Flora of North America species comparison

dark maroon at base; flowering stems 0.5–1.1 mm thick, 20–90 cm, much longer than leaves at maturity, glabrous, but often scabrous within inflorescence.

10–110 cm.

sheaths glabrous or short-pubescent, basal few bladeless and maroon, others grading from maroon to green on back, pale brown-hyaline, red dotted and sometimes pubescent near apex;

blades flat, 3–9 mm wide, glabrous, minutely scabrous on margins distally.

3–5 per culm;

sheaths tight, inner band hyaline, 3.5–24 cm, apex concave, glabrous;

ligules rounded to obtuse, 0.5–3.7 mm;

blades plicate, 8–60 cm × 0.4–4(–4.5) mm, widest leaf 0.8–4(–4.5) mm wide.

peduncles of lateral spikes slender, to 40 mm, equaling spikes or usually somewhat shorter, scabrous;

peduncle of terminal spike to 13 mm, glabrous or scabrous;

proximal bracts shorter than inflorescences;

sheaths 20–25 mm;

blades 3–4 mm wide.

0.8–5.5 cm;

spikes 2–8;

lateral spikes pistillate often with a few staminate flowers proximally, 3.1–13.1 mm, sessile, staminate portion 10-flowered, to 6.5 mm, pistillate portion 3–40-flowered, 2.5–12 mm;

basal 2 spikes 1.5–18 mm apart;

terminal spike gynecandrous, 4.8–23.7 mm, staminate portion 2–21-flowered, 1.8–13.5 × 0.8–1.3 mm, pistillate portion 4–38-flowered, 3–11 × 4.4–7.5 mm.

green, usually red dotted, 2-ribbed and finely 8–12-veined, veins more obvious near base, ellipsoid to oblong-ovoid, loosely enveloping achenes, 2–3.7 × 1.3–1.6 mm, membranous, acute at base, tapering gradually to acute beakless apex, glabrous.

spreading to reflexed, green, 6–13-veined abaxially, (0–)1–12-veined adaxially over achene, broadly ovate to suborbicular, cuneate or concavely tapered from widest point to beak, 1.9–3.8 × (1.3–)2.1–3 mm, 1.1–1.7(–1.9) times as long as wide;

beak 0.45–1.25 mm, 0.23–0.5(–0.63) length of body, serrulate, teeth 0.15–0.45 mm.

substipitate, 1.2–2.6 × 1–1.2 mm.

deltate to rhombic-orbiculate, 1–1.9 × 1–1.7 mm.

spikes 2–5, 1 per node, well separated, drooping at maturity, pistillate with 10–45 perigynia attached 2 mm apart, linear, 10–70 × 2–3.5 mm.

spike gynecandrous, 10–60 × 1–3 mm.

scales white-hyaline tinged with chestnut, broad green midrib often red dotted, sometimes scabrous, ovate to oblong, shorter than mature perigynia, apex rounded or cuspidate with ciliate awn less than 1 mm, otherwise glabrous.

scales ovate to ± suborbicular, 1.2–2.4 × 1.2–2 mm, apex obtuse to acute.

scales ovate-lanceolate to ovate, 1.3–3.5 × 0.8–1.4 mm, base clavate, apex acute to obtuse.

0.6–1.5(–1.8) mm.

= 50, 52, 54.