Flora of North America species comparison

trigonous, (10–)30–80(–140) cm × (0.4–)1–3(–5) mm, glabrous.

trigonous, 2–30 cm × 0.6–1.1 mm, glabrous.

V-shaped or flanged V-shaped, (5–)15–70(–90) cm × (2–)4–10(–13) mm, glabrous.

flat, 4–10 cm × 2–4 mm.

spikes 1(–5), rather densely ovoid or oblong-cylindric, (10–)25–45(–62) × 7–22 mm, 11–21 spikelets per 5 mm of rachis;

rays (3–)5–10(–17), (1–)5–12(–24) cm;

bracts (2–)4–8, ascending at 30–45°, V- or inversely W-shaped, (2–)8–40(–65) cm × (1–)2–8 mm;

rachilla deciduous, wings 0.4–0.5 mm wide.

rays 1–3, 0.2–1.5 cm; 2d order rays present in robust plants, to 5 mm;

bracts 2–3, longest erect, others spreading, 1–20 cm × 1.5–3 mm.

(10–)50–150, oblong to linear, quadrangular, (3–)4–8(–18) × (0.8–)1–1.2(–1.6) mm;

distal spikelet spreading or ascending;

floral scales (1–) 3–8, pale greenish white to golden brown, deep brown, or reddish brown, medially usually green, weakly to strongly 3(–4)-ribbed laterally, 1–3-ribbed medially, ovate to elliptic, (2–)2.6–3.2(–4) × 1.2–2 mm, apex obtuse.

3–12, narrowly ellipsoid, flattened, 3–7 × 0.9–1.2 mm;

floral scales 8–12(–16), laterally purplish brown, medially greenish yellow, 3-ribbed medially, orbiculate, 0.9–1.1 × 1 mm, apex mucronate.

anthers (0.4–)0.6–1 mm;

styles 0.4–1.6 mm;

stigmas 1–1.5 mm.

stamen 1;

anthers ellipsoid, 0.2 mm, connective not prolonged;

styles 0.3–0.4 mm;

stigmas 0.3 mm.

brown or reddish brown, sessile or nearly so, ellipsoid, 1.4–1.8(–2) × 0.6–0.8(–1) mm, apex acute to obtuse, slightly apiculate, surfaces puncticulate.

light brown, ellipsoid, 0.7–0.9 × 0.4 mm, base barely stipelike to narrowly cuneate, apex acute, surfaces glabrous.