Flora of North America species comparison

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

trigonous, 10–50 cm × 1–3 mm.

flat to V-shaped, 10–40 cm × 2–5 mm.

spikes loosely ovoid, 15–25 mm wide;

rays 1–6, 2–7 cm;

bracts 2–5, 3–20 cm, ascending;

rachilla deciduous, winged.

heads digitate, 10–40 mm diam.;

rays 5–12, 1–12 cm; 2d order rays 1–3 cm;

bracts 3–5, horizontal, flat to V-shaped, 1–15 cm × 1–2 mm.

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.

(1–)2–4(–6), oblong to linear, compressed, 5–25 × 2.8–3.6 mm;

floral scales 20–60, stramineous or reddish green, laterally weakly 3-ribbed, ovate-elliptic, 2.5–3 × 1–1.8 mm.

anthers 0.3–0.4 mm;

styles 1 mm;

stigmas 1.3–1.6 mm.

stamens 3;

anthers 1–1.3 mm;

styles 0.6 mm;

stigmas 1.5 mm.

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

reddish brown, sessile, ovoid, 0.7–0.8 × 0.4–0.5 mm, apex obtuse, apiculate or not, surfaces glabrous.