Flora of North America species comparison

trigonous, 4–25(–35) cm, glabrous.

trigonous, (5–)20–60 cm × (0.2–) 0.6–2.4 mm, glabrous.

flat, 5–20 cm × 1.5–3 mm.

(1–)3–4, V-shaped, 15–40 cm × 3–6 mm.

heads ± digitate, 12–22 mm diam.;

rays 3–6, 1–6 cm;

bracts 1–4, ± horizontal, flat, 1.5–15 cm × 1.5–3 mm.

spikes 2–5(–8), oblong to ovoid, 2–10 cm × 3–12 mm;

rays 4–8, to 11 cm;

bracts (4–)5(–7), ascending at 45°, V-shaped, (1.5–)8–30(–50) cm × 1–6 mm;

rachilla persistent, wingless (successive floral scales 0.7–0.9 mm apart).

6–12, oblong-lanceoloid, compressed, 5–10 × 2.8–3.2 mm;

floral scales 8–28, closely imbricate, stramineous to light brown or clear (marginal band bright red, spikelet thus appearing dark margined), laterally ribless, oblong to ovate, 2.5–3 × 1.6–1.9 mm.

10–30, compressed, linear to ellipsoid, 4–20 × 1.5–2.1 mm;

floral scales deciduous, (2–)6–26, laterally brown to golden brown, edges clear, medially green, 5-ribbed, outermost ribs more noticeable than others, obovate to nearly orbiculate, 1.3–1.8 × 1.2–1.8 mm, margins emarginate, apex with mucro 0.05–0.12 mm.

stamens 2(–3);

anthers 0.3 mm, connective apex reddish, subulate, 0.1–0.2 mm;

styles 0.3–0.5 mm;

stigmas 2.2–3.1 mm.

stamens 2(–3);

anthers (0.2–)0.3–0.4 mm, connective tips reddish, less than 0.1 mm;

styles less than 0.1 mm;

stigmas 0.2–0.4 mm.

brown, network of ridges forming isodiametric or square cells, sessile or stipitate, obovoid to ovoid, 1–1.2 × 0.5–0.6 mm, stipe, if present, 0.1 mm, apex obtuse, apiculate, surfaces minutely punctate.

brown, slightly stipitate, obovoid, 1.2–1.4 × 0.5–0.7 mm, apex apiculate, surfaces puncticulate.