Flora of North America species comparison

30–140 cm.

phyllopodic, with dead leaf remains at base, 20–60 cm.

sheaths adaxially conspicuously green-veined nearly to collar, narrow hyaline band or sharp Y-shaped region at collar, adaxially firm, sometimes papillose, summits U-shaped;

distal ligules 2.8–8 mm;

blades 3–7 per fertile culm, 11–50 cm × 2.5–6 mm.

blades 1.5–4 mm wide, margins sometimes revolute, scabrid at tip.

dense or open, pale green or brown, 2–6.5 cm × 7–20 mm;

proximal internode 3–13 mm; 2d internode 4–10 mm;

proximal bracts scalelike with bristle tips shorter than inflorescences.

proximal bracts 0.5-2 cm, shorter than inflorescences;

lateral spikes 12–20 × 6–8 mm, with (7–)10–25 perigynia;

terminal spikes 10–25 × 2.2–3 mm.

3–11, distant, distinct, ellipsoid to ovoid, 6–20 × 4–9 mm, base rounded or short-acute, apex broadly acute to obtuse.

± spreading, light or golden brown, faintly 3–8-veined on each face, obovate, flat except over achene, 4–5.5 × 2.5–3.8 mm, 0.4–0.5 mm thick, margin flat, including wing 0.8–1.5 mm wide;

beak light brown at tip, flat, 0.85–2.2 mm, ciliate-serrulate, abaxial suture with light brown margin, distance from beak tip to achene 1.8–3 mm.

3.2–4.2 × 1.5–2.6 mm, apex tapering to rounded;

beak absent.

oblong, 1.7–2 × 0.9–1.1 mm, 0.3–0.4 mm thick.

scales white-hyaline or tan, with green midstripe extending to tip, lanceolate, 2.8–3.5(–3.8) mm, shorter or longer and much narrower than perigynia, apex firm, acuminate or awned to 0.8 mm.

scales ovate-circular, 3.5–4.5 × 2.1–3.8 mm, slightly shorter than and wider than perigynia, apex acute to acuminate, mucronate, or shortly awned less than 1.5 mm.

scales oblong-ovate, 3–4.7 × 1.2–2.4 mm, apex obtuse.

2–2.3 mm.

= 74.