Field Marks: The large, spherical female spikes that resemble a mace from the knights of old easily distinguish this sedge.
Habitat: Wet woods, swamps, floodplain woods.
Habit: Perennial herb with thickened rootstocks.
Stems: Erect, smooth, 3-angled, up to 3 feet tall.
Leaves: Elongated, narrow, often longer than the flowering stem, dark green, smooth, up to 1/2 inch broad.
Flowers: Male and female flowers borne in separate spikes; the male flowers in a single narrow spike up to 2 inches long; the female flowers crowded into 1-2 dense, spherical heads resembling a mace from the knights of old, up to 1 1/4 inches in diameter, containing 6-30 perigynia.
Scales: Ovate, rounded but usually with a short mucro at the tip, pale along the edges, about 1/3 as long as the perigynia.
Sepals: 0.
Petals: 0.
Stamens: 3.
Pistils: Enclosed in a perigynium; the perigynium ovoid, smooth or short-hairy, up to 3/4 inch long, ribbed, abruptly contracted into a long beak 2-toothed at the tip.
Fruits: Achenes triangular, smooth.
Notes: Although most specimens are completely smooth, others may have slightly hairy leaves and perigynia. The achenes are eaten by waterfowl.