Plants
Oak leaved hydrangea 'Snowflake'Hydrangea quercifolia 'Snowflake'
Oakleaf hydrangeaHydrangea quercifolia
Obedient Plant 'Summersnow'Physostegia virginiana 'Summersnow'Obedient-plant Physostegia virginiana
Ocimum basilicum 'African Blue' Ocimum basilicum 'African Blue'
Ocinum basilicum 'Genovese Gigante'Ocinum basilicum 'Genovese Gigante'
Odontioda orchid 'Le Hocq'Odontioda 'Le Hocq'-
Odontioda orchid 'Lilly Menuet'Odontioda 'Lilly Menuet'
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Odontocidium orchid 'Big Mac Saragosa'Odontocidium 'Big Mac Saragosa'
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Odontocidium orchid 'Hansueli isler'Odontocidium 'Hansueli isler'
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Odontocidium orchid 'Tiger Crow' - 'Golden Girl'Odontocidium 'Tiger Crow' - 'Golden Girl'
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Odontocidium orchid 'Tiger Hambuhren'Odontocidium 'Tiger Hambuhren'
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Odontoglossum orchidOdontoglossum cirrhosum
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Odontonia orchid 'Oxbow'Odontonia Debutante 'Oxbow'
Oenothera fruticosa 'Fyrverkeri'Oenothera fruticosa 'Fyrverkeri'
Oenothera MacrocarpaOenothera Macrocarpa
Oenothera Speciosa 'Siskiyou'Oenothera Speciosa 'Siskiyou'
okra
Old Man of Mexico CactusCephalocereus senilis
OleanderNerium oleander
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Oleaster 'Quicksilver'Elaeagnus angustifolia 'Quicksilver'
Olive treeOlea europaea-
Olws eyes CactusMammillaria parkinsonii
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Olympian MulleinVerbascum olympicum
Omphalodes Cappadocica 'Starry Eyes'Omphalodes Cappadocica 'Starry Eyes'
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Oncidium orchidOncidium ornithorrhyncum
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Oncidium Tsuiku MargueriteOncidium Tsuiku Marguerite
OnionAllium cepa-
OnionAllium carinatum ssp. pulchellum
Onion Red Barron (GS)
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Onion Red Creole
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Onions 'Carmen'Allium cepa 'Carmen'
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Ontario Poplar 'Aurora'Populus candicans 'Aurora'
OPHIOPOGON jaburanOPHIOPOGON jaburan
Ophiopogon planiscapus 'Niger'Ophiopogon planiscapus 'Niger'