No. | Cultivar Name | Leaf Color | Plant Size | Variegation | Var Color | Origin | Flower Color | Season | Source | Registered |
1
| 'L'lle d'Orleans' | Light-Green | Medium | | | Unknown | Near-White | Unknown | Bastille, Jocelyne | --NR-- |
2
| 'Oberland Advanced Technology' | Light-Green | Large | Marginal | White | Unknown | Pale-Lavender | July to August | Rank, Stefan | .2013 |
3
| 'Ocean Isle Gold Dust' | Light-Green | Medium | Medial | Yellow | Sport | Med-Lavender | July to August | Chopko, Dave | --NR-- |
4
| 'October Skies' | Light-Green | Large | | | Unknown | Unknown | Unknown | Bemis, Royall | --NR-- |
5
| 'Odo' | Light-Green | Small | Marginal | Dark Green | Unknown | Unknown | Unknown | Dupre, Dirk | --NR-- |
6
| 'Ogon Hime' (Sieboldii) | Light-Green | Unknown | | | Sport | Unknown | Unknown | Unknown | --NR-- |
7
| 'Ogon Hime Tokudama' | Light-Green | Small | | | Unknown | Pale-Lavender | June to July | Unknown & Ruh, Peter | .2002 .2018 |
8
| 'Ogon Tachi' | Light-Green | Large | | | Unknown | Deep-Purple | August | Unknown & Ruh, Peter | .2002 .2018 |
9
| 'Oh Audrey' | Light-Green | Medium | Marginal | White | Sport | Pure-White | June to July | Silvers, Bill | .2013 |
10
| 'Oh Cindy' | Light-Green | Medium | | | Sport | Pale-Lavender | July | Benedict, Dr Ralph (Herb) | --NR-- |
11
| 'Oh My Darling' | Light-Green | Small | | | Unknown | Unknown | Unknown | Unknown | --NR-- |
12
| 'Old Ironsides' | Light-Green | Giant | | | Sport | Med-Lavender | July | Summers, Alex | --NR-- |
13
| 'Olympic Magic' | Light-Green | Medium | Streaked | Speckles | Sport | Pale-Lavender | July | Naylor Creek Nursery | --NR-- |
14
| 'Omatsu-san Nishiki' | Light-Green | Small | | | Unknown | Light-Purple | Unknown | Ruh, Peter | .2002 .2018 |
15
| 'On Parade' | Light-Green | Miniature | Medial | White | Hybrid | Med-Lavender | July | Malloy, Alex | .2003 |
16
| 'On the Edge' | Light-Green | Medium | Marginal | Blue-Green | Sport | Near-White | June | Scolnik, Patricia | --NR-- |
17
| 'Ophir' | Light-Green | Medium | | | Unknown | Pale-Lavender | Unknown | Fischer, Dr Ulrich | --NR-- |
18
| 'Orphan Train Rider' | Light-Green | Small | | | Unknown | Med-Lavender | July to August | Kwick, Charles | .2017 |
19
| 'Osiris Illumination' | Light-Green | Giant | | | Unknown | Unknown | Unknown | Fafard, Serge | --NR-- |
20
| 'Osiris Mignonne' | Light-Green | Small | Marginal | White | Unknown | Unknown | Unknown | Fafard, Serge | --NR-- |
21
| 'Osiris Mirage' | Light-Green | Small | Marginal | White | Unknown | Unknown | Unknown | Fafard, Serge | --NR-- |
22
| 'Out of Print' | Light-Green | Small | Medial | Yellow | Unknown | Unknown | Unknown | Van Eechaute, Danny | --NR-- |
23
| 'Outer Space' | Light-Green | Small | Marginal | White | Sport | Pale-Lavender | July | Malloy, Alex | .2003 |
24
| 'Outside' | Light-Green | Small | Marginal | Yellow | Unknown | Unknown | Unknown | Goodwin, Randy | --NR-- |
25
| 'Over Yu Wu' | Light-Green | Giant | | | Hybrid | Near-White | July to August | Daughenbaugh, Walt | .2021 |
26
| 'Owens Outrage' | Light-Green | Medium | | | Unknown | Med-Lavender | Unknown | Moore, Jeff | --NR-- |
27
| 'Ozark Welcome' | Light-Green | Medium | Medial | Yellow | Sport | Pale-Lavender | June to July | Helsley, Calvin | .2004 |
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