| No. | Cultivar Name | Plant Size | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Source | Registered |
|
1
| 'Oasis' (Ward) | Large | Blue/Green | - | - | Unknown | Near-White | June into July | Ward, Dr Dick & Ward, Jane | .2012 |
|
2
| 'One and Only' | Large | Yellow | - | - | Hybrid | Pale-Lavender | June into July | Ward, Dr Dick & Ward, Jane | .2015 |
|
3
| 'One Fine Day' | Medium | Med-Green | Marginal | Yellow | Hybrid | Near-White | June into July | Ward, Dr Dick & Ward, Jane | .2012 |
|
4
| 'Only You' | Medium | Med-Green | Marginal | White | Hybrid | - | - | Ward, Dr Dick & Ward, Jane | .2012 |
|
5
| 'Oracle' | Giant | Med-Green | - | - | Unknown | - | June into July | Ward, Dr Dick & Ward, Jane | .2003 |
|
6
| 'Orion's Belt' | Large | Blue/Green | - | - | Hybrid | Pale-Lavender | July | Ward, Dr Dick & Ward, Jane | .2003 |
|
7
| 'Over the Moon' | Medium | Med-Green | Marginal | White | Hybrid | - | June into July | Ward, Dr Dick & Ward, Jane | .2010 |
|