Flora of North America species comparison

trigonous, 30–150 cm × 1–5(–8) mm.

trigonous, 7–30 cm × 0.5–1 mm, glabrous.

bladeless.

V-shaped to flat, 5–20 cm × 1–2.5 mm.

heads digitate, 15–30(–36) mm diam.;

rays (14–)20–22, (2–)5–12(–20) cm; 2d order rays 0.3–3(–4) cm; 3d order rays sometimes present, 0.3–2.5 cm;

bracts (4–)18–22, ± horizontal, flat, 15–27 cm × (1.5–)8–12 mm.

spike hemispheric, 7–20 mm wide;

rays absent;

rachis 1–3 mm;

bracts 2–3, reflexed, flat, 5–12 cm × 1–2 mm;

rachilla deciduous, wings 0.2 mm wide.

8–20, ovoid to linear-lanceoloid, compressed, 5–25 × 1.5–2 mm;

floral scales 8–28, laterally whitish or light brown, ± hyaline, medially light brown, laterally ribless, medially 3-ribbed, 2-keeled in proximal 30–60%, deltate-ovate, 1.6–2.4 × (1–)1.2–1.5(–1.7) mm, apex acute.

30–50, compressed, oblong-lanceoloid, 4–10 × 1.7–2.3 mm;

floral scales deciduous, 5–12, dark reddish brown, laterally 3–5-ribbed, ovate, 1.5–2.2 × 1–1.6 mm, apex with mucro 0.1–0.2 mm.

stamens 3;

anthers 0.7–1 mm;

styles 0.5–1 mm;

stigmas 0.6–1 mm.

anthers 0.4–0.6 mm;

styles 0.4–0.6 mm;

stigmas 1–2 mm.

brown, sessile or stipitate, broadly ellipsoid, 0.6–0.8 × 0.4–0.6 mm, stipe if present to 0.1 mm, apex obtuse, apiculate, surfaces puncticulate.

black, sessile, narrowly ellipsoid, 1–1.2 × 0.5–0.6 mm, apex obtuse, apiculate, glabrous, puncticulate, or papillose.