| No. | Cultivar Name | Plant Size | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Source | Registered |
|
1
| 'Champion' | Large | Dark-Green | | - | Hybrid | Near-White | June into July | Simpers, Lucille & Soules, Marjorie | .1985 |
|
2
| 'Clear Fork River Valley' | Large | Dark-Green | | - | Hybrid | Near-White | June into July | Wade, Van | .2007 |
|
3
| 'Cloud Illusions' | Large | Med-Green | | | Hybrid | Deep-Purple | July into August | Dean, Don | .2022 |
|
4
| 'Commander Adama' | Medium | Med-Green | Marginal | White | Nat-Sport | Pale-Lavender | July into August | Rank, Stefan | --NR-- |
|
5
| 'Convexity' | Medium | Yellow | | | Unknown | Unknown | Unknown | Wols, Dan | --NR-- |
|
6
| 'Cookie Monster' | Large | Yellow | | - | Hybrid | Unknown | - | Kuk, Bob | --NR-- |
|
7
| 'Country Candied Confection' | Medium | Blue/Green | | - | Hybrid | Pale-Lavender | August | Dean, Don | .2020 |
|
8
| 'Country Flamethrower' | Medium | Yellow | | | Hybrid | Pale-Lavender | August | Dean, Don | .2022 |
|
9
| 'Cowboy Man in Black' | Large | Dark-Green | | | Unknown | Unknown | - | Gamradt, John | --NR-- |
|
10
| 'Cuyahoga Valley' | Medium | Yellow-Gold | Marginal | Green | Unknown | Unknown | - | Adams, Dan | --NR-- |
|
11
| 'Cyberstar' | Giant | Dark-Green | Marginal | White | Hybrid | Near-White | June into July | Elslager, Ed | .2002 |
|