Flora of North America species comparison

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

trigonous, (12–)30–80(–90) cm × 0.7–1.7 mm, glabrous or nearly so.

1–3, 5–30 cm × 1–2 mm.

flat to V-shaped, 20–45 cm × 2–4 mm, margins and keel minutely scabridulous.

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.

spike 1, loosely ovoid to ovoid-ellipsoid, (1.5–)2.5–7 × (1–)1.5–3.5 cm;

rays 1–4, 1–15 cm;

rachis 1–2 cm;

bracts 2–4, oblique or ascending, 1–15(–24) cm × 0.4–3.5 mm, keel, margins scabrid;

rachilla ± deciduous, wingless.

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–)8–40, linear, compressed-quadrangular, 8–18 × (2.4–)2.8–4 mm;

floral scales deciduous, (2–)4–12, laterally light brown to reddish brown, medially green or light brown, laterally 2–3-ribbed, oblong-ovate, 1.6–2.6 × (1.5–)1.6–2.2(–2.4) mm, apex obtuse, sometimes mucronulate, medially glabrous.

stamens 2;

anthers 0.4–0.5 mm, connectives not prolonged;

styles 0.3–1 mm;

stigmas 0.6–0.8(–1) mm.

anthers 0.4–0.6 mm;

styles 0.3–0.6 mm;

stigmas 0.6–1 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.

brownish, stipitate, ellipsoid, 1.6–2 × (0.7–)0.9–1 mm, stipe whitish, 0.1–0.2 mm, apex obtuse, slightly apiculate, surfaces papillose.