Flora of North America species comparison

trigonous, (15–) 20–40(–65) cm × 0.5–1 mm, glabrous.

trigonous, (4–)14–45 cm × 1–2 mm, glabrous.

V-shaped, (10–)20–40 cm × 0.8–2.8(–3) mm, glabrous.

yellow-green, flat, 18–44 cm × 3–4.5 mm.

spike 1, densely oblong-cylindric, (15–)25–35(–40) × 12–18(–22) mm, (spikelets loosely spaced, 7–9 per 5 mm of rachis);

rays (5–)6–8(–11), 0.5–4(–7.5) cm;

bracts (4–)5–7(–8), ascending at 30º, (4–)10–30(–35) cm × (1–)2–4(–7) mm;

rachilla deciduous, wings persistent, 0.4–0.5 mm wide.

spikes densely to loosely globose to ovoid, 10–20 mm wide;

rays (3–)5–9(–14), 1–15(–26) cm;

rachis 3–6(–9) mm;

bracts (4–)6–9(–11), horizontal to ascending at 45°, flat, 1–30 cm × 0.5–4 mm;

rachilla deciduous, wings persistent, 0.3–0.5(–0.8) mm wide.

(20–)40–80(–100), linear, ± cylindric, scarcely compressed, (4.5–)6–9(–11) × (0.5–) 0.6–0.7(–1) mm;

floral scales persistent, (1–)2–3(–4), appressed, medially green, laterally light brown to tawny or bronze, medially (1–)3-ribbed, laterally 3-ribbed, oblong, (2.6–)2.8–3.2(–3.4) × (1–)1.2(–1.4) mm, apex acute, mucronulate, mucro to 0.1(–0.2) mm.

(10–)30–50, oblong to lanceoloid, quadrangular to subterete, compressed, 4–8 × 1–1.3 mm;

distal spikelet spreading or ascending;

floral scales persistent, (1–)2–4(–6), appressed, whitish with red speckles, laterally 2–4-ribbed, ovate, 2.3–3.6 × 1.8–2.2 mm.

anthers 0.6–0.8 mm;

styles (0.4–)0.6–1(–1.2) mm;

stigmas persistent on achenes, prominently exserted from floral scales, (1.5–)2–3(–4) mm.

anthers 0.5 mm;

styles 0.6–1.3 mm;

stigmas 1.2–2.6 mm.

brown to reddish brown, stipitate, narrowly oblong, 1.8–2.1 × (0.4–)0.5(–0.7) mm, stipe 0.1–0.2 × 0.1–0.2 mm, apex apiculate, acute, surfaces puncticulate.

reddish brown to nearly black, sessile, oblong, ellipsoid, 2–2.4 × 0.4–0.5(–0.7) mm, apex ± truncate-emarginate, apiculate, surfaces puncticulate.