| No. | Cultivar Name | Plant Size | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Source | Registered |
|
1
| 'Abby' | Small | Med-Green | Marginal | Yellow | Sport | Pale-Lavender | June into July | Ruh, Peter | .1990 |
|
2
| 'Abiqua Big Sky' | Giant | Blue/Green | | - | Unknown | Unknown | June into July | Purtymun, Charles & Ruh, Peter & Ruh, Jean | .2008 |
|
3
| 'Akane' | Medium | Dark-Green | | - | Unknown | Light-Purple | August to September | Watanabe, Kenji & Hawes, James & Ruh, Peter & Ruh, Jean | .2010 |
|
4
| 'Aksarben' | Giant | Blue/Green | | - | Hybrid | Near-White | June into July | Geissler, Julia & Ruh, Peter | .1988 |
|
5
| 'Alaskan Halo' | Large | Med-Green | Marginal | White | Sport | Pale-Lavender | July into August | Ruh, Peter | .1997 |
|
6
| 'Albert Lea' | Large | Blue/Green | | - | Sport | Near-White | June into July | Ruh, Peter | .1999 |
|
7
| 'Allegan Emperor' | Giant | Blue/Green | | - | Hybrid | Pale-Lavender | July | Herrema, Ken & Deshane, H. & Ruh, Peter | .2000 |
|
8
| 'Allegan Fog' | Medium | Med-Green | Streaked | Speckles | Hybrid | Pale-Lavender | July into August | Herrema, Ken & Ruh, Peter | .2000 |
|
9
| 'Allegan Gent' | Large | Blue/Green | Marginal | Speckles | Sport | Near-White | June into July | Herrema, Ken & Ruh, Peter | .2000 |
|
10
| 'Alma' | Small | Yellow | | - | Unknown | Light-Purple | August | Krossa, Gus & Ruh, Peter | .1995 |
|
11
| 'Amanuma' | Small | Med-Green | | - | Hybrid | Light-Purple | July | Maekawa, Dr Fumio & Ruh, Peter | .2002 |
|
12
| 'Amethyst Joy' | Medium | Med-Green | | - | Hybrid | Unknown | July into August | Sugita, Hajime & Ruh, Peter | .1999 .2000 |
|
13
| 'Andrew Jackson' | Giant | Blue/Green | | - | Unknown | Near-White | June into July | Sugita, Hajime & Ruh, Peter & Ruh, Jean | .2001 |
|
14
| 'Ani Machi' | Medium | Med-Green | Medial | Greenish White | Unknown | Light-Purple | August to September | Ruh, Peter & Ruh, Jean | .2002 .2018 |
|
15
| 'Antioch' | Large | Med-Green | Marginal | Creamy White | Unknown | Pale-Lavender | July into August | Tompkins, Cynthia & Hofer, Paul & Ruh, Peter | .1979 |
|
16
| 'Arctic Circle' | Medium | Med-Green | Marginal | White | Unknown | Pale-Lavender | July into August | Tompkins, Chet & Ruh, Peter & Ruh, Jean | .2002 |
|
17
| 'Arctic Sunset' | Medium | Light-Green | Streaked | Yellow | Sport | Med-Lavender | August to September | Ruh, Peter & Ruh, Jean | .2005 |
|
18
| 'August Moon' | Large | Yellow | | - | Hybrid | Pale-Lavender | July into August | Langfelder, Richard & Ruh, Peter | .1996 |
|
19
| 'Azure Cherub' | Medium | Blue/Green | | - | Unknown | Pale-Lavender | July into August | Ruh, Peter | .2002 |
|
20
| 'Azure Snow' | Large | Blue/Green | | - | Hybrid | Pale-Lavender | August September October | Ruh, Peter | .1991 |
|