| Cultivar Name | Plant Size | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Source | Registered |
| 'Barbara' | Medium | Blue-Green | | | Unknown | Pale-Purple | July | Stone, David & Ruh, Peter | 1987 |
| 'Beaulah' | Small | Green | Marginal | Yellow | Unknown | Pale-Purple | August | Stone, David & Ruh, Peter | 1988 |
| 'Blue Boy' | Large | Blue-Green | | | Hybrid | Pale-Lavender | | Stone, David & AHS | 1986 |
| 'Blue Rock' | Giant | Blue-Green | | | Unknown | Near-White | June into July | Fisher, Eunice V. & Stone, David | 1986 |
| 'Bonnie' | Large | Blue-Green | | | Unknown | Near-White | June into July | Stone, David | 1987 |
| 'Brooke' | Large | Green | | | Unknown | Pale-Lavender | July | Stone, David & Ruh, Peter | 1987 |
| 'Bruce' | Small | Green | | | Unknown | Med-Lavender | June into July | Stone, David & Ruh, Peter | 2002 |
| 'Carrie Ann' | Small | Blue-Green | Marginal | White | Unknown | Pure-White | August | Stone, David & Ruh, Peter | 1988 |
| 'Dustin' | Medium | Green | Marginal | White | Unknown | Pale-Lavender | July into August | Stone, David & Ruh, Peter | 1988 |
| 'Eireann' | Large | Blue-Green | | | Unknown | Pale-Lavender | July into August | Stone, David & Ruh, Peter | 1991 |
| 'Ellen' | Small | Green | | | Unknown | Pale-Purple | July | Stone, David & Ruh, Peter | 1987 |
| 'Emerald Gem' | Small | Yellow | | | Unknown | Pale-Purple | July | Stone, David & Ruh, Peter | 1991 |
| 'Excalibur' | Small | Blue-Green | Marginal | White | Unknown | Pale-Purple | August | Stone, David & AHS | 1986 |
| 'Hazel' | Small | Yellow | | | Unknown | Pale-Purple | July | Stone, David | 1987 |
| 'Jo Jo' | Small | Green | Marginal | White | Unknown | Pale-Purple | August | Stone, David & Ruh, Peter | 1987 |
| 'Leprechaun' | Miniature | Green | | | Unknown | Pale-Purple | July | Stone, David & Ruh, Peter | 1991 |
| 'Little Ann' | Miniature | Green | Marginal | White | Unknown | Pale-Purple | August | Stone, David & Ruh, Peter | 1988 |
| 'Margaret' | Miniature | Green | | | Unknown | Pale-Purple | August | Stone, David & Ruh, Peter | 1987 |
| 'Mary Jo' | Small | Blue-Green | | | Unknown | Pale-Lavender | July | Stone, David & Ruh, Peter | 1987 |
| 'Pauline' | Small | Green | | | Unknown | Med-Lavender | August to October | Stone, David & Ruh, Peter | 1987 |
| 'Pearl Lake' | Medium | Blue-Green | | | Unknown | Pale-Lavender | July | Stone, David | 1982 |
| 'Piedmont Gold' | Large | Yellow | | | Unknown | Near-White | June into July | Stone, David | 1982 |
| 'Piedmont's Gold Miniature' | Miniature | Yellow | | | Unknown | Pale-Purple | July | Stone, David | NR |
| 'Stone's Valentine' | Medium | Yellow | | | Unknown | Med-Lavender | July | Stone, David & Ruh, Peter | 1989 |
| 'Sunnybrook' | Medium | Blue-Green | Marginal | Yellow | Unknown | Near-White | June | Stone, David & Ruh, Peter & Banyai, Pauline | 1987 |
| 'Wolcott' | Giant | Dark Green | Streaked | Speckles | Hybrid | Pale-Lavender | June into July | Stone, David | 1982 |
|