Hybrid Hostas | Pod Parent | x Pollen Parent | Source | Registered |
'Hakuyo' | Hosta pycnophylla | Unknown | Watanabe, Kenji & Ruh, Peter | .2002 |
'Kinba' | Hosta pycnophylla | Hosta pycnophylla | Watanabe, Kenji & Walek, Kevin & The American Hosta Society | .2009 |
'Ko Iwa' | Hosta longipes - | Unknown | Watanabe, Kenji | --NR-- |
'Kurumazaki' | Hosta montana - | Unknown | Watanabe, Kenji | --NR-- |
'Ogon Ko Urajiro' | 'Ko Urajiro' | Unknown | Watanabe, Kenji | --NR-- |
'Sanshoku Tsushima' | Hosta tsushimensis | Unknown | Watanabe, Kenji | --NR-- |
'Setsurei' | Hosta hypoleuca | Hosta pycnophylla | Watanabe, Kenji | --NR-- |
'Shichu-no-Tama' | 'Undulata' | Unknown | Watanabe, Kenji | --NR-- |
'Shima Kabitan' | 'Kabitan' | Unknown | Watanabe, Kenji | --NR-- |
'Taika Oba' | Hosta montana - | Unknown | Watanabe, Kenji | --NR-- |
'Urajiro Ko Iwa' | Hosta longipes - | Unknown | Watanabe, Kenji | --NR-- |
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