Flora of North America species comparison

trigonous, 10–50 cm × 1–3 mm.

roundly trigonous to terete, 30–80 cm × 1–1.6 mm, glabrous.

flat to V-shaped, 10–40 cm × 2–5 mm.

1–6, 10–40 cm, glabrous or essentially so.

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.

heads ovoid to pyramidal, 9–15 mm diam.;

rays 0 or 3–6, 0.5–4 cm, glabrous;

bracts 3–4, longest erect, appearing as continuation of culm, others horizontal to ascending, 4–17 cm × 1.5–4 mm.

(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.

25–60, reddish with contrasting yellowish or greenish edges, oblong-lanceoloid, strongly compressed, 5–6(–15) × 1.5–2.5 mm;

floral scales 10–22, laterally reddish, medially yellowish green, 2-keeled, laterally strongly 1-ribbed on each side, proximally grooved, ovate-elliptic, 1.4–2.2 × 0.8–1.5 mm, apex acute, apically scabridulous (sometimes glabrous).

stamens 3;

anthers 1–1.3 mm;

styles 0.6 mm;

stigmas 1.5 mm.

stamen 1;

anthers 0.6–1 mm;

styles 0.3–0.5 mm;

stigmas 0.3–0.6 mm.

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

reddish brown, stipitate, ovoid-ellipsoid, 0.8–0.9 × 0.3–0.4 mm, stipe 0.1–0.2 mm, apex acute to acuminate, surfaces reticulate or subtly rugulose.