Flora of North America species comparison

20–90 cm, 1.5–3 mm wide basally, 0.9–1.1 mm wide distally.

45–90 cm;

vegetative culms few, inconspiculous, usually fewer than 12 leaves, not strikingly 3-ranked.

sheaths tight, green, fronts hyaline, yellowish and thickened at mouth;

ligules to 3 mm, as long as wide;

widest leaf blades 2.5–4.5 mm wide, sometimes papillose adaxially.

sheaths glabrous, individually indistinct Y-shaped hyaline band reaching 0–8 mm below the collar, summit U-shaped or truncate, extending 0–2 mm beyond collar, smooth;

distal ligules 2–4 mm;

blades 3–6 per fertile culm, 2.5–25 cm × 1.8–3.2(–4) mm.

with (3–)5–10 spikes, 1.5–3.5 cm × 8–15 mm;

proximal internodes equaling or shorter than proximal spikes;

proximal bracts 1–5 cm;

spikes with 8–20 ascending or spreading perigynia.

open to congested, erect to nodding, pale or golden brown, 2–4.5 cm × 7.5–19 mm;

proximal internode 3.5–12 mm; 2d internode 3–10 mm;

proximal bracts scalelike or often with bristle tips shorter than or equaling inflorescences.

3–8, distant, distinct, globose to ovoid or conic, 8–14 × 4.5–9.5 mm, base rounded to acute, apex acute, obtuse, or rounded.

pale green, pale yellow, or pale brown, 9–15-veined abaxially, 3.5–5 × 2.2–3 mm, margins serrulate distally;

beak 0.8–1.2 mm, apical teeth 0.4–0.6 mm.

15–80 on larger spikes, loosely ascending, light green, yellow-brown, or copper-brown, green or brown winged, inconspicuously 0–3(–5)-veined adaxially, 0–8-veined abaxially, 1–2 veins in winged margin, broadly elliptic to ovate, flat or concavo-convex except over achene, (4.2–)4.6–6.7(–7.1 in larger perigynia) × 2.5–4 mm, 0.5–0.7 mm thick, herbaceous, ± opaque, with achene not visible through adaxial face, margin flat, including wing 0.6–1.1 mm wide smooth;

beak tip, strongly flattened, 2–2.8 mm, serrulate-margined to apex, abaxial suture pale or copper-brown, distance from beak tip to achene 2.6–4.2 mm.

suborbiculate, 1.9–2.5 × 1.5–2 mm.

elliptic to ± orbiculate, 1.6–2.2 × 1.2–1.6 mm, 0.5–0.7 mm thick, apiculum to 0.4–1.1 mm.

scales hyaline or brown with green, 3-veined center, ovate, (2.4–)3–4.3 × (1–)1.6–3 mm, body slightly shorter to longer than perigynium and as wide, apex awned to 1.5–3.5(–4) mm.

scales pale yellowish brown or occasionally copper-brown tinged, with narrow yellow-brown midstripe, lanceolate or lance-ovate, 3.7–4.4 mm, reaching base to middle of perignyium beaks, margin whitish to brownish hyaline, apex membranaceous, curled, acuminate or awned to 0.7 mm.

2.2–2.5 mm.

(1.8–)2.2–3.6 mm.

scales acuminate-awned.

=50, 52, 54.