Flora of North America species comparison

10–90(–135) cm.

dark purple-red to (3.4–)4–7.3 cm high at base, 8–65(–85) 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.

sheaths glabrous;

blades green, widest blades 2.4–4(–5.3) mm wide, smooth abaxially.

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.

0.094–0.94 of culm height;

peduncles of lateral spikes smooth or barely scaberulous;

peduncles of terminal spikes 1.6–22(–51) mm, usually barely exceeding lateral spikes;

proximal bract sheaths loose, glabrous abaxially, sheath front slightly concave to slightly convex, elongated 0.1–0.6(–1.1) mm beyond apex;

ligules 0.9–3.9(–6.6) mm;

distal bract slightly exceeding or rarely much exceeding terminal spike.

(3–)4–5(–6), distal 2–4 overlapping;

lateral spikes pistillate or rarely androgynous, with 3–19 perigynia, 5–26 × 4.6–9.2 mm, ratio of spike length (in mm) to flower number = 1.4–2.2;

terminal spikes 7–37(–46) × 1–2.9 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.

spirally imbricate, 52–64-veined, unwrinkled to wrinkled, narrowly ellipsoid to obovoid, obtusely triangular in cross section, (4–) 4.3–5(–5.6) × 1.5–1.9(–2.1) mm, 2.4–2.9(–3.2) times as long as wide, lustrous, base very gradually tapered, apex gradually tapered;

beak absent or straight, 0–0.2 mm.

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

broadly obovoid to obovoid, (3–)3.1–3.5(–3.7) × 1.5–1.8 mm, loosely enveloped by perigynia;

stipe straight, 0.6–0.8(–0.9) mm;

beak usually straight, occasionally bent 10–30°, 0.3–0.6 mm.

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

scales 2.1–5.3 × 1.2–2.4 mm, margins whitish, usually with red-brown speckles, entire, apex with awn 0.2–3.3 mm, rarely awnless.

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

scales 3.3–4.8 × 1.1–1.6 mm.

0.8–1.6(–2) mm.

2–2.8 mm.

= 58.