| No. | Cultivar Name | Plant Size | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Source | Registered |
|
1
| 'Ra' | Large | Yellow | | | Hybrid | Pale-Lavender | July to August | Balitewicz, Bob | --NR-- |
|
2
| 'Radiant Light' | Medium | Light-Green | | | Unknown | Unknown | Unknown | Livingston, Ron | --NR-- |
|
3
| 'Rapture' | Giant | Yellow | | | Unknown | Unknown | Unknown | Lydell, Ransom | .2000 |
|
4
| 'Rasputin' | Medium | Yellow | | | Unknown | Unknown | Unknown | Ziarek, Ken | --NR-- |
|
5
| 'Red Neck Heaven' | Medium | Med-Green | | | Hybrid | Pure-White | July to August | Avent, Tony | .1998 |
|
6
| 'Red Sea' | Large | Med-Green | Streaked | White | Unknown | Unknown | Unknown | Unknown | --NR-- |
|
7
| 'Redneck Mardi Gras' | Small | Yellow | | | Unknown | Deep-Purple | August to September | Duncan, Mary Jo | .2016 |
|
8
| 'Reflected Glory' | Large | Med-Green | Marginal | Light Green | Unknown | Med-Lavender | June to July | Seaver, Mildred & Seaver, Charles | .2015 |
|
9
| 'Resurrection Galaxy' | Large | Dark-Green | Streaked | Speckles | Sport | Med-Lavender | July | Elslager, Ed | .1999 |
|
10
| 'Revelations' | Large | Light-Green | Marginal | Green | Sport | Light-Purple | July to August | Moore, Ernest | .1993 |
|
11
| 'Reverend Mac' | Medium | Blue/Green | | | Sport | Pale-Lavender | July to August | Van Eechaute, Danny | .2011 |
|
12
| 'Rick's Blessings' | Unknown | Unknown | | | Unknown | Unknown | Unknown | Unknown | --NR-- |
|
13
| 'Righteous Rays' | Medium | Yellow | | | Hybrid | Med-Lavender | August | Snyder, Ron | .2003 |
|
14
| 'Rock of Ages' | Giant | Blue/Green | | | Sport | Pure-White | June to July | Ward, Dr Dick & Ward, Jane | .2009 |
|
15
| 'Rosedale Golden Chalice' | Large | Yellow | | | Unknown | Pure-White | Unknown | Hadrava, Jerry | .1999 |
|
16
| 'Ruth' | Medium | Blue/Green | | | Sport | Pale-Lavender | June to July | Schwarz, Jim & Schwarz, Karen | .2014 |
|