Flora of North America species comparison

(24–)35–85 cm.

45–90 cm;

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

sheath adaxially white-hyaline, summits U-shaped to rounded;

distal ligules 2–3 mm;

blades (1–)2–4(–5) per fertile culm, flat ± to tip, 7–22 cm × (1.5–)2–3.5(–4) mm.

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.

stiffly erect, usually open, brown, 1.5–4 cm × 10–15 mm;

proximal internode (2.5–)4–10 mm; 2d internode (2.5–)3–6 mm;

proximal bracts scalelike or bristlelike, shorter than inflorescences.

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.

5–9, usually loosely aggregated, ovoid to broadly ovoid, 9–14 × 6–8 mm, base attenuate, apex rounded to tapered.

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.

ascending to ascending-spreading, gold to light brown, conspicuously 3–9-veined abaxially, conspicuously 2–5-veined adaxially, lanceolate to ovate, usually flat except over achene, 3.4–4.7(–5.2) × 1.3–2.1 mm, 0.4–0.5 mm thick, margin flat, including wing 0.2–0.6 mm wide;

beak red-brown or gold at tip, usually cylindric, unwinged, ± entire for 0.3–0.5 mm, sometimes flat, ciliate-serrulate to tip, abaxial suture often with conspicuous white margin, distance from beak tip to achene (1.2–)1.5–2 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.

elliptic to broadly ovate, 1.1–1.8 × 0.9–1.2 mm, 0.4–0.5 mm thick.

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 reddish gold to brown or greenish, often white-hyaline at tip or base, with pale or green midstripe, narrowly to broadly ovate, 3.4–5 mm, length and width less or greater than perigynia, margin not white-hyaline, apex acute to acuminate.

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.

scales acuminate-awned.

(1.8–)2.2–3.6 mm.

= 62, 64, 66, 68.

=50, 52, 54.