| Thumb of Child | Child Cultivar | Cultivar's Parentage |
|---|---|---|
| Tall Bearded Iris (Iris 'Chaste Morn') | Distinction x Marian Lapham | |
| Tall Bearded Iris (Iris 'Maykiss') | Marian Lapham x Yellow Moon | |
| Tall Bearded Iris (Iris 'Mitzi') | Marian Lapham x Yellow Moon | |
| Tall Bearded Iris (Iris 'Spring Idyl') | (Eloise Lapham x Marian Lapham) X Cook P. 231: (Wild Rose x pink Williamson seedling) |
