Flora of North America species comparison

15–120 cm;

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

15–55 cm, smooth to scabrous distally.

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.

proximal sheaths pale brown to dark brown, occasionally red tinged, 4.5–8(–10) mm thick;

ligules 1.2–3.9 mm, usually 0.6–1.5 times as long as wide;

leaf blades very glaucous, channeled, 4.5–40 cm × 1.5–3.5(–6.5) mm, coriaceous.

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.

2.2–8.59(–12) cm, 0.6–1.8 length of proximal bract;

proximal bract 0.8–11 mm, sheath 0–1.2cm, blade 0.8-10 cm; pistillate spikes densely flowered, ovoid to short-cylindric, 0.7–2.5 cm × 4–5.5 mm wide;

lateral spikes erect or ascending on stiff peduncles.

(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.

strongly ascending in the spikes, glaucous, fusiform, 3–4.8(–5) × (1–)1.3–2 mm wide, heavily papillose;

beak absent or minute, erect, straight.

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

pale to dark brown, 2.1–2.5 × 1.2–1.8 mm 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 pale brown to dark purple-brown with broad green center and narrow hyaline margins, obtuse to acute.

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

= 32.