Flora of North America species comparison

(5–)15–45 cm.

erect, 35–140 cm;

vegetative culms few, inconspicuous, usually fewer than 12 leaves, not strikingly 3-ranked, leaves clustered at apex.

sheaths adaxially white-hyaline, summits U-shaped or rounded, often prolonged to 2.5(–3) mm beyond collar;

distal ligules 1.5–2.5(–3) mm;

blades 3–5 per fertile culm, often channeled, occasionally folded, becoming trigonous toward tip, 5–20 cm × 1–2.5(–3) mm, if not folded, margins revolute.

sheaths usually with white intervenal areas abaxially, conspicuously green-veined adaxially nearly to collar, Y-shaped hyaline area at collar, adaxially firm, summits truncate and prolonged to 2 mm beyond collar, rounded, proximal sheath loose, smooth;

distal ligules 2–5.5 mm;

blades 3–7 per fertile culm, 20–65 cm × 2.2–6(–6.5) mm.

usually dense, stiff, gold to brown or brown and green, 1.5–3.5(–4) cm × 10–15 mm;

proximal internode 4–10 mm; 2d internode 2–5 mm;

proximal bracts scalelike to bristlelike, shorter than inflorescences.

erect to arching, compact to open, green, 1.5–5 cm × 5–16 mm;

proximal internode 3.5–10(–11.5) mm; 2d internode 2–8 mm;

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

(3–)4–7, distant, distinct, ovoid to broadly ovoid, 12–15 × 5.5–8 mm, base rounded to attenuate, apex acute to truncate.

4–10, overlapping to distinct, globose to ellipsoid, 7–13 × 4–7 mm, base rounded or occasionally tapered, apex obtuse to rounded.

ascending, greenish or pale gold to brown, conspicuously (0–)4–9-veined abaxially, conspicuously 0(–4)-veined adaxially, narrowly ovate to broadly ovate, flat or plano-convex, 3.8–5.2 × 1.5–2.3 mm, 0.4–0.5 mm thick, margin flat, including wing 0.3–0.5 mm wide, ciliate-serulate at least on distal body, not crinkled, without glossy metallic sheen;

beak brown to red-brown or gold with white-hyaline tip, cylindric, unwinged, ± entire for 0.6 mm, abaxial suture with conspicuous white margin, distance from beak tip to achene 1.8–2.2 mm.

15–80 on larger spikes, spreading, green distally, conspicuously 4+-veined on each face, narrowly to broadly ovate, plano-convex, 2.7–4.1 × 1.3–2.3 mm, 0.35–0.5 mm thick, margin flat, including wing 0.25–0.45 mm wide, smooth;

beak pale green at tip, flat, ciliate-serrulate, abaxial suture with conspicuous white-hyaline margin, distance from beak tip to achene 1.2–2.2 mm.

ovate to broadly ovate or, occasionally, elliptic, 1.5–2 × 0.8–1.1(–1.2) mm, 0.3–0.5 mm thick.

elliptic, 1.3–1.6 × 0.9–1.2 mm, 0.35–0.5 mm thick.

scales gold or brown, usually with pale to green midstripe, lanceolate to ovate, 3.7–5.1 mm, usually ± equaling and covering perigynia, margin white-hyaline, 0.1–0.3 mm wide, apex acute to acuminate.

scales white-hyaline, with green midstripe, ovate, 2.1–3.3 mm, much shorter by 0.7–1.6 mm and narrower than perigynia, margins hyaline or pale, sometimes involute, apex obtuse to acute.

early deciduous or short-persistent.

= 84.

= 68.