Plants Oe to Pa
Oenothera laciniata EveningPrimrose Various
Oenothera missouriensis Ozark Sundrop Missouri EveningPrimrose Various
Oenothera odorata EveningPrimrose Originated in 8230 Chile Flower
Oenothera speciosa Showy EveningPrimrose Originated in 8230
Oenothera taraxacifolia EveningPrimrose Originated in 8230 Chile Various
Oenothera tetragona Common Sundrop Various
Oenothera triloba Stemless EveningPrimrose Flower
Olea europea Olive Originated in 8230 Mediterranean Tree
Olearia argophylla Daisy Bush Musk Tree Various
Olearia fragrantissima Daisy Bush Musk Tree Various
Olearia ilicifolia Daisy Bush Musk Tree Various
Olearia moschata Daisy Bush Musk Tree Various
Olearia odorata Daisy Bush Musk Tree Various
Omphalodes cappadocica Navelwort Various
Omphalodes linifolia Whiteflower Navelwort Various
Oncidium incurvum Epiphytic Orchid Originated in 8230 Mexico Various
Oncidium ornithorhynchum Epiphytic Orchid Various
Ononis spinosa Spiny Restharrow Various
Onopordum acanthium Scotch Cotton Thistle Silver Thistle Flower
Onosma echioides Onosma Originated in 8230 Europe Various
Onosma tauricum Golden Drop Flower
Operculina turpethum Turpeth Indian Jalap Various
Ophiopogon japonicus Dwarf Lilyturf Dwarf Mondo Grass Flower
Opulaster malvaceus Originated in 8230 Northwest US Various
Opuntia engelmanii Pricklypear Cactus Various
Opuntia engelmannii Originated in 8230 MexicoArizonaTexas Shrub
Opuntia ficusindica Tuna Cactus Barbary Fig Pricklypear Cactus Originated in 8230
Opuntia haematocarpa Originated in 8230 South America Tree
Opuntia herrfeldtii Originated in 8230 central Mexico Shrub
Opuntia humifusa Pricklypear Various
Opuntia leucotricha Arborescent Pricklypear Duraznillo Pricklypear Cactus
Opuntia megacantha Pricklypear Cactus Various
Opuntia megacarpa Originated in 8230 Mexico Shrub
Opuntia occidentalis Pricklypear Cactus Various
Opuntia opuntia Originated in 8230 southern US Shrub
Opuntia polyacantha PricklyPear Cactus Originated in 8230
Opuntia rafinesquei DevilS Tongue Originated in 8230
Opuntia streptacantha Tuna Cardona Originated in 8230 Mexico Tree
Opuntia undulata Originated in 8230 Mexico Tree
Orchis coriophora Terrestrial Orchid Originated in 8230
Orchis fusca Terrestrial Orchid Various
Orchis hircina Lizard Orchis Originated in 8230 Europe Various
Orchis hirsina Goat Orchid Originated in 8230 EuropeNorth Africa Various
Orchis maculata Spotted Orchis Originated in 8230 EuropeAsia minor Various
Orchis mascula Purple Orchid Salep Purple Orchis Originated in 8230
Orchis morio Green Wing Orchis Various
Orchis pyramidalis Terrestrial Orchid Various
Orchis spectabilis Showy Orchid Various
Origanum dictamnus Dittany Of Crete Marjoram Flower
Origanum libanoticum Originated in 8230 Lebanon Various
Origanum majorana Sweet Majoram Knotted Majoram Herb
Origanum marjorana Sweet Marjoram Originated in 8230 North Africa Various
Origanum maru Egyptian Marjoram Originated in 8230 SyriaArabiaMastic Various
Origanum microphyllum Eau De Cologne Plant Herb
Origanum onites Pot Marjoram Herb
Origanum pulchrum Marjoram Originated in 8230 Greece Flower
Origanum sipyleum Originated in 8230 Levant Various
Origanum tournefortii Marjoram Originated in 8230 Greece Flower
Origanum vulgare Oregano Wild Majorum Organy Pot Majorum Originated in 8230
Origanum x majoricum Hardy Majoram Italian Oregano Herb
Ornithogalum arabicum Originated in 8230 Mediterranean Various
Ornithogalum umbellatum Sleepydick Star Of Bethlehem Various
Oroxylum indicum Originated in 8230 Thailand Various
Orthocarpus erianthus Popcorn Flower Originated in 8230 California Various
Orthocarpus purpurascens OwlS Clover Escobita Various
Orthocarpus versicolor White OwlS Clover Originated in 8230 California Various
Orthosiphon aristata Java Tea Various
Osmanthus americana Devilwood Various
Osmanthus aquifolium Sweet Olive Various
Osmanthus fragrans Sweet Osmanthus Sweet Olive Tea Olive Various
Osmanthus heterophyllus Variegatus Variegated False Holly Shrub
Osmaronia cerasiformis OsoBerry Various
Osmorhiza longistylis Smoother Sweet Cicely Various
Osmunda cinnamomea Buckhorn Cinnamon Fern Fiddleheads
Osmunda claytoniana Interrupted Fern Fern
Osmunda regalis Royal Fern Fern
Osteospermum Buttermilk Various
Osteospermum fruticosum African Queen
Osteospermum hyoseroides Various
Ostrya virginiana Hop Hornbeam Ironwood Tree
Owenia acidula Desert Plum Australian Native Nectarine
Oxalis acetoscella Wood Sorrel Various
Oxalis enneaphylla Originated in 8230
Oxalis Grand Duchess Lavender Shamrock Groundcover
Oxyanthus isthmia Needle Flower Various
Oxydendrum arboreum Sourwood Sorrel Tree Tree
Oxypetalum caeruleum Southern Star Various
Oxyria digyna Alpine Mountain Sorrel Various
Pachyrhizus erosus Yam Bean Jicama Various
Pachyrhizus tuberosus Ajipo Jicama Yam Bean Various
Pachysandra procumbens Allegheny Spurge
Pachysandra terminalis Japanese Pachysandra Groundcover
Paeonia Anthony Dessert Peony Shrub
Paeonia brownii Wild Peony Originated in 8230
Paeonia Couronne dOr Peony Shrub
Paeonia Jessie Shaylor Peony Shrub
Paeonia John M Good Peony Shrub
Paeonia lactiflora Chinese Peony White Peony
Paeonia Marie Jacquin Peony Shrub
Paeonia mlokosewitchii Caucasian Peony Various
Paeonia Nell Shaylor Peony Shrub
Paeonia officinalis Peony Various
Paeonia President Wilson Peony Shrub
Paeonia suffruticosa Japanese Tree Peony Various
Paeonia tenuifolia Fernleaf Peony Various
Paeonia whittmanniana Peony Shrub
Panax ginseng Chinese Ginseng Ren Shen Various
Panax notoginseng San Qi Various
Panax pseudoginseng Ginseng Flower
Panax quinquefolium American Ginseng Various
Panax quinquefolius American Ginseng Flower
Panax schinseng Asiatic Ginseng Various
Pancratium illyricum Originated in 8230 Mediterranean Various