schoenoplectus genus -- sedge family
hardstem bulrush (Schoenoplectus acutus) -- in August -- Hutton Lake National Wildlife Refuge, Albany County, southern Wyoming
common threesquare (Schoenoplectus pungens) -- in August -- Arapaho Bend, Fort Collins Natural Area, CO
softstem bulrush (Schoenoplectus tabernaemontani) -- in July -- McMurry, a Fort Collins Natural Area, Larimer County, CO
softstem bulrush (Schoenoplectus tabernaemontani) -- in August -- Ramsay-Shockey Open Space, Larimer County, CO