Cultivar Name Source Plant Size Leaf Color Variegation Var Color Origin Flower Color Season Registered 'Ebony and Ivory' Scheer, Alttara Small Light-Green - - Unknown - - --NR-- 'Eireann' Stone, David & Ruh, Peter Large Blue/Green - - Unknown Pale-Lavender July into August .1991 'Ellen' Stone, David & Ruh, Peter Small Med-Green - - Hybrid Light-Purple July .1987 'Emerald Gem' Stone, David & Ruh, Peter Small Yellow - - Unknown Light-Purple July .1991 'Emerald Green Metallic' O'Brien, John Large Med-Green - - Unknown Near-White July --NR-- 'Excalibur' Stone, David & AHS Small Blue/Green Marginal White Unknown Light-Purple August .1986
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