Click on a genus name to see a list of species. Select a letter on the left to see more genus entries.

Pachysandra (Spurge )

Paeonia (Peony)

Parrotia (Persian Parrotia )

Parrotiopsis

Parthenocissus (Virginia Creeper)

Passiflora (Passion Flower)

Paulownia

Paxistima (Mountain Lover)

Phellodendron

Philadelphus (Mockorange)

Phillyrea

Photinia (Photinia)

Physocarpus (Ninebark)

Picea (Spruce)

Pieris

Pinus (Pine)

Pistacia (Pistache)

Pittosporum (Australian Laurel)

Platanus (Sycamore )

Platycarya

Platycladus (Oriental Arborvitae)

Podocarpus (Podocarp )

Polygonum (Knotweed )

Polystichum (Wood Fern )

Poncirus (Trifoliate Orange)

Populus (Poplar )

Potentilla (Cinquefoil)

Prumnopitys (Plum-seeded Yew )

Prunus

Pseudolarix (Golden Larch)

Pseudotsuga (Douglas-fir)

Ptelea (Hop Tree )

Pterocarya (Wingnut)

Pterostyrax

Punica (Pomegranate)

Purshia (Bitterbrush)

Pyracantha (Firethorn)

Pyrus (Pear)