'Orange Beauty' Daylily 'Orange' Black-eyed Susan Vine
Orange Bottlebrush Ginger (spp.) Orange Bottlebrush Ginger 'Aurantiacum'
Orange Clock Vine Orange Colored Sedge (spp.)
Orange Colored Sedge 'Toffee Twist' Orange Coneflower 'Goldsturm'
'Orange Gnome' Arkwright's Campion 'Orange Jacket' French Marigold
'Orange Kewpie' Plume Celosia 'Orange King' Common Zinnia
Orange Larkspur (spp.) Orange Larkspur 'Laurin'
Orange Muatucana Orange River Lily
Orange Sneezeweed 'Orange Star' Mexican Zinnia
Orange Star 'Minor' Orange Stonecrop (spp.)
Orange Stonecrop 'Tricolor' Orange Stonecrop Variegated
Orange Sunflower (spp.) Orange Sunflower 'Ballerina'
Orange Sunflower 'Summer Sun' Orange Trumpet
'Orangeade' Guzmania 'Orangemint' Peppermint
Orbea 'Orbit Hot Pink' Zonal Geranium
Orchid 'Indigo Sue' Orchid 'Jimminey Cricket'
'Orchid Primrose' Orchid Primula Orchid Primula (spp.)
Orchid Primula 'Orchid Primrose' Orchid 'Rainforest'
Orchid 'Yellow Bird' Orchid, Black-Lipped 'Burfordiense'
Orchid, Butterfly (spp.) Orchid, Butterfly 'Blandans Kaleidoscope'
Orchid, Butterfly 'Mendenhall' Orchid, Butterfly 'Paula Lawrence'
Orchid, Butterfly 'York' Orchid, Chinese Ground
Orchid, Cradle Orchid, Cymbidium (spp.)
Orchid, Cymbidium 'Mary Bea' Orchid, Fringed
Orchid, Hardy Orchid, Ladyslipper
Orchid, Large Whorled Pogonia Orchid, Moth (spp.)
Orchid, Moth 'Blandans Kaleidoscope' Orchid, Moth 'Mendenhall'
Orchid, Moth 'Paula Lawrence' Orchid, Moth 'York'
Orchid, Nun's Hooded Orchid, Peacock
Orchid, Ragged Orchid, Slipper 'Agincourt'
Orchid, Tuberous Orchid, Vanda
Orchid: Brassolaeliocattleya 'Mendenhall' Orchid: cordigera
Orchid: ignea Orchid: Laeliocattleya 'Gold Digger'
Orchid: Laeliocattleya 'Summer Spectacular' Orchid: mackaii
Orchid: maxima Orchid: prismatocarpa
Orchid: radiata Orchid: tricolor
Orchid: tripetaloides Orchid: uniflora
Orchid: uniflora Orcutt Aster
Oregano (spp.) Oregano Golden
Oregano 'Thumbles' Oregano Variegated
Oregano, Cuban (spp.) Oregano, Ornamental 'Herrenhausen'
Oregano, Ornamental 'Rosenkuppel' Oregano, Roundleaf
Oregon Fleabane 'Dignity' Oregon Fleabane 'Prosperity'
Oregon Lily Organ Pipe Cactus: thurberi