Flora of North America species comparison

yellow-brown at base, 10–60(–75) cm.

23–88 cm × 0.5–1.6 mm, smooth.

sheaths glabrous;

blades glaucous, widest blades 6.3–14.7 mm wide, smooth abaxially or sparsely antrorsely scaberulous on main veins.

ligules 1–3.5 mm, 1–3 times as long as wide;

blades 1.1–4.4 mm wide, widest blade 1.3–4.4 mm wide.

0.40–1 of culm height;

peduncles of lateral spikes smooth;

peduncles of terminal spikes 0.7–20(–51) mm, barely to much exceeding lateral spikes;

proximal bract sheath loose, abaxially glabrous, sheath front apex truncate;

ligules (3–)4.7–9 mm;

distal bract slightly shorter than to much exceeding terminal spike.

(12–)21–63(–71) mm;

proximal internode 3.3–16(–23) mm;

proximal bracts 5–24(–28) mm, awn 1.3–19 mm;

spikes 3–8, usually gynecandrous, sometimes also pistillate, staminate or with pistillate and staminate flowers scattered throughout;

proximal spikes with 0–2 staminate and 9–19 pistillate flowers, 10–17(–20) × 1.8–5 mm;

terminal spikes usually with 0–3 staminate and 8–18 pistillate flowers, 9–20(–25) × 1.5–5 mm.

4–6, distal 2–4 overlapping;

lateral spikes pistillate, with 12–39 perigynia, 11–41 × (5–)5.7–8(–9.6) mm, ratio of spike length (in mm) to flower number = (0.86–)1–1.3(–1.6);

terminal spikes 6–34 × 1–3.2 mm.

spirally imbricate, 44–57-veined, unwrinkled, oblong-ovoid, (4–)4.2–5.5(–6) × (1.5–)1.7–2.4 mm, (2–)2.2–2.8(–3.1) times as long as wide, obtusely triangular in cross section, dull, base very gradually tapered, apex gradually tapered;

beak absent or straight, 0–0.3 mm.

erect, green to pale brown, (3–)4–8-veined abaxially, prominently to weakly 3–6-veined adaxially, narrowly lanceolate, (3.3–)4.1–6.7 × 0.8–1.3 mm, (3.5–)4–6.1(–6.6) times as long as wide, apex abruptly contracted or gradually tapering;

beak 1.2–2.2(–2.8) mm, 0.28–0.51 times as long as perigynia, margins serrulate, apex entire or bidentulate, teeth to 0.2 mm, 0–0.05 times as long as perigynia.

obovoid, 2.5–3.4 × (1.3–)1.4–1.6(–1.7) mm, 0.37–0.5 times as long as perigynia, loosely enveloped by perigynia;

stipe straight, (0.2–)0.3–0.5(–0.6) mm;

beak straight or bent less than 30°, (0.1–)0.2–0.4(–0.5) mm.

1.7–2.2 × 0.7–1.1 mm, 1.9–2.9 times as long as wide.

scales 1.9–2.8(–3.1) × (1.5–)1.7–2.4 mm, margins whitish, entire, apex awnless or with awn to 0.6(–1.6) mm.

scales with pale to red-brown margins, 2.8–4.1 × 1.1–1.6 mm, apex acuminate or with awn to 0.6 mm.

scales 3.8–5.3  1–1.8 mm.

scales with pale to red-brown margins, 2.8–3.9 × 1.4–1.6 mm, apex acute to acuminate.

1.6–2 mm.

1.7–2.9 mm.

2–3.4 mm.