Flora of North America species comparison

3–22 cm, strongly scabrous distally;

bases (remnants of old leaves) fibrous.

20–100 cm;

vegetative culms with few leaves clustered at apex.

blades pale green, equaling or exceeding stems, 0.8–2.3 mm wide, coriaceous, glabrous abaxially, scabrous to papillose adaxially.

sheath summits U-shaped;

distal ligules 2.3–4.8 mm;

blades 3–5 per fertile culm, 10–32 cm × 1.4–3(–3.5) mm.

with both staminate and pistillate spikes;

peduncles of basal spikes stout, usually short, erect;

peduncles of staminate spikes 1.1–8.8 mm;

proximal nonbasal bracts scalelike, usually equaling or shorter than inflorescences.

arching or nodding, dense or open, green, yellow, or brown at maturity, 1.5–6 cm × 5–20 mm;

proximal internode 2–12 mm; 2d internode 2–13 mm;

proximal bracts scalelike, with bristle tip.

proximal pistillate spikes 1–4 (basal spikes 1–2);

cauline spikes overlapping or somewhat separated, with 5–15 perigynia; staminate spikes 6.9–16.9 × 1.4–2 mm.

3–10, distinct, ellipsoid, 7–16 × 3–9(–13) mm, base acute to short-attenuate, apex acute to rounded.

pale green to yellowish brown, veinless or faintly to 6-veined near base, globose to obovoid or ellipsoid, round in cross section, 2.7–4 × 1.5–2 mm;

beak straight, pale green, not strongly 2-edged, 0.4–1 mm, ciliate-serrulate, apical teeth 0.2 mm.

ascending or rarely widely spreading, golden brown, conspicuously 5-veined on each face or fewer adaxially, winged to base, lanceolate, flat except over achene, 4.2–6.8 × 1.2–2 mm, length at least 3 times width, 0.35–0.55 mm thick, margin flat, including wing 0.2–0.6 mm wide;

beak pale to golden-brown at tip, flattish, ciliate-serrulate, abaxial suture with white or golden brown hyaline margin, distance from beak tip to achene 2.2–4.8 mm.

brown, globose to obovoid, round in cross section, 1.6–2.8 × 1.5–1.9 mm.

ovate or elliptic, 1.3–1.7 × 0.7–0.9 mm, 0.3–0.4 mm thick.

pistillate scales pale reddish brown with broad white margins, ovate, 3–4.3 × 1.5–1.8 mm, equaling perigynia, apex acute or cuspidate to acuminate; staminate scales lanceolate, 4.8–6.8 × 1.5–1.6 mm, apex acute to acuminate.

2–3.1 mm.

3.

scales hyaline brown, occasionally with green or gold midstripe, lanceolate, 3.4–4 mm, shorter and narrower than perigynia, apex acuminate.