To identify potentially hallucinogenic mushrooms, dung-associated mushrooms collected from Qingtiangang, Yangmingshan National Park were subjected to a detailed morphological investigation and phylogentic analysis. The investigation identified four taxa: a recorded species ("Panaeolus antillarum"); a new combination ("Conocybe nitrophila"); and two new species ("Psilocybe angulospora", "Protostropharia ovalispora"). Morphological and molecular characteristics of the collected mushrooms were compared with allied fungal taxa.