Flora of North America species comparison

20–90 cm, 1.5–3 mm wide basally, 0.9–1.1 mm wide distally.

40–100 cm;

vegetative culms conspicuous, with spreading leaf blades evenly along stem.

sheaths tight, green, fronts hyaline, yellowish and thickened at mouth;

ligules to 3 mm, as long as wide;

widest leaf blades 2.5–4.5 mm wide, sometimes papillose adaxially.

sheaths adaxially green-veined to within 3 mm of collar, adaxially firm, summits usually brown tinged, U- or V-shaped, thick;

distal ligules to 2 mm;

blades 7–12 per fertile culm, 12–25 cm × 3–5 mm.

with (3–)5–10 spikes, 1.5–3.5 cm × 8–15 mm;

proximal internodes equaling or shorter than proximal spikes;

proximal bracts 1–5 cm;

spikes with 8–20 ascending or spreading perigynia.

open at least proximally, brown, (4–)5–9 cm × 10–20 mm;

proximal internode (4–)5–15 mm; 2d internode (3–)5–11 mm;

proximal bracts scalelike.

5–12, distant, distinct, lanceoloid, 12–28 × 3.5–7 mm, bases tapered, apex acute.

pale green, pale yellow, or pale brown, 9–15-veined abaxially, 3.5–5 × 2.2–3 mm, margins serrulate distally;

beak 0.8–1.2 mm, apical teeth 0.4–0.6 mm.

appressed-erect, pale brown, conspicuously 5–7-veined abaxially, conspicuously 3–7-veined adaxially, lanceolate, flat to plano-convex, 6–9 × (1.5–) 2–2.5 mm, 0.3 mm thick, margin flat, including wing 0.2–0.4 mm wide;

beak tip flat, ciliate-serrulate, abaxial suture inconspicuous, distance from beak tip to achene 3.1–4.5 mm.

suborbiculate, 1.9–2.5 × 1.5–2 mm.

elongate-oblong, 2–2.7 × 0.8–0.9 mm, 0.3 mm thick.

scales hyaline or brown with green, 3-veined center, ovate, (2.4–)3–4.3 × (1–)1.6–3 mm, body slightly shorter to longer than perigynium and as wide, apex awned to 1.5–3.5(–4) mm.

scales white-hyaline or pale brown with pale brown midstripe, oblong-ovate, 4–5 mm, 1/2 length of and narrower than perigynia, apex acute.

2.2–2.5 mm.

= 80.