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Scientific Name Common Name(s) Plant Category Image
Oenothera biennis Evening primrose Perennials, Wildflowers
Oenothera fruticosa Sundrops Native Plants, Perennials
Oenothera speciosa Showy evening primrose Perennials
Oenothera tetragona Sundrops Perennials, Wildflowers
Oxalis Clover, Good luck plant, Lucky clover, Oxalis, Shamrock, Wood-sorrel Annuals, Perennials, Poisonous Plants, Summer Bulbs, Wildflowers
Oxalis corniculata L. Creeping woodsorrel Annuals, Perennials, Wildflowers
Oxalis crassipes Oxalis Perennials, Poisonous Plants
Oxalis stricta L. Common yellow woodsorrel, Lemon clover, Pickle plant, Sourgrass, Yellow woodsorrel Annuals, Perennials, Wildflowers
Oxypetalum caeruleum = Tweedia caerulea Tweedia Perennials
Paeonia hybrids Peony Perennials
Pandanus tectorius Pandan, Screw pine Perennials, Trees
Panicum virgatum Panic grass, Switch grass Native Plants, Ornamental Grass, Perennials
Papaver somniferum Opium poppy, common poppy Perennials, Poisonous Plants
Papaver spp. Poppy Perennials
Passiflora incarnata Maypops, Passion flower Perennials, Vines, Wildflowers
Penstemon canescens Beard-tongue, Penstemon Perennials, Wildflowers
Penstemon spp. Bearded tongue Perennials
Peperomia argyreia Watermelon peperomia Groundcover, Perennials
Peperomia caperata Emerald ripple peperomia, Emerald ripple pepper, Ivy-leaf peperomia Groundcover, Perennials
Perovskia atriplicifolia Russian sage Perennials, Shrubs
Phlox nivalis Pine phlox, Trailing phlox Native Plants, Perennials
Phlox paniculata Fall phlox, Garden phlox Perennials, Wildflowers
Phlox subulata Moss phlox, Moss pink, Moss-pink, Thrift Groundcover, Native Plants, Perennials, Wildflowers
Physostegia virginiana False Dragon Head, Obedient plant Native Plants, Perennials, Wildflowers
Phytolacca americana Poke, Pokeweed Native Plants, Perennials, Poisonous Plants, Wildflowers