In this book the author seeks first, to find proves for reality, rhizome, nature and history concepts of postmodern ecocritical approach of Serpill Oppermann in Jane Urquhart s' The Underpainter and A Map of Glass. Urquhart tends to represent reality due to language and nature aspects effectively. In a world influenced by decentralization, discontinuity and fragmentation at cultural levels and interactions with ecosystem, it is hard to ignore the concept of postmodern reality. In both above mentioned novels of Urquhart, what the characters do and what the situations make, have a rhizomic role in nature and are multidimensional affairs. Parallel role of nature and language in The Underpainter and A Map of Glass obviously influence character s' lives and decisions-making about their lives. As skepticism attitude of postmodernism toward history, Urquhart explores that there are dark side of history and also, history can be defined in relation to nature.