Flora of North America species comparison

20–100 cm;

vegetative culms with few leaves clustered at apex.

aphyllopodic, without dead leaf remains at base, 20–70 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.

blades 2–5 mm wide, margins revolute, scabrous at tip.

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.

proximal bracts 4–11 cm, shorter to longer than inflorescences;

lateral spikes 10–30 × 6–8 mm, with 15–40 perigynia;

terminal spikes 12–32 × 3–8 mm.

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.

3.8–6.8 × 1.7–2.3 mm, apex tapering and rounded;

beak 0.1–0.3 mm.

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 lanceolate, 3–7.5(–9) × 1.6–2.5 mm, narrower that, longer than perigynia, awn to 2–12 mm.

scales oblong-obovate, 4.5–6 × 1.3–2.4 mm, apex bifid to emarginate, at least proximal scales with awn 2–6 mm.

3.3–5 mm.

= 60.