| Cultivar | Plant Size | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Source | Registered |
| H. sieboldii | Small | Med-Green | Marginal | White | Unknown | Light-Purple | August | Species from Japan | --NR-- |
| 'Shirobuchi' | Small | Med-Green | Marginal | Yellow | Nat-Sport | Deep-Purple | August | Unknown | --NR-- |
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