Flora of North America species comparison

spreading to nodding, (10.7–)18–39 cm, 0.5–0.8 of total plant height.

15–120 cm;

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

basal sheaths pale brown to dark brown;

blades green, exceeding culms, 1.4–3.7 mm wide, herbaceous, margins green, smooth or scabrous.

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.

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–)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.

pale green to pale brown, often speckled reddish brown, narrowly ovoid or lance-ovoid, (5.8–)6.2–7.6(–8) × 1.4–2 mm, tightly enveloping achenes, apex gradually tapering;

beak (2.5–)2.7–3.7(–4.3) mm, scabrous.

(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.

brown, oblong, (2.4–)2.6–3(–3.4) × (1.3–)1.5–1.7(–1.9) mm.

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

spikes 1–4, basal, on nodding peduncles.

spikes with staminate portion 4–61-flowered, (4–)12.7–25.6 × 0.7–1.4 mm; pistillate portion 2–4(–6)-flowered.

scales green, sometimes tinged with white or reddish brown, (0.9–)1.2–2.4 mm wide, apex attenuate to green awns;

distal scales with hyaline margins 0.3–0.8 mm wide, not more than 1.5 times as wide as and not concealing perigynia, apex acute, awnless.

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 green or tinged with light brown, ovate, 2.2–3.9 × 1.6–2 mm, margins free but enfolding scales above, hyaline, white, apex obtuse, erose.

0.8–1.5 mm.

filiform, flexuous, long, slender, strongly papillose.

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