Flora of North America species comparison

(20–)30–100 cm, 1.5–3.5 mm wide basally, 0.7–1.2 mm wide distally.

50–90 cm;

vegetative culms with numerous leaves spaced evenly along distal 1/2.

sheaths usually loose, proximal green-and-white-striped and green-and-white-mottled, with conspicous transverse veins on back, fronts white to hyaline, sometimes red dotted and transversely rugose, yellow or brown and thickened at mouth;

ligules 1–4.5 mm, shorter than to as long as wide;

widest leaf blades 3.5–5 mm wide.

sheaths adaxially green-veined nearly to collar with V-shaped hyaline band extending 4–20 mm proximal to collar, somewhat loose, expanded near summit, ± wing-angled, adaxially firm, summits thin, U-shaped to rounded, sometimes shortly prolonged beyond collar;

distal ligules 4–9 mm;

blades 3–6 per fertile culm, 18–40 cm × 3–7 mm.

with 5–10 spikes, (1.5–)2–5 cm × 8–13 mm;

proximal internodes shorter than to as long as proximal spikes;

proximal bracts to 3 cm;

spikes with 5–15 ascending to spreading perigynia.

nodding, open at least proximally, pale brown, 2.5–6 cm × 7–14 mm;

proximal internode 5–12(–18) mm; 2d internode 3–11 mm;

proximal bracts scalelike, sometimes bristlelike to 3 cm.

8–15, proximal spikes well spearated, nearly globose, 9–12 × 6–8(–9) mm, base tapered, apex rounded.

pale green to pale brown, veinless or weakly 2–5-veined abaxially, 3.4–4.6 × 1.9–2.8 mm, body somewhat spongy, thickened at base, margins serrulate distally;

beak 0.7–1.4 mm, apical teeth 0.3–1 mm.

usually 15–30 per spike, ascending to reflexed, with divergent beak, pale brown; conspicuously (3–)5–8-veined abaxially, conspicuously 3–6-veined adaxially, lanceolate, flat to plano-convex, thin, 2.9–4.3 × 1.2–1.6 mm, 0.3 mm thick, margin flat, including wing 0.2 mm wide;

beak sometimes red-brown at tip, flat, ciliate-serrulate, distance from beak tip to achene 1.6–2.4 mm.

circular to elliptic-circular, 1.8–2.1 × 1.6–1.8 mm.

ovate to oblong, 1.1–1.7 × 0.6–1 mm, 0.3 mm thick.

scales hyaline or pale brown with green, 1–3-veined center, ovate, 2.2–3.5 × 1.2–1.8 mm, body 2/3 as long to almost length of perigynia, apex acuminate to short-awned.

scales white to brown with brown or green midstripe not reaching tip, oblong-lanceolate to oblong-ovate, 2–2.7 × 0.9–1.5 mm, shorter and narrower than perigynia, apex obtuse to nearly acute.

1.5–2.5 mm.

= 64.