Cultivar Name Plant Size Leaf Color Variegation Var Color Origin Flower Color Season Source Registered 'Yellow River' Medium Med-Green Marginal Yellow Unknown Near-White July Smith, Eric & Ruh, Peter .1993 'Yellow Waves' Small Yellow - - Hybrid Light-Purple August Aden, Paul .1978 'Yukon River' Medium Blue/Green - - Unknown - - Malloy, Alex --NR--
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