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Scientific Name Common Name(s) Plant Category Image
Opuntia humifusa Eastern prickly pear cactus Native Plants, Perennials
Origanum laevigatum Ornamental oregano Herbs, Perennials
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 amarum Bitter panicgrass, Bitter panicum, Bitter switchgrass , Switchgrass Ornamental Grass, Perennials
Panicum virgatum Panic grass, Switch grass Native Plants, Ornamental Grass, Perennials
Papaver somniferum Opium poppy, common poppy Perennials, Poisonous Plants
Papaver spp. Poppy Perennials
Parthenium integrifolium American feverfew, Wild quinine Perennials, Wildflowers
Passiflora incarnata Maypop, Passion flower Edible Plants, Native Plants, Perennials, Vines, Wildflowers
Passiflora lutea Native Plants, Perennials, Vines
Penstemon canescens Beard-tongue, Penstemon Herbs, Native Plants, Perennials, Wildflowers
Penstemon digitalis Foxglove beardtongue, White beardtongue Native Plants, Perennials, Wildflowers
Penstemon laevigatus Eastern beardtongue, Eastern smooth beardtongue, Smooth beardtongue Herbs, Native Plants, Perennials, Wildflowers
Penstemon smallii Beard tongue Herbs, Native Plants, 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 carolina Carolina phlox, Summer phlox, Thickleaf phlox Herbs, Native Plants, Perennials, Wildflowers