Flora of North America species comparison

10–90(–135) cm.

to 80 cm × 2 mm, scabrous throughout.

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.

sheaths all with blades, fronts smooth, lacking spots, veinless, apex yellow, thickened, truncate, cartilaginous, entire;

ligules acute, 5 mm, free limb to 0.5 mm;

blades yellow-green, epistomic, to 60 cm × 6 mm, papillose adaxially (25X).

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.

densely spicate, cylindric, elongate, with 6–15 distinguishable branches, 3–6 × 1.5 cm;

proximal internode to 10 mm;

proximal bracts setaceous, apparent.

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.

pale brown, red-brown distally, with red-brown veins, 10–12-veined abaxially, 7-veined adaxially, to 6 × 2.6 mm, base slightly distended proximally, cordate;

stipe to 0.2 mm;

beak to 2.5 mm, margins serrulate.

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

ovate, 2 × 1.3 mm;

stalk to 0.3 mm;

persistent style base cylindric, 0.3 mm.

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

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

0.8–1.6(–2) mm.

hyaline.

= 58.

= 46.