Flora of North America species comparison

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

15–120 cm;

vegetative culms few, inconspicuous, usually fewer than 15 leaves, not strikingly 3-ranked.

sheaths glabrous;

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

sheaths adaxially white-hyaline, summits U-shaped or sometimes prolonged to 2 mm beyond collar and rounded, smooth;

distal ligules 2.2–3.5 mm;

blades 3–5 per fertile culm, 12–30 cm × 1.5–3.5 mm.

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.

open, brown, (1.3–)2.5–5(–6.5) cm × 5–18 mm;

proximal internode (3–)6–13(–23) mm; 2d internode 2–12 mm;

proximal bracts scalelike or bristlelike, shorter than inflorescences.

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.

(3–)4–7, 5–7 on larger culms, distant, distinct, ovoid to ellipsoid, 7–17(–24) × 4–8(–12) mm, base attenuate or rarely rounded, apex acute to rounded;

terminal spike usually with conspicuous staminate base.

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.

(10–)15–40(–45) per spike, ascending-spreading, green or reddish brown, veinless or faintly and irregularly 1–5-veined adaxially, orbiculate or broadly ovate, plano-convex, (2.6–)3.4–4.8(–5.2) × (2–)2.3–3.2 mm, 0.5–0.6 mm thick, 1.2–1.8 times as long as wide, nearly leathery, margin flat, including wing 0.3–0.8 mm wide, ciliate-serrulate at least distally, smooth;

beak pale green or brown at tip, flat, ± ciliate-serrulate, abaxial suture with gold or reddish brown-hyaline margin, distance from beak tip to achene 1.5–2.4 mm.

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.

orbiculate to broadly ovate, 1.5–2.2 × 1.3–1.8 mm, 0.5–0.6 mm thick.

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 white-hyaline, tinged reddish brown, usually with whitish, pale gold, or green midstripe, broadly lanceolate to narrowly ovate, 2.6–4.3 mm, as long as to 0.7–0.9 mm shorter than perignyium beaks, narrower than perigynia, margins thin, sometimes involute, apex mostly acute.

scales 3.3–4.9 × 1.1–1.7 mm.

2.2–3.2 mm.

= 48, 52, 56, 60, 64, 68.