| No. | Cultivar | Plant Size | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Source | Registered |
|
1
| 'Crowned Imperial' | Medium | Blue/Green | Marginal | White | Sport | Pale-Lavender | July to August | Walters Gardens | .1988 |
|
2
| 'Hirao Imperial' | Small | Med-Green | | | Unknown | Pale-Lavender | August to September to October | Hirao, Shuichi & Ruh, Peter | .1998 |
|
3
| 'Imperial Crown' | Large | Med-Green | Marginal | White | Unknown | Unknown | Unknown | Unknown | --NR-- |
|
4
| 'Imperial Dragon' | Large | Dark-Green | Medial | White | Sport | Near-White | June to July | Schwarz, Jim | .2011 |
|
5
| 'Imperial Majesty' | Large | Med-Green | | | Hybrid | Pale-Lavender | August | Sellers, Van & Ruh, Peter | .2003 |
|
6
| 'Imperial Moth' | Medium | Light-Green | | | Unknown | Light-Purple | July | Seaver, Mildred | .2004 |
|
7
| 'Imperial Palace' | Large | Dark-Green | Medial | Yellow | Hybrid | Pale-Lavender | June to July | Ward, Dr Dick & Ward, Jane | .2009 |
|
8
| 'Imperial Potentate' | Large | Med-Green | Streaked | Speckles | Sport | Pale-Lavender | July to August | Benedict, Dr Ralph (Herb) & Benedict, Dorothy | .1999 |
|
9
| 'Yellow Imperial Banner' | Large | Yellow | | | Unknown | Unknown | Unknown | Unknown | --NR-- |
|