Flora of North America species comparison

(35–)40–110 cm;

vegetative culms few, inconspicuous, with 6–8 leaves, not strikingly 3-ranked.

15–85 cm;

vegetative culms inconspicuous.

sheaths adaxially white-hyaline, summits concave or truncate, prolonged beyond collar to 2.5 mm, papillose at least near apex;

distal ligules 1–5 mm;

blades 3–4 per fertile culm, 2.5–25 cm × 2–5 mm, usually adaxially papillose.

sheaths conspicuously green-veined adaxially nearly to collar, narrow hyaline band or sharp Y-shaped region at collar, adaxially firm, summits truncate, prolonged 1–4 mm beyond collar, lateral auricles usually present, finely papillose (30X);

distal ligules 1.2–3.5 mm;

blades 2–4 per fertile culm, ± whitish green, 10–25 cm × 1–5 mm, stiff.

open, pale brown, 0.24–0.62 cm × 8–15 mm;

proximal internode 5–17 mm; 2d internode 3–10 mm;

proximal bracts scalelike, with bristle tips shorter than inflorescences.

arching or nodding, open, silvery green, (2.5–)4–8 cm × 5–12 mm;

proximal internode 5–22 mm; 2d internode 6–19 mm;

proximal bracts scalelike or bristlelike, shorter than inflorescences.

3–6(–8), distant, distinct, ovoid to clavate, 7–21 × 5.5–12 mm, base rounded to long tapered, apex rounded.

3–7(–12), distant, distinct, ellipsoid, (5–)10–20 × 4–8 mm, bases clavate, apex acute to obtuse; staminate portion of well-developed spikes 2–11 mm.

15–80 in larger spikes, ascending or ascending-spreading, green to pale whitish green with reddish brown margin, conspicuously 8–12-veined abaxially, 4–8-veined adaxially, broadly elliptic to nearly orbiculate, (4.5–)5.1–6.7(–7.1) × (2.4–)2.8–4.2 mm, 0.5–0.7 mm thick, membranaceous with brown achene visible through hyaline adaxial face, margin flat, including wing 0.8–1.2 mm wide, often erose, scalloped, or with an irregular tooth, smooth;

beak pale brown at tip, flat, ciliate-serrulate, abaxial suture inconspicuous, distance from beak tip to achene 2.4–3.7 mm.

appressed, light brown, conspicuously 6–12-veined abaxially, conspicuously 3–5-veined adaxially, obovate to elliptic, somewhat concavo-convex, 3.5–5 × 2–3.2 mm, 0.5–0.6 mm thick, margin flat, including wing 0.5–0.8 mm wide, somewhat papillose;

beak light brown at tip, flat, ciliate-serrulate, abaxial suture with conspicuous white-hyaline margin, distance from beak tip to achene 1.5–2.5 mm.

elliptic to oblong, 1.6–2.2 × 1.1–1.6 mm, 0.5 mm thick.

elliptic, 1.6–1.8 × 1–1.2 mm, 0.5–0.6 mm thick.

scales reddish brown with green midstripe, lance-ovate to ovate, 3.1–5.4 mm, 1.9–3.2 times as long as wide, (1–)1.4–2.3 mm shorter than perigynia, narrower than perignyia, apex obtuse to acute.

scales white-hyaline, with green to gold midstripe, ovate, 4–5.2 mm, as long as and narrower than perigynia, margins frequently involute, apex acute; staminate scales with apex acute.

(2.4–)2.8–4.2 mm.

scales obtuse.

= 76, 78.

= 74, 76.