Cultivar Name | Plant Size | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Source | Registered |
'Cascades' | Medium | Blue/Green | Medial | White | Hybrid | Pure-White | July | Lachman, Wm & Lachman, Eleanor | .1993 |
'Cascades Streaked' | Medium | Med-Green | Streaked | Speckles | Sport | Pure-White | July | Lachman, Wm & Lachman, Eleanor | --NR-- |
'Cascading Waters' | Large | Med-Green | Marginal | White | Hybrid | Pale-Lavender | August | Dean, Don | .2005 |
'Cedar River' | Large | Dark-Green | - | - | Unknown | - | - | Malloy, Alex | --NR-- |
'Chesapeake Bay' | Large | Blue/Green | - | - | Hybrid | Near-White | July | Petryszyn, Olga | .2004 |
'Clattering Water' | Medium | Blue/Green | - | - | Sport | Med-Lavender | - | Fransen, Marco & Fransen, Joyce | --NR-- |
'Colorado River' | Small | Dark-Green | - | - | Hybrid | Pale-Lavender | August | Beilstein, Doug & Malloy, Alex | .2005 |
'Connecticut River' | Medium | Blue/Green | - | - | Hybrid | Pale-Lavender | - | Beilstein, Doug & Malloy, Alex | .2005 |
'Cosmic River' | Medium | Med-Green | Streaked | Yellow | Hybrid | Med-Lavender | July into August | Kuenster, Rod | .2011 |
'Cosmic Watercolors' | Medium | Med-Green | Streaked | Yellow | Hybrid | Near-White | July into August | Kuenster, Rod | .2011 |
'Crater Lake' | Large | Blue/Green | - | - | Hybrid | Near-White | June into July | Snyder, Ron | .1996 |
'Crested Reef' | Large | Med-Green | - | - | Hybrid | Pale-Lavender | July | Minks, Eldren | .1975 |
'Crested Surf' | Medium | Med-Green | Marginal | Creamy White | Hybrid | Light-Purple | August | Benedict, Dr Ralph (Herb) | .1990 |
'Crossing the Rubicon' | Medium | Yellow | - | - | TC Sport | - | June into July | Zilis, Mark | .2009 |
'Crossroads Whirlpool' | Medium | Blue/Green | Streaked | White | Hybrid | Pale-Lavender | July into August | England, Tim | .2003 |
'Crystal Fountain' | Large | Yellow | - | - | Sport | Light-Purple | July | Banyai, Bruce | .1999 |
'Cuyahoga' | Medium | Med-Green | Marginal | Yellow | Hybrid | - | July into August | Zilis, Mark | .2009 |
'Cuyahoga Falls' | Medium | Dark-Green | - | - | Sport | - | July into August | Zilis, Mark | .2010 |
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