Bolboschoenus fluviatilis (Torr.) Soják
Family: Cyperaceae
river bulrush
Bolboschoenus fluviatilis image
Derek Anderson  
Etymology: Bolboschoenus: Greek bolbos, "swelling or bulb;" schoenus, "rush," from the supposed difference from the genus Schoenus in having bulbous tubers
Plants: erect, perennial, to 7' tall, semi-aquatic, emergent sedge, nutlets 3-angled, beaked, 6 barbed bristles; stems 1/3"-3/4" thick, triangular, many leaves, sturdy, rot-resistant; heavy, tuber making rhizomes
Leaves: 3-ranked to 1/2" wide, M-shaped in X-section
Flowers: spikelets 1/2-1" long with spiral flowers covered in brown scales
Fruits: nutlets
Habitat: wet; shores, marshes to water > 3' deep; in sediment soil
Conservation Status: Native