Flora of North America species comparison

15–120 cm;

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

solitary or not, erect, 35–120 cm.

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.

4–8;

basal sheaths reddish to brownish;

sheath of distal leaf 5–20 cm;

ligules triangular, 4.5–35 mm;

blades 20–60 cm × 5–16 mm.

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.

15–40 cm;

peduncles of basal 2 pistillate spikes 5–20 cm apart; of terminal 3–8 cm shorter than to somewhat exceeding the distal pistillate spike;

bracts leafy, sheath 0.5–5 cm, blades 30–60 cm × 6–11 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.

proximal pistillate spikes 2–5 per culm, ± separate, 20–75-flowered, cylindric, 3–8 × 2–3 cm;

terminal staminate spikes 1–5, 2–8 cm × 2–4 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.

stiffly spreading at right angles to rachis, lanceoloid to lance-ovoid, 11–18 × 4–6 mm, shiny, glabrous;

beak conic, 6–9 mm.

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

broadly stipitate, obconic with rounded to truncate summit and concave faces, angles strongly thickened, 2.2–2.6 × 2.7–3 mm;

style same texture as achene.

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 3–5-veined, lanceolate to lanceolate-ovate, 4.5–10.5 × 1.5–2 mm.

3, 2.8–5 mm.

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