| No. | Cultivar Name | Hostas Noted as a Certain Type |
|
1
| 'Oasis' (Ward) | (TYPE) 'Sieboldiana' ++(SAME.NAME) 'Oasis' (Malloy) |
|
2
| 'Oder' | (GENETIC BACKGROUND) 'Elegans', Hosta longipes, Hosta longipes lancea, 'Sieboldiana', 'Tardiflora' ++(TYPE) Tardiana |
|
3
| 'Okutama Nishiki' | (TYPE) Hosta longipes |
|
4
| 'Orinoco Flow' | (GENETIC BACKGROUND) 'Glacier Cascade', Hosta hypoleuca, Hosta kikutii ++(TYPE) Hosta montana |
|
5
| 'Osiris Blue Night' | (TYPE) 'Sieboldiana' |
|
6
| 'Osiris Giant Green' | (TYPE) 'Sieboldiana' |
|
7
| 'Osprey' | (GENETIC BACKGROUND) 'Elegans', Hosta longipes, Hosta longipes lancea, 'Sieboldiana', 'Tardiflora' ++(TYPE) Tardiana ++(SIMILAR.HOSTAS) 'Brother Ronald' |
|