Leaf blades (2–)3–4.5 mm wide at widest. Perigynia ovate-elliptic, 3–4 × 1.1–1.7 mm, 2.2–2.8(–3) times as long as wide, margin flat, including wing 0.2–0.5 mm wide.

Fruiting early–mid summer. Open floodplain forests, moist to wet grasslands, ditches, stream banks, wet thickets; 20–600 m; Ala., Ark., Ga., Ill., Ind., Kans., Ky., La., Miss., Mo., Ohio, Okla., S.C., Tenn., Tex.; Mexico (Veracruz).