Flora of North America species comparison

15–38 cm.

erect or lax, 5–35(–40) cm.

sheath summits white-hyaline, green ribbed, U-shaped, occasionally prolonged to 4 mm distal to collar;

distal ligules 1–3(–3.5) mm;

blades 2–4 per fertile culm, 4.5–18 cm × 1.5–2.5 mm.

sheaths and bases from previous year’s leaves usually absent;

ligules rounded or acute;

blades glabrous adaxially.

nodding, dense, dark or medium brown, 1–1.2 cm × 5.5–10 mm;

proximal internode 1.3–3 mm; 2d internode 0.6–1.5 mm;

proximal bracts scalelike to bristlelike.

unispicate (very rarely with short, sessile lateral spike of same sex), mostly erect, ellipsoid;

primary inflorescence bracts leaflike, rarely scalelike, shorter or longer than inflorescences.

3–6, usually individually indistinct, ovoid to broadly ovoid, 4.5–6.5 × 2.5–5.5 mm, base and apex acute to rounded;

terminal spike without conspicuous staminate base.

ascending-spreading to spreading, gold to dark brown, conspicuously 0–7-veined abaxially, conspicuously 0–4-veined adaxially, ovate, plano-convex, 2.6–3.2 × 0.9–1.3 mm, 0.5–0.65 mm thick, margin unwinged, pithlike tissue usually present in proximal perigynia walls;

beak medium or dark brown at tip, often with white-hyaline, cylindric to somewhat flat, abaxial suture with conspicuous white margin, distance from beak tip to achene 1.2–1.6 mm, entire.

red-brown, ovate to lanceolate, to 4 × 1.6 mm, as wide as subtending scale, apex tapering or rounded, distal 3/4 hirsute with white hairs;

beak 0.1 mm, orifice circular;

rachilla absent.

ovate to obovate, 1.2–1.5 × 0.8–1 mm, 0.4–0.5 mm thick.

1–2 × 0.6–1.2, tightly enveloped by perigynia, occupying full width and at least 3/4 length of perigynia.

scales dark brown, usually with pale or green midstripe, ovate, 1.5–2.5(–3.5) mm, usually shorter, narrower than perigynia, margin occasionally hyaline gold, to 0.4 mm wide, apex obtuse or acute.

red-brown to purple, ovate to lanceolate, to 3.5 × 1.5 mm, shorter than, equal to, or longer than perigynia, margins hyaline, narrow to broad, central midrib extending midway or to scale apex, apex acute to obtuse.

= 64

= 62.