Five mushrooms sclerotia were identified by FTIR as their adulterant products are prevalent.
Lignosus rhinocerotis was comparable with Poria cocos.
Polyporus umbellatus and Pleurotus tuber-regium were discriminated at 1680–1500 cm−1.
Omphalia lapidescens was different from the others.
FTIR can revealed the dissimilarity of these five mushroom sclerotia.