Flora of North America species comparison

in medium- to large-sized clumps, 30–90 cm.

23–88 cm × 0.5–1.6 mm, smooth.

cauline, usually overtopping culms;

blades 10–40(–50) cm × 4–9 mm.

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.

with proximal spikes ± strongly separate on slender peduncles, others approximate and short-pedunculate or subsessile, narrowly oblong to cylindric, 1–4 cm × 3.5–5.6 mm;

lateral spikes, if gynecandrous, with ca. 30–140 pistillate flowers distally and (0–)1–10 staminate flowers proximally;

terminal spikes staminate proximally, 1/2–3/4 pistillate distally.

(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.

olive green to brown, very broadly compressed-obovoid, sharply edged, 2–2.6 × 1.8–2.4 mm;

beak often projecting out at 90° angle.

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.

widely oblong-obovoid, 1.5–1.8 × 1–1.3 mm, apex short-apiculate.

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

scales ovate, 1.5–3.2 mm, mostly not quite as long as perigynia.

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

1.7–2.9 mm.

2–3.4 mm.