| No. | Cultivar Name | Plant Size | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Source | Registered |
|
1
| 'Rambunctious' | Giant | Blue/Green | | - | Unknown | Near-White | July | Struhar, Bill | .2018 |
|
2
| 'Rare Breed' | Medium | Med-Green | Medial | White | Hybrid | Near-White | June into July | Livingston, Ron & The American Hosta Society | .2019 |
|
3
| 'Red Corvette' | Medium | Med-Green | | - | Hybrid | Light-Purple | August to September | Moore, Jeff & Schwarz, Jim | .2015 |
|
4
| 'Relentless' | Medium | Yellow | | | Hybrid | Pale-Lavender | July | Dean, Don | .2022 |
|
5
| 'Remembrance' | Medium | Blue/Green | Marginal | Yellow | Hybrid | Unknown | June into July | Skaggs, Virginia & Skaggs, Brian & Gilligan, Madelon | .2015 |
|
6
| 'Rendezvous' | Medium | Blue/Green | Marginal | White | Sport | Pale-Lavender | July into August | Zilis, Mark & Schwarz, Jim | .2014 |
|
7
| 'Richland Reward' | Medium | Yellow | Marginal | White | TC Sport | Pale-Lavender | July into August | Schulz, Ed | .2014 |
|
8
| 'Rockstar Evie, Golfer Gracie' | Medium | Yellow-Gold | | | Hybrid | Pale-Lavender | July | Kwick, Charles | .2021 |
|
9
| 'Rookie Mouse' | Miniature | Med-Green | | - | Sport | Light-Purple | June into July | Szustakiewicz, Peter | --NR-- |
|
10
| 'Rough Lemon' | Medium | Yellow | | | Hybrid | Light-Purple | July into August | Solberg, Robert | .2022 |
|
11
| 'Royal Wedding' | Medium | Med-Green | Marginal | White | TC Sport | Pure-White | August to September | Bergeron, Amy & Walters Gardens | .2014 |
|
12
| 'RSVP' | Small | Dark-Green | Marginal | White | Unknown | Light-Purple | August | Lysne, Rod | .2022 |
|