| Medium Size Hostas | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Source | Registered |
| 'X Factor' | Blue/Green | - | - | Hybrid | Pale-Lavender | June into July | Ward, Dr Dick & Jane | .2013 |
| 'X Philes' | Dark-Green | Medial | White | Unknown | - | - | Unknown | --NR-- |
| 'Xanadu Butterscotch Drizzle' | Med-Green | Streaked | Yellow | Hybrid | Pale-Lavender | - | Skaggs, Virginia & Brian | --NR-- |
| 'Xanadu Dlanor' | Light-Green | Marginal | Yellow | Hybrid | Pale-Lavender | June into July | Skaggs, Virginia & Brian | --NR-- |
| 'Xanadu Ephemeral Gold' | Yellow | - | - | Hybrid | Med-Lavender | - | Skaggs, Virginia & Brian | --NR-- |
| 'Xanadu Paisley' | Yellow | Streaked | Speckles | Nat-Sport | Pale-Lavender | July into August | Skaggs, Virginia & Brian | .2000 |
| 'Xanadu Sommer Time' | Med-Green | Medial | Yellow | Nat-Sport | Med-Lavender | - | Skaggs, Virginia & Brian | --NR-- |
| 'Xanadu Xavior' | Dark-Green | - | - | Hybrid | - | - | Skaggs, Virginia & Brian | --NR-- |
| 'Xanthos' | Yellow | - | - | Hybrid | - | - | Malloy, Alex | --NR-- |
| 'X-cellent' | Dark-Green | Medial | Yellow | Unknown | Pale-Lavender | July | Beilstein, Doug | .2018 |
| 'Xenos' | Med-Green | Marginal | White | Unknown | - | - | Unknown | --NR-- |
| 'Xerxes' | Med-Green | Streaked | White | Hybrid | Pale-Lavender | August | Malloy, Alex | .2002 |
| 'Xiphoid' | Med-Green | Marginal | White | Nat-Sport | Pale-Lavender | - | Malloy, Alex | --NR-- |
| 'Xmas' | Med-Green | Marginal | White | Nat-Sport | Near-White | July into August | Kerr, Jeff | .2000 |
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