Panaeolina foenisecii – synonym of Panaeolus foenisecii
Panaeolus olivaceus – synonym of Panaeolus fimicola
Paxillus rubicundulus – synonym of Paxillus filamentosus
Peckiella lateritia – synonym of Hypomyces lateritius
Peckiella viridis – synonym of Hypomyces viridis
Peziza praetervisa – synonym of Peziza subviolacea
Phaeogalera oedipus – synonym of Pholiota oedipus
Phaeomarasmius horizontalis – synonym of Psilocybe horizontalis
Phellinus pomaceus – synonym of Phellinus tuberculosus
Phellinus ribis – synonym of Phylloporia ribis
Pholiota carbonaria – synonym of Pholiota highlandensis
Pholiota destruens – synonym of Pholiota populnea
Pholiota graminis – synonym of Pholiota conissans
Pholiota lutaria – synonym of Pholiota conissans
Pholiotina aporos – synonym of Conocybe aporos
Pholiotina arrhenii – synonym of Conocybe arrhenii
Phylloporus rhodoxanthus – synonym of Phylloporus pelletieri
Pisolithus tinctorius – synonym of Pisolithus arhizus
Pleurotellus herbarum – synonym of Crepidotus epibryus
Pluteus atricapillus – synonym of Pluteus cervinus
Pluteus lutescens – synonym of Pluteus romellii
Pluteus plautus – synonym of Pluteus semibulbosus
Podosphaera oxyacanthae – synonym of Xylaria oxyacanthae
Poison Pie[English] – synonym of Hebeloma crustuliniforme
Poria sanguinolentus – synonym of Physisporinus sanguinolentus
Postia caesia – synonym of Oligoporus caesius
Propolis versicolor – synonym of Propolomyces versicolor
Psathyrella hydrophila – synonym of Psathyrella piluliformis
Psathyrella squamosa – synonym of Psathyrella artemisiae
Psathyrella velutina – synonym of Lacrymaria lacrymabunda
Pseudocraterellus sinuosus – synonym of Pseudocraterellus undulatus
Pulcherricium caeruleum – synonym of Terana caerulea
Pustularia catinus – synonym of Tarzetta catinus
Pustularia cupularis – synonym of Tarzetta cupularis