Flora of North America species comparison

10–90(–135) cm.

straight, 10–50 cm, tallest ones 25–50 cm.

3–6 per culm;

sheaths tight, inner band hyaline, 1.8–2.5 cm, apex concave, glabrous;

ligules 0.6–2.5(–4.5) mm, rounded to ± acute;

blades plicate, 5–40 cm × 0.7–3.3(–3.8) mm, widest leaf 1–3.3(–3.8) mm wide.

of flowering stems usually shorter than culms, 5–20 cm × 1.5–2.9 mm;

ligules on distal cauline leaves truncate or rounded.

0.7–7.8 cm;

spikes (2–)3–8;

lateral spikes pistillate often with few staminate flowers proximally, 3–15.5 mm, sessile, staminate portion 7-flowered, to 8.2 mm, pistillate portion 3–32-flowered, 2.5–11 mm;

basal 2 spikes 1.7–42 mm apart;

terminal spike gynecandrous, 5–24 mm, staminate portion 2–17-flowered, 2–16.5 × 0.9–2 mm, pistillate portion 4–26-flowered, 2.6–9 × 4.9–9.1 mm.

peduncles of terminal staminate spikes 0.5–8 mm, 0.2–0.5 length of staminate spikes;

bracts to 20 cm × 1.1–2.9 mm, 1.5–4 times as long as inflorescences;

inner band of sheaths concave or truncate.

proximal pistillate spikes (1–)2–5, approximate, subsessile or short-pedunculate, globose to elliptic, 8.5–19.9 × 4.1–9.8 mm;

terminal staminate spikes pedunculate, 12–21 × 1.3–2.7 mm.

spreading to reflexed, castaneous to dark brown, 2–14-veined abaxially, 0–12-veined adaxially over achene, lanceolate to ovate, (2.65–)2.9–4.75 × 0.8–2.1 mm, (1.7–)1.8–3.2(–3.6) times as long as wide;

beak (0.85–)0.95–2 mm, (0.4–)0.45–0.86 length of body, serrulate, teeth (0–)0.15–0.5 mm.

reflexed, yellowish green, 3.5–4.8 × 1.1–1.7 mm, apex gradually narrowed;

beak 1.4–2.5 mm, forming an angle of 13–48° with body, smooth.

ovate-lanceolate to rhombic-ovate, 1.3–2.1 × 0.8–1.55 mm.

1.2–1.5 × 1–1.2 mm.

scales ovate, (1.4–)2.1–3.1 × 0.7–2.3 mm, apex acute to sometimes obtuse.

scales ovate-lanceolate to ovate, 1.3–3.8 × 0.8–1.7 mm, base clavate, apex acute.

0.8–1.6(–2) mm.

1.1–2.9 mm.

pistillate scales yellowish green, inconspicuous among perigynia, 1.7–2.6 × 0.8–1.2 mm;

staminate scales yellowish green, ovate, 2.9–4.4 × 0.8–1.6 mm, apex obtuse or acute to acuminate.

= 58.

= 64.