| Cultivar Name | Plant Size | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Source | Registered |
| 'Celebration' | Medium | Med-Green | Medial | White | Hybrid | Deep-Purple | - | Aden, Paul | .1978 |
| 'Chartreuse Edger' | Small | - | - | - | Unknown | Light-Purple | - | Aden, Paul | --NR-- |
| 'Chartreuse Waves' | Small | Yellow | - | - | Hybrid | - | - | Aden, Paul & Zilis, Mark | .2010 |
| 'Chartreuse Wedge' | Giant | Med-Green | - | - | Hybrid | Pale-Lavender | July into August | Aden, Paul | .1976 |
| 'Chartreuse Wiggles' | Small | Yellow | - | - | Hybrid | Light-Purple | August | Aden, Paul | .1976 |
| 'Cheesecake' | Miniature | Med-Green | Marginal | White | Sport | Light-Purple | August | Aden, Paul & Zilis, Mark | .2010 |
| 'Christopher Wayne' | Large | Blue/Green | - | - | Unknown | - | - | Aden, Paul | --NR-- |
| 'Citation' | Medium | Med-Green | Marginal | Creamy White | Hybrid | Pale-Lavender | July into August | Aden, Paul | .1980 |
| 'City Lights' | Large | Yellow | - | - | Hybrid | Near-White | June into July | Aden, Paul | .1978 |
| 'Color Accord' | Medium | Med-Green | Streaked | Speckles | Hybrid | Pale-Lavender | July | Aden, Paul | .1982 |
| 'Color Fantasy' | Medium | Blue/Green | Streaked | Speckles | Hybrid | Med-Lavender | August | Aden, Paul | .1980 |
| 'Color Glory' | Large | Blue/Green | Medial | Yellow | Hybrid | Pale-Lavender | - | Aden, Paul | .1980 |
| 'Color Magic' | Small | Blue/Green | Streaked | White | Unknown | - | - | Aden, Paul | --NR-- |
| 'Comeuppance' | Medium | Med-Green | - | - | Hybrid | Pure-White | July | Aden, Paul | .1982 |
| 'Contender' | Large | Light-Green | - | - | Unknown | - | - | Aden, Paul | --NR-- |
| 'Conversation Piece' | Small | - | Streaked | - | Unknown | - | - | Aden, Paul | --NR-- |
| 'Counter Point' | Large | Med-Green | Marginal | White | Sport | Pale-Lavender | July | Aden, Paul | .1982 |
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