltoniopsis Elsie | 01 Jan 1927 | Miltoniopsis roezlii × Miltoniopsis William Pitt |
| Miltoniopsis Armstrongii | 01 Jan 1923 | Miltoniopsis Miss Louisa Fowler × Miltoniopsis William Pitt |