Flowers by Name, and Color location: O - Q

Oenothera biennis, yellow
Oenothera speciosa, pink
Old Man's Beard, white
Onion,Wild, white
Opuntia sp., yellow
Orchid - see Ladies'
     Tresses
Oxalis corniculata, yellow
Oxalis sp., pink
Oxalis violacae, violet
Palafoxia, pink
Palafoxia callosa, pink
Pale Corydalis, yellow
Pampas Grass, white
Parsley Hawthorn, white
Partridge Berry, white
Partridge Pea, yellow
Passiflora incarnata,
    violet
Passiflora lutea, green
Passion Flower, violet
Passion Flower, Yellow,
    green
Pawpaw, red
Pea, Butterfly, violet
Peach Tree, pink
Pedicularis canadensis,
    yellow
Pencil Flower, yellow
Pennsylvania Smartweed,
    pink
Persimmon Tree, yellow
Petunia, Hairy, violet
Phacelia, Hairy, blue
Phacelia hirsuta, blue
Phlox, Blue,pink
Phlox, Blue, violet

Phlox divaricata, pink
Phlox divaricata, violet
Phytolacca americana, white
Pie Maker, yellow
Pine Woods Lily, purple
Pinkweed, pink
Plantago lanceolata, white
Plantain, English, white
Plaintain, Indian, white
Plantainleaf pussytoes,
    white
Podophyllum peltatum, white
Poison Ivy, green
Pokeweed, white
Polygala sp., white
Polygonum pensylvanicum,
    pink
Poppy Mallow, pink
Potato Dandelion, yellow
Prickly Pear, yellow
Primrose, Evening, yellow
Primrose, Showy Evening,
     pink
Privet, Common, white
Prunella vulgaris, violet
Prunus serotina, white
Ptilimnium nuttallii, white
Purple Coneflower, magenta
Pussy's toes, white
Pycnanthemum sp., white
Pyrrhopappus carolinianus,
     yellow
Pyrus augustifolia, pink
Queen Anne's Lace, white