Flora of North America species comparison

strongly purple-red to (3.4–)5.5–9.6 cm high at base, 14–60 cm.

23–88 cm × 0.5–1.6 mm, smooth.

sheaths glabrous;

blades green, widest blades (3–)3.5–6.5 mm wide, smooth abaxially.

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.

0.55–0.96 of culm height;

peduncles of lateral spikes barely scaberulous or smooth;

peduncles of terminal spike 2.4–49 mm, barely to much exceeding lateral spikes;

proximal bract sheaths tight, abaxially glabrous, sheath front truncate or slightly convex, elongated to 3.1(–4.8) mm beyond apex;

ligules 0.7–3.8(–13.4) mm;

blades uniformly green, distal bract usually 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.

3–6, widely separate or distal 2–3 overlapping;

lateral spikes pistillate, with (2–)5–14 perigynia, (4–)9–24 × (1.6–)2.9–6.4(–6.9) mm, ratio of spike length (in mm) to flower number = 1.5–2.3;

terminal spikes (6–)14–26(–30) × (0.8–)1.3–2.5(–3) mm.

distichously imbricate, 57–69-veined, unwrinkled, oblong or elliptic to narrowly oblong or narrowly elliptic, obtusely triangular in cross section, (3.9–)4.2–4.9(–5.1) × (1.4–)1.6–1.8 mm, (2.4–)2.5–3.3 times as long as wide, 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, 2.8–3.7 × 1.3–1.7 mm, tightly enveloped by perigynia;

stipe straight;

beak straight, (0.3–)0.4–0.7 mm.

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

scales 2.8–4.5 × (1.2–)1.7–2.2 mm, margins whitish or tinged pale red-brown, entire, apex with awn 0.3–2.5 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 3.3–4.9 × 1.1–1.7 mm.

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

2.2–3.2 mm.

1.7–2.9 mm.

2–3.4 mm.