The primary objective of this study is to document the vascular plant flora of Glen Canyon National Recreation Area (NRA). The secondary objective is to examine the rare, endemic, and nonnative species composition and distribution in Glen Canyon NRA(GLCA). Species that are rare, endemic, or nonnative often have management implications for land management agencies.

620 Wild Plants of North America describes, in beautiful detail, the characteristic features of 89 families of vascular plants--including trees, shrubs, vines, wildflowers, grasses, sedges, horsetails, and club-mosses--using labeled ink drawings, text and range maps.

In 2006, the National Park Service (NPS) estab-lished a cooperative agreement with the Univer-sity of Wyoming, through the Rocky Mountains Cooperative Ecosystem Studies Unit, to produce a series of technical reports summarizing the vas-cular plant fl ora of each of the 16 national park units of the Northern Colorado Plateau Network (NCPN).