Flora of North America species comparison

15–120 cm;

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

(35–)45–95(–110) cm;

vegetative culms inconspicuous.

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.

sheaths sometimes abaxially green and white mottled near to collar, adaxially green-veined near collar, Y-shaped, white-hyaline area at collar, adaxially firm, summits U-shaped;

distal ligules 2–5.5 mm;

blades on fertile culms 3–5, 1.5–24 cm × 1.8–4 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.

open or dense, usually nodding or arching, yellowish brown, 2.3–8.4 cm × 6–17 mm;

proximal internode 2.3–16 mm; 2d internode 6–15 mm;

proximal bracts bristlelike to 3 cm.

(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.

(3–)5–8(–9), distant, distinct, conic to globose, 8–19 × 4.2–8.2 mm, base often strongly clavate, apex acute to rounded; staminate portion of well-developed spikes to 11 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.

appressed, pale yellow or golden brown with green wing and beak, conspicuously 4–6-veined abaxially, conspicuously 4–6(–7)-veined adaxially, obovate to broadly elliptic, biconvex, 3–4.7 × 1.9–2.8 mm, 0.4–0.5 mm thick, margin flat, including wing 0.5–0.9 mm wide;

beak greenish at tip, flat, ciliate-serrulate, abaxial suture with white or reddish brown-hyaline margin, distance from beak tip to achene 1.8–2.7 mm.

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

elliptic, 1.4–2 × 0.9–1.2 mm, 0.4–0.5 mm thick, 48b apiculum 0.4–0.8 mm;

style straight or slightly sinuous.

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 yellowish brown to reddish brown with green midstripe, lanceolate or narrowly ovate, 3–4 mm, shorter and narrower than perigynia, margins white-hyaline, apex acute to obtuse.

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

= 62.