Flora of North America species comparison

20–100 cm;

vegetative culms with few leaves clustered at apex.

17–75(–90) cm, 2–3.5 mm wide basally, 0.5 mm wide distally.

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.

sheaths tight, green, fronts hyaline;

ligules to 2.5 mm, as long as wide;

widest leaf blades 2.2–4.6 mm wide, papillose adaxially.

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.

with 5–14 spikes, 1.4–2.8 cm × 9–14.5 mm;

proximal bracts 0.7–6(–10) cm, shorter than to 2.5(–5) times as long as inflorescences;

spikes with (2–)4–24 ascending to spreading perigynia;

proximal internodes shorter than proximal spikes.

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

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.

pale green to pale brown, veinless or weakly 1–10-veined on each face, 3.3–5.6 × 1.9–2.8 mm, margins serrulate distally, base of body somewhat spongy, thickened;

beak (1–)1.4–1.8 mm, apical teeth (0.5–)1.4–1.8 mm.

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

suborbiculate, 1.8–2.8 × 1.5–2.2 mm.

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

scales pale brown to greenish hyaline, with green usually 1-veined center, ovate, 1.6–3.1 × 1.4–2.2 mm, body narrower than and 2/3 length of perigynium, apex usually awned, awn to 3.6 mm.

1.3–1.9 mm.