P. polymorpha may refer to:
Pareledone polymorpha, a cephalopod mollusc Parmelia polymorpha, a strap lichen Pecopteris polymorpha, a prehistoric plant Peperomia polymorpha, a radiator plant Persicaria polymorpha, a buckwheat native to Russia Peyssonnelia polymorpha, a red alga Pheidole polymorpha, a fungus-growing ant Pinanga polymorpha, a palm tree Plecoptera polymorpha, an owlet moth Plumatella polymorpha, a freshwater bryozoan Polymixis polymorpha, an owlet moth Potentilla polymorpha, a herbaceous plant Preussia polymorpha, a saprobic fungus Pseudopalaina polymorpha, a land snail Psychotria polymorpha, an understorey tree