Flora of North America species comparison

15–120 cm;

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

obtusely trigonous in cross section, (25–)40–175 cm, smooth.

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.

ligules 2.5–10 mm, as wide as long to wider than long;

blades yellowish green to light green, M-shaped to flat, 6–18(–21) mm wide, smooth or sometimes finely papillose and scabrous adaxially, especially distally;

widest leaves of vegetative shoots 8–18(–21) mm wide.

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.

15–85 cm;

bract sheaths prolonged, apex truncate to convex;

proximal 3–5 spikes pistillate (occasionally a few empty scales at apex), erect or the proximal nodding, ovoid to short cylindric.

(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.

(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.

ascending to spreading, yellowish green, 18–26-veined, slightly inflated, lanceolate, 10.3–15.6 × 1.8–3.3 mm, 4–7 times as long as wide, apex gradually tapered, bidentulate;

beak absent.

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

(3.2–)3.4–4(–4.5) × 1.5–2.3 mm, (1.7–)1.8–2.4 times as long as wide.

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 lanceolate to narrowly ovate, mostly 2/3 as long as to exceeding perigynia, apex acuminate-awned.

3–5 mm.

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

= 56.