Flora of North America species comparison

yellow-brown to dark brown at base, 15–60 cm.

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

sheaths hispidulous;

blades green, widest blades (3–)3.4–5.4(–6.5) mm wide, glabrous abaxially or sparsely hispidulous on midrib.

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.

0.19–0.48 of culm height;

peduncles of lateral spikes smooth or barely scaberulous;

peduncles of terminal spikes (4.2–)7.5–37(–43) mm, much exceeding lateral spikes;

proximal bract with sheath tight, abaxially scabrous, sheath front apex convex, elongated (0.6–)1.6–4.9(–6.6) mm beyond apex;

ligules 3.3–5 mm;

distal bract usually much exceeding terminal spike.

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

3–5, separate or distal 2–4 spikes overlapping;

lateral spikes pistillate, with 2–7 perigynia, 6–29 × 3.8–6.8 mm, ratio of spike length (in mm) to flower number = 3.5–4.8;

longest terminal spikes 14–34(–42) × 1.3–3(–3.5) mm.

(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.

distichously imbricate, 52–59-veined, unwrinkled, obovoid or narrowly obovoid, obtusely triangular in cross section, (4.5–)4.6–5.6(–6.2) × 1.9–2.2(–2.3) mm, (2.1–)2.3–2.8(–3) times as long as wide, dull, base gradually tapered, apex abruptly contracted;

beak excurved, (0.5–)0.8–1.3 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.

obovoid-ellipsoid, 3.2–3.9(–4.2) × (1.6–)1.8–2.1 mm, tightly enveloped by perigynia;

stipe bent 45–70°, 0.4–0.6 mm;

beak bent more than 90°, 0.3–0.5 mm.

obovoid, 2.6–2.8 × 1.3–1.6 mm.

scales (4.1–)5.6–9.4(–11.6) × 1.6–2.6(–3.3) mm, margins whitish, denticulate, apex with awn 1.1–6.8 mm.

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

scales 5.2–6.9 × 1.5–1.7 mm.

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

3.4–4.2 mm.

2.6–3 mm.

= 33, 38, 40.