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.