Flora of North America species comparison

10–90(–135) cm.

yellow-brown to dark brown at base, 2–75 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 (2.3–)3–3.9(–5.6) mm wide, smooth abaxially or sparsely antrorsely scaberulous on main veins.

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.

(0.12–)0.21–0.91(–0.99) of culm height;

peduncles of lateral spikes scaberulous;

peduncles of terminal spikes 2.9–71(–103) mm, barely exceeded by to much exceeding lateral spikes;

proximal bract sheath loose, abaxially glabrous, sheath front slightly convex, elongated 0.5–1.6 mm beyond apex;

ligules 0.8–2.9(–3.7) mm;

distal bract slightly shorter than to much exceeding terminal spike.

(2–)3–6, widely separate or distal 2–4 overlapping or rarely all congested;

lateral spikes pistillate, with (6–)18–37(–86) perigynia, 5–29 × 3.1–10.2 mm, ratio of spike length (in mm) to flower number = 0.51–0.95;

terminal spikes (5–)8–26(–30) × 1–3.3(–4.2) 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, 17–25-veined, unwrinkled, oblong-ovoid to oblong-obovoid, orbicular or suborbicular in cross section, (2.5–)2.8–3.6(–4.3) × (1.2–)1.3–1.7(–1.8) mm, (1.7–)1.9–2.5(–2.8) 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.

obovoid, 1.8–2.6 × (1–)1.2–1.4 mm, loosely enveloped by perigynia;

stipe straight 0.1–0.3(–0.4) mm;

beak straight, 0.2–0.4(–0.5) mm.

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

scales 2.4–4.7 × 1.4–2.1 mm, margins red-brown to whitish, entire, apex with awn 0.2–2.7 mm or rarely awnless.

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

scales (2.3–)2.9–4.5 × 1–1.6 mm.

0.8–1.6(–2) mm.

1.8–3.6 mm.

= 58.