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Scientific Name Common Name(s) Plant Category Image
Platanus x acerfolia London plane tree, London planetree Trees
Platycerium bifurcatum Elkhorn fern, Staghorn fern Ferns
Platycladus orientalis Oriental arborvitae Shrubs, Trees
Platycodon grandiflorus Balloon flower Perennials
Plectranthus argentatus Silver plectranthus, Silver spur flower Annuals
Plectranthus forsteri 'Marginatus' Swedish ivy Annuals, Groundcover, Perennials
Pleioblastus auricoma Compact golden striped bamboo, Kanuro zasa Ornamental Grass
Pleiodlastus variegatus Compact white striped bamboo Ornamental Grass
Plerandra elegantissima False Aralia Shrubs, Trees
Plumbago auriculata Cape leadwort Annuals, Poisonous Plants, Vines
Plumbago auriculata = P. capensis Cape leadwort Poisonous Plants, Shrubs
Plumbago spp. Leadwort, plumbago Poisonous Plants
Poa annua L. Annual bluegrass Herbs
Podocarpus macrophyllus Buddist pine, Fern pine, Podocarpus, Shrubby yew podocarpus, Southern yew, Yew pine, Yew plum pine Edible Plants, Poisonous Plants, Shrubs, Trees
Podocarpus macrophyllus var. maki Chinese Podocarpus, Shrubby podocarpus Poisonous Plants, Shrubs
Podophyllum peltatum May-apple, Mayapple, mandrake Native Plants, Perennials, Poisonous Plants, Wildflowers
Pogonia ophioglossoides Rose crested orchid, Rose pogonia Wildflowers
Polemonium reptans Greek valerian, Jacob's ladder Native Plants, Perennials
Polianthes spp. Polyanthus lily, Tuberose Summer Bulbs
Poliothyrsis sinensis Poliothyrsis Trees
Polygala curtissii Curtiss milkwort, Polygala Wildflowers
Polygala lutea Orange milkwort, Yellow milkwort Wildflowers
Polygonatum biflorum Solomon's seal Native Plants, Perennials, Poisonous Plants, Wildflowers
Polygonatum humile Dwarf Solomon's seal Groundcover, Poisonous Plants
Polygonatum spp. Solomon's seal Poisonous Plants
Polygonum aubertii Fleece vine, Silver lace vine Vines
Polygonum hydropiper Smartweed, Water-pepper Wildflowers
Polygonum orientale Garden gate, Kiss-me over-the garden gate Annuals
Polygonum pennsylvanicum Pennsylvania smartweed, Pink knotweed Wildflowers
Polygonum spp. Knotweed Perennials
Polypodium aureum Cabbage palm fern, Gold foot fern, Golden polypody, Hare foot fern, Rabbits foot fern Ferns
Polypodium polypodioides Resurrection fern Ferns
Polyscias balfouriana Aralia Balfour Shrubs, Trees
Polyscias fruiticosa Ming aralia Shrubs, Trees
Polyscias spp. Aralia Poisonous Plants
Polystichum acrostichoides Christmas fern Ferns, Native Plants
Polystichum braunii Braum's holly fern Ferns
Polystichum polyblepharum Korean tassel fern Ferns
Polystichum polylepharum Bristle fern, Japanese tassel fern, Tassel fern Ferns
Polystichum setiferum Hedge fern, Soft shield fern Ferns
Polystichum tsus-simense Korean rock fern, Tsu-sima holly fern Ferns
Poncirus trifoliata Trifoliate orange Poisonous Plants
Pontederia cordata Pickerel weed, Pickerelweed Herbs, Native Plants, Perennials, Water Garden, Wildflowers
Pontederia cordata alba White pickerel weed Wildflowers
Populus deltoides Common cottonwood, Cottonwood, Eastern cottonwood, Eastern poplar, Poplar Shrubs, Trees
Populus nigra Black poplar, Lombardy poplar Trees
Porteranthus trifoliatus American ipecac, Bowman's root, Mountain indian physic Perennials, Wildflowers
Portulaca grandiflora Moss rose, Portulaca, Purslane Annuals
Portulaca oleracea Common purslane, Little hog weed, Moss rose, Pigweed, Purslane Annuals, Edible Plants
Potentilla canadensis Dwarf cinquefoil Wildflowers