No. | Cultivar Name | Plant Size | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Source | Registered |
1
| 'Radio Waves' | Small | Med-Green | | | Hybrid | Pale-Lavender | August | Johnson, Greg | .2004 |
2
| 'Raspberries and Cream' | Small | Med-Green | | | TC Sport | Light-Purple | August | Zilis, Mark | .2004 |
3
| 'Rebecca' | Large | Yellow | | | Hybrid | Pale-Lavender | July | Zilis, Mark | .2004 |
4
| 'Red Hot Flash' | Small | Yellow | Marginal | Green | Sport | Deep-Purple | July | Machen, John | .2004 |
5
| 'Red Sails in the Sunset' | Small | Light-Green | | | Hybrid | Light-Purple | August | Van Ostrand, John | .2004 |
6
| 'Rhythm and Blues' | Small | Blue/Green | | | Hybrid | Pale-Lavender | July to August | Johnson, Greg | .2004 |
7
| 'Richmond' | Medium | Med-Green | Marginal | Yellow | Hybrid | Pale-Lavender | July | Seaver, Mildred | .2004 |
8
| 'Ring Around the Moon' | Large | Blue/Green | Medial | Yellow | Sport | Pale-Lavender | July to August | Johnson, Robert | .2004 |
9
| 'Rod's Gold' | Medium | Yellow | | | Hybrid | Pale-Lavender | June to July | Kuenster, Rod | .2004 |
10
| 'Ron Damant' | Medium | Blue/Green | Marginal | Yellow | Sport | Pale-Lavender | July | Ford, Richard & Ford, Mary | .2004 |
11
| 'Rough and Ready' | Large | Dark-Green | Streaked | Yellow | Hybrid | Near-White | June to July | Elslager, Ed | .2004 |
12
| 'Royal Golden Jubilee' | Medium | Med-Green | Medial | Yellow | Sport | Pale-Lavender | July | Ford, Richard & Ford, Mary | .2004 |
13
| 'Royal Mouse Ears' | Small | Blue/Green | Streaked | White | TC Sport | Light-Purple | July | Deckert, Emile & Deckert, Jane | .2004 |
14
| 'Royal Wave' | Small | Blue/Green | Streaked | White | Sport | Pale-Lavender | June to July | Johnson, Greg | .2004 |
|