Flora of North America species comparison

10–35 cm.

densely tufted, ascending, lax or, occasionally, decumbent, 13–78 cm × 0.8–1 mm.

sheath adaxially white-hyaline, summits U-shaped;

distal ligules 0.9–2 mm;

blades 2–4(–5) per fertile culm, occasionally folded, 6–20 cm × (0.5–)1–2(–2.5) mm, if not folded, margins revolute.

basal sheaths purple or purple tinged;

sheaths 2–42 mm;

blades ascending or lax, erect, green or yellow-green, midrib developed adaxially, 2 lateral veins abaxially, 19–38 cm × 1–5 mm, blades of overwintering leaves smooth.

0.5–11.2 cm × 0.5–4 mm, angles of bract sheath denticulate;

bract blade of distal lateral spikes linear, narrower than spikes, not concealing them;

widest bract blade of distalmost lateral spike 0.5–3.4 mm wide.

dense or open, gold to dark brown, 1.7–3 cm × 11–18 mm;

proximal internode 4–8.6 mm; 2d internode 1.5–3.5 mm;

proximal bracts usually scalelike or bristlelike, occasionally leaflike, shorter than inflorescences.

peduncles proximal pistillate spikes to 11 cm, distal spike sessile; staminate spike 0.5–10.6 cm.

3–6, distant to loosely aggregated, distinct or individually indistinct, broadly ovoid, 10–15 × 7–9 mm, base acute to attenuate, apex rounded.

(3–)4(–5) per culm;

lateral spikes 5–27 × 3–4 mm;

internode between proximal scales in proximal spike 1.1–3.2(–4.8) mm;

terminal spike linear, 11–21 × 1–2.2 mm.

ascending to spreading, gold to coppery; conspicuously 3–11-veined abaxially, conspicuously 0–13-veined adaxially, broadly ovate, usually flat, 4.3–6.3 × 2–3 mm, 0.25–0.5 mm thick, margin flat, including wing 0.4–0.9 mm wide, edge often minutely crinkled;

beak red-brown or brown, usually white-hyaline at tip, cylindric, unwinged, ± entire for (0.3–)0.5–0.9 mm, ciliate-serrulate at least on distal body, abaxial suture inconspicuous or with conspicuous white margin, distance from beak tip to achene (1.9–)2.2–3.7 mm.

4–12 per spike, closely overlapping, aggregated, ascending, conspicuously (22–)25–32-veined, elliptic-obovate, 2.8–3 × 1.5–1.8 mm, 1.8–2.7 times long as wide;

beak abruptly bent, 0.2–0.8 mm.

elliptic, 1.5–2.1 × 0.75–1.1(–1.3) mm, 0.25–0.5 mm thick.

obovoid, 2.6–2.8 × 1.3–1.6 mm.

scales gold or reddish to dark brown, with pale midstripe, lanceolate to ovate, 3.5–4.8 mm, usually shorter than and 1/3–1/2 width of perigynia, margin white, 0–0.2 mm wide, apex obtuse to acuminate.

scales 2.8–3 × 1–1.2 mm, apex acute to aristate, awn to 1 mm.

long-persistent.

2.6–3 mm.

scales 3.5–4 × 1.2–1.5 mm, margins hyaline, purple-brown or brownish purple tinged, apex acute.

= 33, 38, 40.