Flora of North America species comparison

trigonous, compressed, 15–75 cm × 0.5–3 mm, glabrous.

trigonous, 5–50 cm × 0.4–2 mm, glabrous.

1–3, 5–30 cm × 1–2 mm.

flat, 10–30 cm × 1–3 mm.

spikes 1(–2), ovoid, 5–23 × 9–21 mm;

rays 2–3(–4), 0–15 mm;

if rays absent, head single, compact, sessile, (12–)15–20 mm diam.;

bracts 2–3, horizontal to vertical, 2–14 cm × 0.5–3.5 mm.

heads loosely globose, 10–22 mm diam.;

rays 0–6, 1–7 cm;

bracts 3–6, horizontal to slightly ascending, flat, 3–26 cm × 1–3 mm.

1–6, oblong-lanceoloid, 5–26 × 2–3 mm;

floral scales 12–54, closely imbricate, laterally yellowish brown, medially pale brown, occasionally greenish, laterally 1-ribbed, medially 3-ribbed, distinctly 2-keeled basally, ovate, 1.8–2.6 × 1.4–1.7 mm, apex obtuse.

6–20, linear-lanceoloid, compressed, 7–30 × 2–3 mm;

floral scales 8–28, stramineous to light reddish brown, laterally ribless, ovate, 2.7–3.6 × 1.6–1.8 mm.

stamens 2;

anthers 0.4–0.5 mm, connectives not prolonged;

styles 0.3–1 mm;

stigmas 0.6–0.8(–1) mm.

stamens 2;

anthers 0.5 mm, connective apex reddish, subulate, 0.1–0.2 mm;

styles 1.9–2.1 mm;

stigmas 1–1.3 mm.

brown, network of ridges forming isodiametric or square cells, stipitate, obovoid to ellipsoid, 1.1–1.3 × (0.5–)0.6 mm, apex acute to broadly rounded, surfaces minutely punctate or finely papillose.

brown, oblong, 1.2–1.6 × 0.6–0.9 mm, base cuneate to ± stipelike, apex obtuse, apiculate, surfaces minutely punctate.