Schoenoplectus
Inflorescence apparently lateral. Spikelets sessile
Styles mostly 3-fid. Culms usually more than 2 mm wide, sharply 3-angled
Leaf blades absent, plants 50–100 cm high. Culms yellow-green. Perianth bristles as long as or longer than the nut. Spikelet 7–10 mm long. Glumes acute. Nut plano-convex to trigonous. Widespread. Damp places. Uncommon Schoenoplectus mucronatus
Leaf blades to 20 cm long, plants 20–60 cm high. Culms grey-green. Perianth bristles as long as or shorter than the nut. Spikelets 6–10 mm long. Glumes retuse. Nut plano-convex. Uncommon. Damp places Schoenoplectus pungens