| No. | Cultivar Name | Plant Size | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Source | Registered |
|
1
| 'Oakview' | Small | Blue/Green | | | Unknown | Med-Lavender | June to July | Stone, David & Ruh, Peter | .1987 |
|
2
| 'Ohh! Viola' | Medium | Yellow | | | Unknown | Near-White | June to July | Schulz, Ed | .2015 |
|
3
| 'Olive Branch' | Medium | Med-Green | Medial | Yellow | TC Sport | Pale-Lavender | July | Moldovan, Steve & Ruh, Peter & Ruh, Jean | .2008 |
|
4
| 'Olive Oil' | Medium | Yellow | | | Hybrid | Pale-Lavender | Unknown | Dishon, Jim | .1996 |
|
5
| 'Orange Crush' | Medium | Med-Green | Marginal | Creamy White | Hybrid | Pale-Lavender | July | Elslager, Ed | .2000 |
|
6
| 'Orange Joy' | Small | Yellow | | | Hybrid | Light-Purple | July | Carpenter, Kate | .1979 |
|
7
| 'Orange Marmalade' | Large | Med-Green | Medial | White | Sport | Pale-Lavender | July to August | Solberg, Robert | .2002 |
|
8
| 'Orange Rose' | Small | Dark-Green | Medial | Yellow | Sport | Unknown | June to July | McHugh, Ed | .2012 |
|
9
| 'Orange Slices' | Medium | Yellow | | | TC Sport | Pale-Lavender | July to August | Zilis, Mark | .2003 |
|
10
| 'Orange Star' | Medium | Yellow | | | Sport | Pale-Lavender | July to August | Van den Top, Jan | --NR-- |
|