No.Cultivar NamePlant SizeLeaf ColorVariegationVar ColorOriginFlower ColorSeasonSourceRegistered
1 'Il Gallo d'Oro'-Yellow-Gold--Unknown--Unknown--NR--
2 'L'Île d'Orléans'MediumLight-Green--UnknownNear-White-Bastille, Jocelyne--NR--
3 'O Fuji Fukurin'LargeMed-GreenStreakedYellowSportPale-Lavender-Unknown--NR--
4 'O Kanzashi'MediumMed-Green--SportLight-Purple-Unknown--NR--
5 'Oak Tree'----Duplicate--Duplicate Name--NR-
6 'Oasis' (Malloy) - -Hybrid--Malloy, Alex--NR--
7 'Oba Kanzashi'----Unknown--Unknown--NR--
8 'Oberland Blue Dimension'MediumBlue/Green--Hybrid--Rank, Stefan--NR--
9 'Oberland Darkness'MediumDark-Green--Hybrid--Rank, Stefan--NR--
10 'Oberland Green Swallow'-Med-Green--Hybrid--Rank, Stefan--NR--
11 'Oberland Thin Line'MediumBlue/GreenMarginalYellowSportPale-LavenderJuly into AugustRank, Stefan--NR--
12 'Obscene Gesture'SmallMed-GreenStreakedWhiteTC SportPale-LavenderJulyAnderson, Jim--NR--
13 'Obscura'----Duplicate--Duplicate Name--NR--
14 'Obscura Albo-marginata'----Duplicate--Duplicate Name--NR--
15 'Obscura Aureomarginata'----Duplicate--Hylander, Nils--NR--
16 'Ocean Dusk'----Unknown--Moore, Jeff--NR--
17 'Ocean Isle Abracadabra'SmallYellowMedialGreenSportPale-LavenderJulyChopko, Dave--NR--
18 'Ocean Isle Gold'LargeMed-GreenMarginalYellowUnknownNear-WhiteJune into JulyChopko, Dave--NR--
19 'Ocean Isle Gold Dust'MediumLight-GreenMedialYellowSportMed-LavenderJuly into AugustChopko, Dave--NR--
20 'Ocean Isle Tie Dye'MediumYellowMedialGreenSportPale-LavenderJuneChopko, Dave--NR--
21 'Ocean Isle Tornado'MediumMed-GreenMedialWhiteSportMed-LavenderJuly into AugustChopko, Dave--NR--
22 'Ocean Tide'LargeBlue/Green--HybridNear-WhiteJune into JulyMondt, Manfred--NR--
23 'Oceans Away'GiantBlue/Green--Unknown-June into JulyHanson, Curt--NR--
24 'Ocean's Fury'LargeBlue/Green--Unknown--Rawson, Don--NR--
25 'October Fest'MediumBlue/GreenMarginalYellowTC SportLight-PurpleJune into JulyVan den Top, Jan--NR--
26 'October Skies'LargeLight-Green--Unknown--Bemis, Royall--NR--
27 'October Statement'----Unknown--Summers, Alex--NR--
28 'Oder'MediumBlue/Green--UnknownMed-LavenderJuly into AugustKlose, Heinz--NR--
29 'Odina'LargeBlue/Green--Unknown--Wade, Van--NR--
30 'Odo'SmallLight-GreenMarginalDark GreenUnknown--Dupre, Dirk--NR--
31 'Og, Son of Fire'MiniatureMed-GreenMarginalWhiteHybrid--Beilstein, Doug & Malloy, Alex--NR--
32 'Oga'MediumMed-Green--HybridMed-LavenderAugustUnknown--NR--
33 'Oga Giboshi'----Duplicate--Duplicate Name--NR--
34 'Ogata Bunchoko'----Duplicate--Duplicate Name--NR--
35 'Oglala'GiantBlue/Green--Unknown--Wade, Van--NR--
36 'Ogon Akikaze'-Yellow--Hybrid--Unknown--NR--
37 'Ogon Albomarginata'SmallYellowMarginalWhiteSport--Unknown--NR--
38 'Ogon Amagi' ----Duplicate--Duplicate Name--NR--
39 'Ogon Baran'MediumYellow--HybridLight-PurpleJulyUnknown--NR--
40 'Ogon Chirifu Hime'SmallMed-Green--Unknown--Klose, Heinz--NR--
41 'Ogon Dai Tokudama'LargeYellow--Unknown--Watanabe, Kenji--NR--
42 'Ogon Fukurin Oba'----Duplicate--Duplicate Name--NR--
43 'Ogon Hime' (Landis)-Med-GreenMarginalYellowSport--Landis, Henry--NR--
44 'Ogon Hime' (Sieboldii)-Light-Green--Sport--Unknown--NR--
45 'Ogon Hime' (Watanabe)----Duplicate--Duplicate Name--NR--
46 'Ogon Iwa'MediumYellow--UnknownMed-LavenderAugust to SeptemberUnknown--NR--
47 'Ogon Kabitan'----Duplicate--Duplicate Name--NR--
48 'Ogon Kanzashi'MediumYellow--HybridDeep-PurpleJune into JulyUnknown--NR--
49 'Ogon Ko Urajiro'-Yellow--Hybrid--Watanabe, Kenji--NR--
50 'Ogon Koba'SmallYellow--UnknownLight-PurpleAugustUnknown--NR--
51 'Ogon Kuro'GiantYellow--SportPale-LavenderJuly into AugustUnknown--NR--
52 'Ogon Nishiki'----Unknown--Unknown--NR--
53 'Ogon Oba'MediumYellow--SportPale-LavenderJulyUnknown--NR--
54 'Ogon Otome'SmallYellow--UnknownDeep-PurpleJulyUnknown--NR--
55 'Ogon Otome Gibosa'SmallLight-Green--Unknown--Unknown--NR--
56 'Ogon Otome Hideko'MiniatureYellow--Unknown--Unknown--NR--
57 'Ogon Sagae'MediumYellow--UnknownPale-LavenderJuly into AugustUnknown--NR--
58 'Ogon Setouchi'MediumYellow--Sport--Unknown--NR--
59 'Ogon Tokudama'----Duplicate--Duplicate Name--NR--
60 'Ogon Urajiro'MediumYellow--Unknown--Unknown--NR--
61 'Ogon Wogon'-Yellow--Unknown--Epstein, Harold--NR--
62 'Oh Baby Mine'MiniatureDark-Green--Unknown--Unknown--NR--
63 'Oh Charlie'LargeMed-GreenMarginalYellowTC SportPale-LavenderJulyZiarek, Ken--NR--
64 'Oh Cindy'MediumLight-Green--SportPale-LavenderJulyBenedict, Dr Ralph (Herb)--NR--
65 'Oh Dannyboy'LargeDark-Green--Unknown--Skaggs, Virginia & Skaggs, Brian--NR--
66 'Oh Henry'MediumBlue/GreenStreakedYellowUnknown--Unknown--NR--
67 'Oh My Darling'SmallLight-Green--Unknown--Unknown--NR--
68 'Oh to Be Fourteen'LargeDark-Green--Unknown--Livingston, Ron--NR--
69 'Ohatsuki'----Duplicate--Duplicate Name--NR--
70 'O'Heartland Gold'-Yellow--Unknown--O'Harra, Russ--NR--
71 'Ohh! Richland Reward'MediumYellowMarginalWhiteTC SportPale-LavenderJuly into AugustSchulz, Ed--NR--
72 'Ohh! Tut's Treasure'MediumDark-GreenMarginalYellowSportNear-WhiteJune into JulySchulz, Ed--NR--
73 'Ohh! Ultra Aqua'MediumBlue/Green--Unknown--Schulz, Ed--NR--
74 'Ohigan Gibōshi'----Duplicate--Duplicate Name--NR--
75 'Ohio Blue'-Blue/Green--Unknown--Wade, Van--NR--
76 'Ohio River'MediumMed-Green--Hybrid--Beilstein, Doug & Malloy, Alex--NR--
77 'OHS Bryan's Blue'MediumBlue/Green--Hybrid--Ontario Hosta Society--NR--
78 'OHS Butter Pat'Medium---Hybrid--Ontario Hosta Society--NR--
79 'OHS Juno'MediumBlue/Green--SportPale-LavenderJuly into AugustOntario Hosta Society--NR--
80 'OHS Margot's Delight'MediumBlue/Green--SportPale-LavenderJuly into AugustOntario Hosta Society--NR--
81 'OHS Udo's Labour'----Unknown--Ontario Hosta Society--NR--
82 'Oil on Canvas'SmallMed-GreenStreakedWhiteSportMed-Lavender-Van Eechaute, Danny--NR--
83 'Ojibway'MediumBlue/Green--Unknown--Wade, Van--NR--
84 'Okan'LargeMed-GreenMarginalYellowUnknown--Unknown--NR--
85 'Okazaki Hajime' - -Hybrid--Sugita, Hajime & Ruh, Peter--NR--
86 'Okazaki Special'----Duplicate--Duplicate Name--NR--
87 'OKUHIDA'----Unknown--Unknown--NR--
88 'Okukuji Nakafu Iwa'MediumDark-GreenMedialYellowUnknown--Hisashi--NR--
89 'Okutama'Small---Sport--Unknown--NR--
90 'Okutama Nakafu'SmallMed-GreenMedialWhiteHybrid--Unknown--NR--
91 'Okutama Nishiki'SmallMed-GreenMedialYellowUnknownLight-PurpleAugust to OctoberUnknown--NR--
92 'Okuyama Giboshi'SmallDark-Green--Duplicate--Duplicate Name--NR--
93 'Old Arrowhead'Large---Unknown--Tompkins, Chet--NR--
94 'Old Cardboard Boxes'LargeBlue/Green--Unknown--Marcelle, Eric--NR--
95 'Old Frosty'LargeBlue/Green--Unknown--Rawson, Don--NR--
96 'Old Gold Edge'MediumDark-GreenMarginalYellowUnknown--Tompkins, Cynthia--NR--
97 'Old Hercules'----Duplicate--Duplicate Name--NR--
98 'Old Ironsides'GiantLight-Green--SportMed-LavenderJulySummers, Alex--NR--
99 'Old Jerusalem Road'LargeBlue/GreenStreakedWhiteUnknown--Goodenough, Rick--NR--
100 'Old Man and the Sea'----Hybrid--Moore, Jeff--NR--
101 'Old Rough House'GiantBlue/Green--Unknown--Wade, Van--NR--
102 'Old Yeller'LargeYellow--Hybrid--Unknown--NR--
103 'Olga'----Unknown--Unknown--NR--
104 'Olga Gibosa'LargeMed-Green--UnknownLight-PurpleJuly into AugustWade, Van--NR--
105 'Olga Giboshi'----Duplicate--Thiemann, Olga--NR--
106 'Olga Thiemann Dwarf Glaucous'----Duplicate--Thiemann, Olga--NR--
107 'Olive Oyl'LargeMed-GreenMarginalYellowUnknown--Carlson, Monty & Carlson, Julie--NR--
108 'Oliver'SmallMed-GreenMarginalWhiteUnknown--O'Harra, Russ--NR--
109 'Oliver Garden'MediumMed-GreenStreakedWhiteUnknown--Unknown--NR--
110 'Olive's Freckles'GiantMed-Green--UnknownPale-LavenderJulyPauley, Olive--NR--
111 'Olivia'MediumBlue/Green--UnknownNear-White-Schwarz, Jim--NR--
112 'Olympic Gold Medal'MediumYellow--SportPale-LavenderJuly into AugustFransen, Marco & Naylor Creek Nursery--NR--
113 'Olympic Magic'MediumLight-GreenStreakedSpecklesSportPale-LavenderJulyNaylor Creek Nursery--NR--
114 'Olympic Mist'LargeBlue/GreenStreakedSpecklesUnknown--Naylor Creek Nursery--NR--
115 'Olympic Silver Medal'MediumBlue/Green--SportPale-LavenderJuly into AugustFransen, Marco & Naylor Creek Nursery--NR--
116 'Olympic Twilight'MediumBlue/GreenMarginalYellowSportPale-LavenderJuly into AugustNaylor Creek Nursery--NR--
117 'Omaha'LargeBlue/Green--Unknown--Wade, Van--NR--
118 'Omar the Tentmaker'LargeMed-Green--Unknown--Unknown--NR--
119 'Oma's Sunrise'LargeBlue/Green--Unknown--Sisson, Kathie--NR--
120 'Omega'LargeMed-GreenMarginalYellowUnknown--Unknown--NR--
121 'OmegaOmega'----Unknown--Jolliffe, Thomas--NR--
122 'Omlett'LargeYellow--Hybrid--Kohlein, Fritz--NR--
123 'Omoto'----Duplicate--Duplicate Name--NR--
124 'On Angel Wings'LargeBlue/GreenStreakedWhiteUnknown--Goodenough, Rick--NR--
125 'On Show'----Duplicate--Duplicate Name--NR-
126 'On Stage'----Duplicate--Duplicate Name--NR--
127 'On the Edge'MediumLight-GreenMarginalBlue-GreenSportNear-WhiteJuneScolnik, Patricia--NR--
128 'One Cent'----Unknown--Jentsch, Klaus--NR--
129 'One Iota'SmallBlue/GreenMarginalWhiteTC SportLight-PurpleJulyAnderson, Jim--NR--
130 'One Iota Supreme'SmallBlue/GreenStreakedWhiteSportLight-PurpleJulySchwarz, Jim--NR--
131 'One Last Dance'LargeDark-GreenMarginalYellowTC SportNear-WhiteJulyHansen, Hans & Walters Gardens--NR--
132 'Oneida'MediumMed-Green--Unknown--Wade, Van--NR--
133 'Ontario Blue'LargeBlue/Green--Unknown--Wade, Van--NR--
134 'Ooltewah'----Unknown--Unknown--NR--
135 'Ooshima-jishi Hachijo'LargeMed-GreenMedialYellowUnknown--Unknown--NR--
136 'Opal Scepter'SmallYellowStreakedWhiteSportLight-PurpleJulyMeyer, Bill--NR--
137 'Ophir'MediumLight-Green--UnknownPale-Lavender-Fischer, Dr Ulrich--NR--
138 'Opipara Koriyama'MediumMed-GreenMarginalWhiteUnknownLight-PurpleAugustUnknown--NR--
139 'Opipara Noble One'----Duplicate--Duplicate Name--NR--
140 'Opipara Omatsa San'SmallMed-Green--Unknown--Unknown--NR--
141 'Oplosa'MediumBlue/GreenMarginalCreamy WhiteUnknown--Unknown--NR--
142 'Orange Ice'-Yellow--Unknown--Hawes, James--NR--
143 'Orange Star'MediumYellow--SportPale-LavenderJuly into AugustVan den Top, Jan--NR--
144 'Orca Whale'----Duplicate--Duplicate Name--NR--
145 'Oreo Cookies'----Duplicate--Duplicate Name--NR--
146 'Oreo Cream'MediumDark-GreenMedialWhiteSportPale-LavenderJuly into AugustZiarek, Ken--NR--
147 'Oriana'MediumYellow--SportPale-LavenderJuly into AugustSmith, Eric--NR--
148 'Oriental Sunrise'----Duplicate--Duplicate Name--NR--
149 'Orleans Island'----Duplicate--Duplicate Name--NR--
150 'Orphan Annie'MiniatureMed-GreenMarginalWhiteUnknownLight-PurpleJulyUnknown--NR--
151 'Oshimajishi'SmallDark-GreenMedialGreenHybrid--Unknown--NR--
152 'Oshkosh'-Med-Green--Hybrid--Fisher, Eunice V.--NR--
153 'Osiris Blue Night'LargeBlue/Green--Unknown--Fafard, Serge--NR--
154 'Osiris Folichon'MediumMed-Green--UnknownPale-LavenderAugustFafard, Serge--NR--
155 'Osiris Giant Green'GiantMed-Green--Unknown--Fafard, Serge--NR--
156 'Osiris Illumination'GiantLight-Green--Unknown--Fafard, Serge--NR--
157 'Osiris Insomniaque'MediumMed-GreenStreakedYellowUnknown--Fafard, Serge--NR--
158 'Osiris Louis Cyr'----Unknown--Fafard, Serge--NR--
159 'Osiris Marie Robillard'LargeBlue/GreenMarginalLight GreenUnknown--Fafard, Serge--NR--
160 'Osiris Mignonne'SmallLight-GreenMarginalWhiteUnknown--Fafard, Serge--NR--
161 'Osiris Mirage'SmallLight-GreenMarginalWhiteUnknown--Fafard, Serge--NR--
162 'Osiris Obscure'LargeDark-Green--Unknown--Fafard, Serge--NR--
163 'Osiris Ovation'LargeYellow--UnknownPale-Lavender-Fafard, Serge--NR--
164 'Osiris Pacha'MediumMed-GreenMarginalYellowUnknown--Fafard, Serge--NR--
165 'Osiris Petite Prince'----Duplicate--Duplicate Name--NR--
166 'Osiris Prestige'MediumDark-GreenMedialWhiteUnknownPale-Lavender-Fafard, Serge--NR--
167 'Osiris Sentinelle'LargeBlue/Green--Unknown--Fafard, Serge--NR--
168 'Osiris Soleil Levant'LargeMed-GreenMarginalYellowUnknown--Fafard, Serge--NR--
169 'Osiris Trouvaille'LargeBlue/GreenMarginalYellowUnknown--Fafard, Serge--NR--
170 'Otafuku'----Duplicate--Duplicate Name--NR--
171 'Otao Keikoku'SmallMed-Green--UnknownNear-WhiteAugustSavory, Robert--NR--
172 'Otara's Angel'LargeDark-GreenMarginalYellowSportNear-WhiteJune into JulyJohns, Eddie--NR--
173 'Otara's Sunrise'LargeMed-GreenMarginalWhiteUnknown--Johns, Eddie--NR--
174 'Otome'----Duplicate--Duplicate Name--NR--
175 'Otome Gibōshi'----Duplicate--Duplicate Name--NR--
176 'Otome Giboshi Fukurin'----Duplicate--Duplicate Name--NR--
177 'Otome Gokoro'-Med-GreenMarginalWhiteDuplicate--Duplicate Name--NR--
178 'Otome Shirofukurin'----Duplicate--Duplicate Name--NR--
179 'Otome-no-mai'MiniatureMed-GreenMedialWhiteHybridLight-PurpleJulyTanaka, Katsuyoshi--NR--
180 'Otome-no-mainakafi'SmallMed-Green--Unknown--Unknown--NR--
181 'Otome-no-Niji'-Med-GreenMedialWhiteUnknown--Unknown--NR--
182 'Ottawa'LargeMed-Green--Unknown--Wade, Van--NR--
183 'Otter Point'LargeMed-Green--UnknownMed-Lavender-Wrede, Arthur--NR--
184 'Our Child'MediumDark-GreenMarginalYellowUnknown--Unknown--NR--
185 'Our Friend Reldon'LargeBlue/Green--Hybrid--Van Wyke, Trudy--NR--
186 'Out of Print'SmallLight-GreenMedialYellowUnknown--Van Eechaute, Danny--NR--
187 'Outer Banks'-Blue/GreenStreakedWhiteHybrid--Goodenough, Rick--NR--
188 'Outrageous Benedict'----Unknown--Unknown--NR--
189 'Outside'SmallLight-GreenMarginalYellowUnknown--Goodwin, Randy--NR--
190 'Ovation'MediumYellow--HybridPale-LavenderJulyFafard, Serge--NR--
191 'Overserved'SmallYellow--Unknown--Shady Characters Nursery--NR--
192 'Owens Outrage'MediumLight-Green--UnknownMed-Lavender-Moore, Jeff--NR--
193 'Oxford Blue'LargeDark-GreenMedialYellowHybrid--Cullerton, Walter--NR--
194 'Oxymoron'SmallBlue/GreenMarginalWhiteSportLight-PurpleJulyHarle, Dennis--NR--
195 'Oyo Como Va'MediumMed-Green--Unknown--Bastille, Jocelyne--NR--
196 'Oyster Crackers'Medium---Unknown--Ziarek, Ken--NR--
197 'Oz'LargeMed-GreenMarginalWhiteSportPale-Lavender-Malloy, Alex--NR--
198 'Ozaki Special'----Duplicate--Duplicate Name--NR--
199 'Oze'MiniatureMed-GreenMarginalYellowUnknownNear-WhiteAugustUnknown--NR--
200 'Oze Shirobana Mizu'MediumMed-Green--SportLight-PurpleAugust to OctoberUnknown--NR--
201 'Oze-maruba-shirobana'----Unknown--Unknown--NR--
202 'Ozzfest'MediumMed-GreenStreakedWhiteSportNear-WhiteJulyZilis, Mark--NR--

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