-(Ericaceae from Parque Nacional do Itatiaia, Rio de Janeiro State, Brazil). This work presents the floristic survey of Ericaceae from Parque Nacional do Itatiaia, located in the States of Rio de Janeiro and Minas Gerais, Southeastern Brazil. After fieldwork, bibliographic revision, and analysis of herbarium material, 14 species were identified in three genera: Agarista (4), Gaultheria (5), and Gaylussacia (5). Identification key, descriptions, illustrations, and comments on geographical distribution are presented.