Flora of North America species comparison

10–90(–135) cm.

20–60 cm, scabrous distally;

bases (remnants of old leaves) slightly or not fibrous.

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.

blades green, 1.8–5 mm wide, widest leaves 3+ mm wide, herbaceous, papillose to scabrous abaxially, papillose to scabrous adaxially.

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.

usually with both staminate and pistillate spikes, rarely only pistillate;

peduncle of staminate spike 0.7–9.7 mm;

proximal nonbasal bracts leaflike, usually shorter than inflorescences.

proximal pistillate spikes 2–3 (basal spike 0);

cauline spikes usually clearly separated, with 3–10 perigynia; staminate spikes 3.1–15.5 × 1–2.5 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.

pale green, veinless, globose to obovoid, 2.7–3.8 × 1.2–2.6 mm, as long as wide;

beak usually straight, occasionally slightly bent, pale green, 0.5–2.3 mm, weakly ciliate-serrulate, apical teeth 0.1–0.5 mm.

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

pale brown, globose to obovoid, round to obtusely trigonous in cross section, 1.4–2.3 × 1–1.4 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.

1.8–3 mm.

pistillate scales pale brown to dark reddish brown, often with broad white margins, ovate to lanceolate, 2.5–4.8 × 1.2–2 mm, shorter than to exceeding perigynia, apex obtuse to acuminate or short-awned; staminate scales elliptic to obovate, 3.1–5.2 × 0.7–2.2 mm, apex obtuse to acuminate or short-aristate.

3.

= 58.