| 1228 | Oenothera elata | yellow/fades red-orange 40-180cm 35 | G | 
      
                                                                      | 1229 | Oenothera elata ssp hookeri | yellow 40-180cm 16 | G | 
      
                                                                      | 1229 | Oenothera elata ssp hookeri | yellow 40-180cm 16 | G | 
      
                                                                      | 1230 | Oenothera filiformis | white fades pink 50-400cm 121 | G | 
      
                                                                      | 1230 | Oenothera filiformis | white fades pink 50-400cm 121 | G | 
      
                                                                      | 1231 | Oenothera lavandulifolia | yellow fades pale pink-orange 4-20cm 69 | G | 
      
                                                                      | 1231 | Oenothera lavandulifolia | yellow fades pale pink-orange 4-20cm 69 | G | 
      
                                                                      | 1232 | Oenothera macrocarpa | yellow 4-40cm 75 | G | 
      
                                                                      | 1232 | Oenothera macrocarpa | yellow 4-40cm 75 | G | 
      
                                                                      | 1233 | Oenothera macrocarpa ssp fremontii | yellow-fades orange flr/grey-green lvs 4-40cm 155 | G | 
      
                                                                      | 1233 | Oenothera macrocarpa ssp fremontii | yellow-fades orange flr/grey-green lvs 4-40cm 155 | G | 
      
                                                                      | 3216 | Olsynium douglasii | pink 20cm Oregon: Friend 732m 135 | W | 
      
                                                                      | 3217 | Olsynium douglasii | purple Canada: Langford, BC 105 | W | 
      
                                                                      | 3217 | Olsynium douglasii | purple Canada: Langford, BC 105 | W | 
      
                                                                      | 1234 | Olsynium junceum ssp depauperatum | white/purple eye & striped reverse 30cm 56 | G | 
      
                                                                      | 1234 | Olsynium junceum ssp depauperatum | white/purple eye & striped reverse 30cm 56 | G | 
      
                                                                      | 1235 | Ononis spinosa | pink-mauve 30-60cm 48 | G | 
      
                                                                      | 1235 | Ononis spinosa | pink-mauve 30-60cm 48 | G | 
      
                                                                      | 1236 | Onosma cinerea | cream-yellow flr/grey-green hairy lvs 25-30cm 74 | G | 
      
                                                                      | 1236 | Onosma cinerea | cream-yellow flr/grey-green hairy lvs 25-30cm 74 | G | 
      
                                                                      | 1237 | Onosma echioides | pale yellow 15-30cm 155 | G | 
      
                                                                      | 1237 | Onosma echioides | pale yellow 15-30cm 155 | G | 
      
                                                                      | 1238 | Ophiopogon planiscapus 'Nigrescens' | lavender-white/purple-black lvs & frt 15-30cm 4 165 | G | 
      
                                                                      | 1238 | Ophiopogon planiscapus 'Nigrescens' | lavender-white/purple-black lvs & frt 15-30cm 4 165 | G | 
      
                                                                      | 3218 | Opuntia cymochila | yellow 20cm Colorado: Platteville, Weld Co 35 | W | 
      
                                                                      | 3218 | Opuntia cymochila | yellow 20cm Colorado: Platteville, Weld Co 35 | W | 
      
                                                                      | 1239 | Orbexilum psoralioides 'Nash' | lavender 45cm 94 | G | 
      
                                                                      | 1239 | Orbexilum psoralioides 'Nash' | lavender 45cm 94 | G | 
      
                                                                      | 1240 | Oreocarya flava | yellow flr/grey-green hairy lvs 13-40cm 155 | G | 
      
                                                                      | 1240 | Oreocarya flava | yellow flr/grey-green hairy lvs 13-40cm 155 | G | 
      
                                                                      | 1241 | Orlaya grandiflora | white 60-90cm 22 37 | G | 
      
                                                                      | 1241 | Orlaya grandiflora | white 60-90cm 22 37 | G | 
      
                                                                      | 1242 | Ornithogalum candicans | white to 120cm 21 | G | 
      
                                                                      | 1242 | Ornithogalum candicans | white to 120cm 21 | G | 
      
                                                                      | 1243 | Ornithogalum magnum | white 30-60cm 124 | G | 
      
                                                                      | 1243 | Ornithogalum magnum | white 30-60cm 124 | G | 
      
                                                                      | 1244 | Ornithogalum princeps | pale green-cream 60-90cm 55 | G | 
      
                                                                      | 1244 | Ornithogalum princeps | pale green-cream 60-90cm 55 | G | 
      
                                                                      | 1245 | Ornithogalum viridiflorum | pale yellow-green to 1m 55 156 | G | 
      
                                                                      | 1245 | Ornithogalum viridiflorum | pale yellow-green to 1m 55 156 | G | 
      
                                                                      | 1246 | Orostachys minuta | reddish/purple spotted 2-6cm 155 | G | 
      
                                                                      | 1246 | Orostachys minuta | reddish/purple spotted 2-6cm 155 | G | 
      
                                                                      | 1247 | Orychophragmus violaceus | deep purple/lavender/white 15-60cm 142 | G | 
      
                                                                      | 1247 | Orychophragmus violaceus | deep purple/lavender/white 15-60cm 142 | G | 
      
                                                                      | 1248 | Osmorhiza longistylis | white 30-90cm 116 | G | 
      
                                                                      | 1248 | Osmorhiza longistylis | white 30-90cm 116 | G | 
      
                                                                      | 1249 | Ourisia microphylla | pink/white 5-10cm 13 | G | 
      
                                                                      | 1250 | Oxypetalum coeruleum | sky blue 15-100cm 113 125 | G | 
      
                                                                      | 1250 | Oxypetalum coeruleum | sky blue 15-100cm 113 125 | G | 
      
                                                                      | 1251 | Oxytropis besseyi | reddish purple flr/silvery hairy lvs 14-19cm 162 | G |