Flora of North America species comparison

solitary or close together, trigonous, 5–40(–95) cm, glabrous.

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

(2–)3–7, broadly V-shaped, 3–20(–30) cm × 1.5–3 mm.

flat, 10–30 cm × 1–3 mm.

spikes loosely to densely ovoid to hemispheric, 7–16 mm diam.;

rachis 1–2 mm, or absent;

rays 1–2, 3–45 mm;

if rays absent, inflorescence sessile, dense, 6–20 mm diam;

bracts 2–3, horizontal to reflexed downward, broadly V-shaped, 1–15 cm × 1–3 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.

(3–)5–25(–60), linear to oblong-linear, (3–)5–9 × 1.8–2.3 mm;

floral scales 4–18, closely imbricate, chestnut brown, black, or brown, medially green or greenish brown, laterally ribless, medially 2(–3)-ribbed, distinctly 2-keeled basally, ovate to orbiculate, 1.5–2.1 × 1.4–2.2 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 0.6–0.8 mm, connectives not prolonged;

styles 0.4–0.6 mm;

stigmas 0.7–2.1 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, ellipsoid, 1.2–1.4 × 0.6–0.8 mm, network of ridges forming isodiametric or square cells, slightly stipitate, apex apiculate, surfaces minutely punctate.

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