Pachysandra, Genus
Panicum, Genus
Papaver, Genus
Papaveraceae, Family
Papillionaceae, Family
– synoniem van Fabaceae, Family
Parapholis, Genus
Parentucellia, Genus
Parietaria, Genus
Paris, Genus
Parnassia, Genus
Parnassiaceae, Family
Parthenocissus, Genus
Pastinaca, Genus
Paulownia, Genus
Paulowniaceae, Family
Pedicularis, Genus
Pentaglottis, Genus
Persicaria, Genus
Petasites, Genus
Petrorhagia, Genus
Petroselinum, Genus
Peucedanum, Genus
Phacelia, Genus
Phalaris, Genus
Phaseolus, Genus
Phegopteris, Genus
Philadelphus, Genus
Phleum, Genus
Phragmites, Genus
Phrymaceae, Family
Physalis, Genus
Phyteuma, Genus
Phytolacca, Genus
Phytolaccaceae, Family
Picea, Genus
Picris, Genus
Pilularia, Genus
Pimpinella, Genus
Pinaceae, Family
Pinguicula, Genus
Pinus, Genus
Piperales, Order
Pistia, Genus
Plantae, Kingdom
Plantaginaceae, Family
Plantago, Genus
Platanaceae, Family
Platanthera, Genus
Platanus, Genus
Plumbaginaceae, Family
Poa, Genus
Poaceae, Family
Poales, Order
Polemoniaceae, Family
Polemonium, Genus
Polycarpon, Genus
Polycnemum arvense, Family
– synoniem van Amaranthaceae, Family
Polycnemum majus, Family
– synoniem van Amaranthaceae, Family
Polygala, Genus
Polygalaceae, Family
Polygonaceae, Family
Polygonatum, Genus
Polygonum, Genus
Polypodiaceae, Family
Polypodium, Genus
Polypogon, Genus
Polystichum, Genus
Pontederia, Genus
Pontederiaceae, Family
Populus, Genus
Portulaca, Genus
Portulacaceae, Family
Potamogeton, Genus
Potamogetonaceae, Family
Potentilla, Genus
Pratia, Genus
Primula, Genus
Primulaceae, Family
Proteales, Order
Prunella, Genus
Prunus, Genus
Pseudofumaria, Genus
Pseudorchis, Genus
Pseudosasa, Genus
Pseudotsuga, Genus
Psium, Genus
Pteridaceae, Family
Pteridium, Genus
Pteris, Genus
Pterocarya, Genus
Pteropsida, Class
Puccinellia, Genus
Pulicaria, Genus
Pulmonaria, Genus
Pulsatilla, Genus
Pyracantha, Genus
Pyrola, Genus
Pyrolaceae, Family
– synoniem van Ericaceae, Family
Pyrus, Genus