Flora of North America species comparison

20–100 cm;

vegetative culms with few leaves clustered at apex.

5–35 cm.

sheath summits U-shaped;

distal ligules 2.3–4.8 mm;

blades 3–5 per fertile culm, 10–32 cm × 1.4–3(–3.5) mm.

basal;

proximal leaves with blades 5–6 mm wide.

arching or nodding, dense or open, green, yellow, or brown at maturity, 1.5–6 cm × 5–20 mm;

proximal internode 2–12 mm; 2d internode 2–13 mm;

proximal bracts scalelike, with bristle tip.

spikes approximate, oblong to elongate, 8–25 × 3–8 mm;

proximal spike separate, sometimes pendent and long-pedunculate;

lateral spikes 2–4;

distal spikes erect, short-pedunculate.

3–10, distinct, ellipsoid, 7–16 × 3–9(–13) mm, base acute to short-attenuate, apex acute to rounded.

ascending or rarely widely spreading, golden brown, conspicuously 5-veined on each face or fewer adaxially, winged to base, lanceolate, flat except over achene, 4.2–6.8 × 1.2–2 mm, length at least 3 times width, 0.35–0.55 mm thick, margin flat, including wing 0.2–0.6 mm wide;

beak pale to golden-brown at tip, flattish, ciliate-serrulate, abaxial suture with white or golden brown hyaline margin, distance from beak tip to achene 2.2–4.8 mm.

veinless, ovate, 3-5–4 × 1.5–2 mm, papillose;

beak 0.3–0.5 mm, shallowly bidentate or truncate, sparsely papillose or smooth.

ovate or elliptic, 1.3–1.7 × 0.7–0.9 mm, 0.3–0.4 mm thick.

scales hyaline brown, occasionally with green or gold midstripe, lanceolate, 3.4–4 mm, shorter and narrower than perigynia, apex acuminate.

scales dark brown to black, ovate or lanceolate, equaling and as wide as perigynia, apex acute or mucronate.