Flora of North America species comparison

8.8–28 cm.

18–50 cm.

basal sheaths dark reddish to purplish brown;

blades mostly basal, dark green, equaling or mostly exceeding culms, 1.4–4 mm wide, thick, margins smooth or scabrous.

sheath adaxially white-hyaline, summits U-shaped to rounded, occasionally prolonged to 4 mm beyond collar;

distal ligules 0.5–1.5(–2) mm;

blades 3–4(–6) per fertile culm, 11–26 cm × 2.8–4 mm.

peduncles of basal pistillate spikes filiform, arching, to 13 cm;

peduncles of terminal staminate spikes 2–6 cm;

proximal bracts short-sheathing; pistillate spikes 2–5, mostly emerging from basal nodes, proximal spikes arching, distal ones ascending, short-pedunclulate, widely separated, often with 1–2 staminate flowers at apex, obovoid to ellipsoid;

terminal staminate spikes usually with 2–5 pistillate flowers at base, 7.5–9.8 × 1.8–2.3 mm.

dense, dark brown, 1.5–3 cm × 14–20 mm;

proximal internode 1.5–3 mm; 2d internode 1–3.5 mm;

proximal bracts scalelike, usually bristlelike, shorter than inflorescences.

(4–)6–12, aggregated, individually indistinct, ovoid, 9–15 × 4.5–6.5 mm, base and apex acute to rounded.

obovoid to oblanceoloid, 3.7–6 × 1.4–1.7 mm, base tapering, pubescent with short straight hairs;

beak bent, 0.2–0.4 mm.

appressed to ascending, green, gold, or brown, conspicuously usually 7–9-veined abaxially, conspicuously 0–5-veined adaxially, veins shorter than achene, lanceolate to ovate, plano-convex, to 5.3–7.1 × 1.1–1.5 mm, 0.4–0.5 mm thick, margin flat, including wing 0.15–0.3 mm wide, ciliate-serrulate at least on distal body;

beak dark brown, sometimes gold-hyaline at tip, cylindric, unwinged, ± entire for 0.9–1.5 mm, dorsal suture inconspicuous or with conspicuous white margin, distance from beak tip to achene 2.9–4 mm.

ellipsoid, 2.5 × 1.5–1.6 mm.

ovate to obovate, 1.5–1.9 × 0.8–1.1 mm, 0.4–0.5 mm thick.

pistillate scales pale brown to reddish brown, ovate to obovate, apex retuse or truncate to obtuse, cuspidate; staminate scales dark reddish brown, ovate, apex cuspidate.

2–3.6 mm.

3, thin, flexuous, strongly papillose.

scales dark brown, red-brown, or red-gold, sometimes with green to gold midstripe, ovate, 3.6–4.7 mm, shorter than and narrower or as wide as perigynia, margin gold-hyaline, to 0.3 mm wide, apex acuminate or acute.

= 26.

= 84.