Flora of North America species comparison

10–90(–135) cm.

20–104 cm.

3–6 per culm;

sheaths tight, inner band hyaline, 1.8–2.5 cm, apex concave, glabrous;

ligules 0.6–2.5(–4.5) mm, rounded to ± acute;

blades plicate, 5–40 cm × 0.7–3.3(–3.8) mm, widest leaf 1–3.3(–3.8) mm wide.

sheath white-hyaline, summits usually U-shaped, sometimes rounded and prolonged to 3 mm beyond collar;

distal ligules 1–3(–6) mm;

blades 3–5(–8) per fertile culm, 6–45 cm × 1.2–3(–3.7) mm.

0.7–7.8 cm;

spikes (2–)3–8;

lateral spikes pistillate often with few staminate flowers proximally, 3–15.5 mm, sessile, staminate portion 7-flowered, to 8.2 mm, pistillate portion 3–32-flowered, 2.5–11 mm;

basal 2 spikes 1.7–42 mm apart;

terminal spike gynecandrous, 5–24 mm, staminate portion 2–17-flowered, 2–16.5 × 0.9–2 mm, pistillate portion 4–26-flowered, 2.6–9 × 4.9–9.1 mm.

open or dense, green to brown, 1.1–3 cm × 5.4–16.3 mm, appearing fine-textured;

proximal internode (1.5–)2.5–9.5 mm; 2d internode 1–3(–6) mm;

proximal bracts scalelike or bristlelike shorter than inflorescences.

4–11(–14), densely or loosely aggregated, broadly ovoid to ovoid, 5–11 × 2.7–7.1 mm, base rounded or acute, apex usually rounded.

spreading to reflexed, castaneous to dark brown, 2–14-veined abaxially, 0–12-veined adaxially over achene, lanceolate to ovate, (2.65–)2.9–4.75 × 0.8–2.1 mm, (1.7–)1.8–3.2(–3.6) times as long as wide;

beak (0.85–)0.95–2 mm, (0.4–)0.45–0.86 length of body, serrulate, teeth (0–)0.15–0.5 mm.

ascending to spreading, green, straw colored to light brown, or whitish, conspicuously (0–)2–8(–11)-veined abaxially, conspicuously 0–6-veined adaxially, veins thick, reaching, not extending beyong top of achene, lance-ovate to ovate, plano-convex, 2.4–4(–4.3) × 0.9–1.9 mm, 0.4–0.5(–0.6) mm thick, 2.1–2.7 times as long as wide, margin flat, including wing 0.15–0.3(–0.45) mm wide, ciliate-serrulate at least on distal body;

beak green, gold, brown or white-hyaline at tip, flat, ± ciliate-serrulate or cylindric, unwinged, ± entire for 0.4–0.7 mm, abaxial suture usually inconspicuous, distance from beak tip to achene 1.2–2 mm.

ovate-lanceolate to rhombic-ovate, 1.3–2.1 × 0.8–1.55 mm.

elliptic to quadrate, 1–1.6 × 0.7–1.25 mm, (0.3–)0.4–0.5(–0.6) mm thick.

scales ovate, (1.4–)2.1–3.1 × 0.7–2.3 mm, apex acute to sometimes obtuse.

scales usually white-hyaline or hyaline gold, occasionally chestnut to dark brown, with pale to green midstripe, ovate to broad-ovate, 2.1–3.5(–3.9) mm, shorter than or ± covering perigynia, margin white, 0–0.2 mm wide, apex obtuse to acuminate.

scales ovate-lanceolate to ovate, 1.3–3.8 × 0.8–1.7 mm, base clavate, apex acute.

0.8–1.6(–2) mm.

= 58.

= 84.