| Cultivar Name | Plant Size | Leaf Color | Variegation | Var Color | Origin | Season | Source | Registered |
| 'Carolina Keepsake' | Small | Yellow | | - | Hybrid | August to September | Solberg, Robert | .2016 |
| 'Cemetery Road' | Large | Med-Green | Streaked | White | Hybrid | August to September | Kuenster, Rod | .2011 |
| 'Chinese Gold' | Medium | Yellow | | - | Hybrid | August to September | Wade, Van & Walek, Kevin | .2009 |
| 'Chinese Sunrise' | Medium | Med-Green | Marginal | Greenish White | Nat-Sport | August to September | Schaeffer, Robert & Ruh, Peter | .1992 |
| 'Chopsticks' | Medium | Med-Green | | - | Hybrid | September to October | Herold, Roy & Walek, Kevin | .2009 |
| 'Coach Paul Castro' | Medium | Med-Green | Streaked | Yellow | Hybrid | August to September | Freeman, Franc | .2010 |
| 'Coach Terry Paustian' | Small | Med-Green | Streaked | Yellow | Hybrid | August to September | Freeman, Franc | .2010 |
| 'Colonel Murphy' | Giant | Blue/Green | | - | Unknown | July into September | Zolock, Steve & Sarah | .2001 |
| 'Colored Cascade' | Medium | Blue/Green | Streaked | - | Nat-Sport | August to September | Unknown | --NR-- |
| 'Compass Rose' | Small | Med-Green | | - | Unknown | August to September | Goodwin, Randy | .2013 |
| 'Concord' | Small | Dark-Green | | - | Hybrid | September to October | Lydell, Ransom | .2000 |
| 'Cooltini' | Small | Blue/Green | | - | Hybrid | August to September | Zilis, Mark | .2009 |
| 'Count Dracula' | Medium | Dark-Green | | - | Unknown | August to September | Crockett, Clyde | .1997 |
| 'Crows Landing Lime Sorbet' | Large | Light-Green | Marginal | White | Unknown | August to September | Stygall, Patsy | .2011 |
| 'Crows Landing Rippled Truffles' | Medium | Med-Green | Marginal | Yellow | Unknown | August to September | Stygall, Patsy | .2011 |
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