In late 2008 and early 2009, the National Park Service (NPS) published a series of annotated vascular plant species checklists for each of the 16 park units in the Northern Colorado Pla-teau Network (NCPN). These reports were based on reviews of existing herbarium collec-tions and fi eld work associated with rare plant surveys, weed monitoring, vegetation map-ping, and general floristic studies conducted from 2004 to 2007.