Flora of North America species comparison

trigonous in cross section, 18–65 cm, smooth distally.

23–88 cm × 0.5–1.6 mm, smooth.

basal sheaths pale brown;

ligules as wide to wider than long;

blades pale to mid green, flat to W-shaped, 4–11 mm wide, glabrous.

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.

8–24 cm;

proximal bract 11–37 cm, exceeding inflorescence;

proximal 2–4 spikes pistillate, erect or often the proximal ascending to spreading;

terminal 1(–2) spikes staminate.

(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.

ascending, 7–11-veined, narrowly elliptic, 4.2–7 × 1.3–1.8 mm, apex tapered;

beak 1.4–2.4 mm, bidentulate, smooth, teeth straight, 0.2–0.5 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.

pale brown, trigonous, smooth.

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

scales lanceolate-acuminate, 2.4–6.9 × 0.3–0.9 mm, shorter than or the proximal longer than perigynia, margins serrulate-ciliate, apex with prominent scabrous awn.

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 acute to acuminate, smooth except at tip.

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

3.

2–3.4 mm.

1.7–2.9 mm.