Summary[edit] Description: English: Cyperus strigosus L. - strawcolored flatsedge. Date: 1989. Source: http://plants.usda.gov/gallery/pubs/cyst_002_php.jpg. Author: Robert H. Mohlenbrock. USDA SCS. 1989. Midwest wetland flora: Field office illustrated guide to plant species. Midwest National Technical Center, Lincoln. Provided by USDA NRCS Wetland Science Institute (WSI).