Flora of North America species comparison

roundly trigonous, 3–25(–30) cm × 0.3–1.4 mm, glabrous.

roundly trigonous, (10–)20–30(–45) cm × 0.4–1.2 mm, distal 1/2 glabrous or infrequently scabridulous.

1–3, V-shaped, 1–8 cm × 1–2 mm.

2–6(–8), V-shaped or flat, 8–12(–16) cm × 1–2(–4) mm.

spike 1, loosely ovoid, compressed, 7–14 × 9–14 mm;

rays 1–4, to 2(–3) cm;

bracts 2–3, horizontal to ascending at 30(–45)°, V-shaped to flat, 1–12 cm × 0.5–1.5 mm.

heads hemispheric, 7–12(–15) mm diam.;

rays 1–3(–5), 0.5–2 cm;

bracts 3–6, longest erect to ascending, flat to V-shaped, (1.5–)3–12(–25) cm × 1–2.5(–3.5) mm.

3–5(–8), flattened, oblong to oblong-lanceoloid, 8–18 × 2–2.6(–3) mm;

floral scales (6–)10–26(–32), closely imbricate, laterally light to dark brown, medially light brown, laterally ribless, medially 2–3-ribbed, 2-keeled, oblong to ovate, 1.9–2.7 × 1.8–2.3 mm, apex obtuse.

(15–)25–50(–75), ovoid, compressed, 4–7 × 2–3 mm;

floral scales 8–20(–35), laterally yellowish, yellowish green, or light reddish brown, medially light brown or greenish brown, 2-keeled, subtly 1-ribbed, ovate-lanceolate, 1–2 × 1–1.4 mm, apex acute, mucronate, straight to excurved, glabrous or sparsely scabridulous.

stamens 2–3;

anthers 0.4–0.5 mm, connective not prolonged;

styles 0.6–1 mm;

stigmas 1–1.5 mm.

stamen 1;

anthers 0.5 mm;

styles 0.8–1.1 mm;

stigmas 0.5 mm.

black, network of ridges forming isodiametric or square cells, sessile, obovoid to ovoid, 1–1.3(–1.5) × (0.6–)0.8 mm, apex apiculate, surfaces minutely punctate.

brown, stipitate, broadly ellipsoid, abruptly contracted to base, 0.8–1.1 × 0.3–0.4 mm, stipe 0.1 mm, apex acute, tapering to slender beak formed of persistent style base, surfaces papillose.