Sedges are important components of Maine's biodiversity and natural heritage. Over 25% of the sedge species in Maine are of conservation concern, yet sedges are ubiquitous in many habitats across the landscape. Proper identification of sedge species is an essential component of ecological studies such as wetland delineations, wetland functional assessments, natural resource inventories, site suitability assessments, ecological characterizations, land conservation value evaluations, and rare species surveys and habitat assessments. Sedges of Maine is a fully-illustrated guide to all species, subspecies, and extant hybrids in the Cyperaceae family that occur in Maine.