| Id. | Group | Links |
| 265 | Paeoniaceae | |
| 266 | Palladium | |
| 13 | Papaveraceae | |
| 267 | Paramyxoviridae | |
| 126 | Parmeliaceae | |
| 268 | Passifloraceae | |
| 205 | Pasteurellaceae | |
| 269 | Pectinidae | |
| 199 | Pedaliaceae | |
| 270 | Pediculidae | |
| 275 | Phallaceae | |
| 107 | Phasianidae hasianidae | |
| 35 | Phosphorus | |
| 277 | Physaliidae | |
| 278 | Physeteridae | |
| 191 | Physical Radiation | |
| 273 | Phytolaccaceae | |
| 287 | Picornaviridae | |
| 2 | Pinaceae | |
| 279 | Piperaceae | |
| 128 | Pirolaceae | |
| 281 | Plantaginaceae | |
| 347 | Platanaceae | |
| 282 | Platinum | |
| 283 | Plumbaginaceae | |
| 284 | Plumbum | |
| 207 | Polemoniaceae | |
| 288 | Polygalaceae | |
| 180 | Polygonaceae | |
| 289 | Polypodiaceae | |
| 290 | Polyporaceae | |
| 291 | Polytrichaceae | |
| 168 | Pontederiaceae | |
| 334 | Poxviridae | |
| 44 | Primulaceae | |
| 12 | Products of the Cell Metabolism and Hormons | |
| 293 | Pseudomonadaceae | |
| 368 | Psittacidae | |
| 140 | Pteriidae | |
| 295 | Pulicidae | |
| 296 | Punicaceae | |
| 159 | Pyroglyphideae | |
| 309 | Pythiaceae | |