Pachyphragma

Pachysandra

Packera

Paeonia

Panicum

Papaver

Paradisea

Paronychia

Parrotia

Parthenium

Parthenocissus

Passiflora

Patrinia

Paulownia

Pelargonium

Peltaria

Pennisetum

Penstemon

Periploca

Perovskia

Persicaria

Petasites

Petrorhagia

Petroselinum

Peucedanum

Phalaris

Phellodendron

Philadelphus

Phillyrea

Phlomis

Phlox

Phormium

Photinia

Phuopsis

Phylica

Phyllanthus

Phyllostachys

Physalis

Physocarpus

Physostegia

Phyteuma

Picea

Picrasma

Pieris

Pileostegia

Pilgerodendron

Pimpinella

Pinus

Pitavia

Pittosporum

Plagianthus

Planera

Plantago

Platanus

Platycladus

Pleioblastus

Pleione

Pleurospermum

Poa

Podocarpus

Podophyllum

Polemonium

Poliothyrsis

Polygonatum

Polygonum

Polypodium

Polystichum

Pomaderris

Poncirus

Populus

Potentilla

Primula

Prostanthera

Prunella

Prunus

Pseudocydonia

Pseudotaxus

Pseudotsuga

Pseudowintera

Psoralea

Pterocarya

Pterostyrax

Pulmonaria

Pulsatilla

Punica

Pycnanthemum

Pyracantha

Pyrus