Flora of North America species comparison

15–70 cm.

20–80 cm;

vegetative culms with leaf blades in stiff rosettes.

sheaths adaxially white-hyaline, summits U-shaped, occasionally shortly prolonged beyond collar;

distal ligules 0.8–1 mm;

blades 3–5 per fertile culm, often folded, 3.5–20 cm × 1–3 mm.

sheaths adaxially green-veined nearly to collar, with a white-hyaline band or sharp Y-shaped hyaline region at collar; adaxially firm, summits truncate, prolonged 0.3 mm beyond collar, abaxially finely papillose;

distal ligules 2–7 mm;

blades 2–4 per fertile culm, 14–30 cm × 3–6(–8) mm.

stiffly erect, open or spikes loosely aggregate, if open, sometimes arching, whitish to pale brown, 1.5–5 cm × 5–10 mm;

proximal internode 5–10 mm; 2d internode 4–8 mm;

proximal bracts scalelike to bristlelike, shorter than inflorescences.

dense or open, light green or brown, 1.5–4(–5) cm × 7–16 mm;

proximal internode 3–5(–12) mm; 2d internode 2–9 mm;

proximal bracts bristlelike or, sometimes, leaflike.

3–5, distant, distinct, ovoid-ellipsoid, 7–14 × 3–8 mm, base tapered to attenuate, apex acute.

3–10, distant, distinct, conic or ovoid, 6–12 × 4–7 mm, base truncate or rounded, apex obtuse; staminate portion 2 mm or less.

essentially erect, pale yellowish brown, often with green beak, 8–10-veined abaxially, veinless or indistinctly 8–10-veined adaxially, ovate to broadly ovate, plano-convex or thickly concavo-convex, 3.8–4.8 × 1.4–2.2 mm, 0.5–0.6 mm thick, margin flat, including wing 0.2–0.4 mm wide, ciliate-serrulate at least on distal body;

beak white-hyaline at tip, flat, ± ciliate-serrulate to the bidentate apex, abaxial suture inconspicuous or white-hyaline, distance from beak tip to achene 1.4–2.2 mm.

appressed, greenish to dark brown, conspicuously 3–7-veined abaxially, inconspicuously veined adaxially, obovate, concavo-convex, 3–4.2 × (1.8–)2–3.2 mm, 0.5–0.7 mm thick, margin flat, including wing 0.5–0.8 mm wide;

beak appressed-ascending, brown at tip, flat, ciliate-serrulate, abaxial suture with white or hyaline brown margin, distance from beak tip to achene 1.5–2 mm.

ovate-oblong, 1.7–2.1 × 1.2–1.4 mm, 0.5–0.6 mm thick.

elliptic, 1.7–1.9 × 1.1–1.25 mm, 0.5–0.6 mm thick;

styles abaxially-adaxially bent.

scales whitish to yellowish, with 1-veined, green to gold midstripe, or white almost throughout at maturity, ovate, 4.4–6 mm, longer and as wide as and concealing perigynia, margin hyaline, 0.3–0.7 mm wide, apex acute.

scales white-hyaline or brown, with green or white midstripe extending to tip, broadly lanceolate, 2.8–3.5 mm, shorter and narrower than perigynia, apex firm, obtuse or acute.

= 68.

= 36, 38.