| No. | Cultivar Name | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Source | Registered |
|
1
| 'Rain Forest' | Med-Green | - | - | Hybrid | Pale-Lavender | August to October | Goodwin, Randy | .1996 |
|
2
| 'Rainbow Delight' | Med-Green | Streaked | White | Unknown | - | July into August | Benedict, Dr Ralph (Herb) & Kuenster, Rod | .2010 |
|
3
| 'Rashao Iwa' | Dark-Green | - | - | Unknown | - | - | Suzuki, Kichigoro | --NR-- |
|
4
| 'Raspberry Meringue' | Dark-Green | Medial | Chartreuse | TC Sport | Deep-Purple | August | Zilis, Mark | .2003 |
|
5
| 'Raving Beauty' | Yellow | - | - | Unknown | - | - | Goodwin, Randy | .2003 |
|
6
| 'Razz'n Rick' | Med-Green | Streaked | Yellow | Unknown | - | August to September | Schmidt, Bevie | .2009 |
|
7
| 'Reiho' | Med-Green | Medial | White | Hybrid | - | - | Unknown | --NR-- |
|
8
| 'Rhino Blue' | Blue/Green | - | - | Sport | Near-White | June into July | Rawson, Don | .2010 |
|
9
| 'Rhino Gold' | Yellow | - | - | Sport | Near-White | June into July | Rawson, Don | --NR-- |
|
10
| 'Rhino Hide' | Blue/Green | Medial | Yellow | Unknown | Near-White | June into July | Rawson, Don | .2007 |
|
11
| 'Rhino Tuff' | Blue/Green | - | - | Sport | Near-White | June into July | Rawson, Don | --NR-- |
|
12
| 'Rix Pix' | Yellow | - | - | Hybrid | Near-White | June into July | Gilligan, Madelon & Goodenough, Rick | .2015 .2018 |
|
13
| 'Robin's Pride' | Blue/Green | - | - | Unknown | - | June into July | Goodwin, Randy | .2000 |
|
14
| 'Roundhouse Blues' | Blue/Green | - | - | Unknown | Near-White | June into July | Micheletti, Tom | .1998 |
|
15
| 'Royal Mouse Ears' | Blue/Green | Streaked | White | TC Sport | Light-Purple | July | Deckert, Emile & Deckert, Jane | .2004 |
|