Photo credit: Robert H. Mohlenbrock @ USDA-NRCS PLANTS Database / USDA SCS. 1989. Midwest wetland flora: Field office illustrated guide to plant species. Midwest National Technical Center, Lincoln.
Erect clumps of triangular stems form from short rhizomes. Drooping spikelets impart a bottlebrush effect. Found along ponds, lakes, in wetlands and wet meadows, providing food and cover for water fowl.
For more information on this plant, visit the USDA PLANTS Database: http://plants.usda.gov/java/profile?symbol=CACO8