Flora of North America species comparison

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

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

1–3, 5–30 cm × 1–2 mm.

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

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.

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.

(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.

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 0.6–0.8 mm, connectives not prolonged;

styles 0.4–0.6 mm;

stigmas 0.7–2.1 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, 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.