Flora of North America species comparison

25–120 cm;

vegetative culms inconspicuous with few leaves clustered at apex.

straight, 25–60 cm.

sheaths conspicuously green-veined adaxially nearly to apex, narrow hyaline band or sharp Y-shaped region at collar, adaxially firm, summits U-shaped, not prolonged;

distal ligules 1.5–4.5 mm;

blades 3–5 per fertile culm, 9–25 cm × 2–3.5 mm.

of flowering stems shorter than stem, to 13.5 cm × 1.5–3.1(–4.3) mm.

erect, open, yellow-green to brown, 1.5–4 cm × 4–12 mm;

proximal internode 3–12 mm; 2d internode 3–9 mm;

proximal bracts scalelike, with bristle tips, shorter than inflorescences.

peduncles of staminate spikes 5–70 mm;

bracts 90 × 0.7–2.2 mm;

inner band of sheaths with brown, convex projection to 3.2 mm.

2–8, distinct, ellipsoid to globose, 5–13 × 4–6.5 mm, base acute, apex rounded; staminate portion of well-developed spikes less than 2 mm.

proximal pistillate spikes 1–3(–4), distant, erect or ascending, usually conspicuously pedunculate, ovoid to short-cylindric, proximal 10–20 × 5–9.5 mm;

terminal staminate spikes 10–33 × 1.6–4.2 mm.

spreading, green to light brown, conspicuously 4–many-veined on each face, winged to base, obovate, flat except over achene or somewhat plano-convex, 2.6–4.5 × 1.5–2.7 mm, 0.3–0.45 mm thick, margin flat, including wing 0.4–0.7 mm wide;

beak pale brown at tip, flat, ciliate-serrulate, abaxial suture with white or brown hyaline margin, distance from beak tip to achene 1–2 mm.

ascending, yellowish, 3.1–5.5 × 1.2–2.1 mm, apex gradually narrowed into straight, serrulate beak;

beak 0.7–1.6 mm.

oblong, 1.3–1.7 × 0.75–1 mm, 0.3–0.4 mm thick;

styles laterally sinuate.

1.5–2 × 1–1.5 mm.

scales white-hyaline or brown, with green midstripe, broadly lanceolate or ovate, 2.5–3.4 mm, longer and narrower than perigynia, apex acute.

pistillate scales dark brown, 2.1–3.9 × 1.4–2.4 mm, margins conspicuously white-hyaline; staminate scales with broad, white, hyaline margins.

2–3.6 mm.

= 66.