Flora of North America species comparison

trigonous, 5–25 cm × 1–1.5 mm, glabrous.

trigonous, 20–36 cm × 0.5–1 mm.

flat, 4–22 cm × 1–2 mm.

spikes loosely ovoid, 15–25 mm wide;

rays 1–6, 2–7 cm;

bracts 2–5, 3–20 cm, ascending;

rachilla deciduous, winged.

a single loose cluster of spikelets;

rays 0–(1–2), if present, to 4 cm;

bracts 2–3, ascending, 1–8 cm × 0.7–1 mm;

rachilla with wings 0.6 mm wide.

5–30, linear, flattened, 6–22 × 1.5–2.2 mm;

floral scales ± deciduous, (4–)8–12, red, reddish purple, or reddish brown, medially green, elliptic, laterally 2–4-ribbed, 2.3–3.1 × 1.2–2 mm, apex acute to obtuse.

2–8, linear, terete, 6–20 × 0.7–1 mm;

floral scales 6–10, medially green, laterally brown, medially faintly 3-ribbed, laterally faintly 3–5-ribbed, ovate, 2.5–3 × 2 mm.

anthers 0.3–0.4 mm;

styles 1 mm;

stigmas 1.3–1.6 mm.

anthers 1 mm;

styles 0.5 mm;

stigmas 1 mm.

brown to dark purplish brown, broadly ellipsoid, 1–1.3 × 0.6–0.9 mm, surfaces puncticulate.

black, sessile, obovoid, 2 × 0.8 mm, apex scarcely apiculate, surfaces puncticulate.