Flora of North America species comparison

trigonous, 20–36 cm × 0.5–1 mm.

trigonous, 50–100 cm × 5–8 mm, glabrous.

flat, 4–22 cm × 1–2 mm.

3–6, V-shaped, 20–50 cm × 5–8(–10) mm.

a single loose cluster of spikelets;

rays 0–(1–2), if present, to 4 cm;

bracts 2–3, ascending, 1–8 cm × 0.7–1 mm;

rachilla with wings 0.6 mm wide.

spikes not appearing lateral, rays 5–8, 2–7(–12) cm;

bracts 3–4, ± horizontal to ascending at 45°, V-shaped, 5–25 cm × 1.5–8 mm;

spikes 1–4, ovoid, 2–4 × 2–3 cm;

rachis 1–2.7 cm, smooth or hispidulous;

rachilla persistent, wingless or with hyaline wings scarcely 0.1 mm wide.

2–8, linear, terete, 6–20 × 0.7–1 mm;

floral scales 6–10, medially green, laterally brown, medially faintly 3-ribbed, laterally faintly 3–5-ribbed, ovate, 2.5–3 × 2 mm.

7–14, flattened, lanceoloid, 10–20 × 2–2.5 mm;

floral scales 10–30, laterally dark brown to reddish brown, medially greenish, laterally 5–9-ribbed, ovate-deltate;

anthers 3, 0.5 mm;

styles 0.5 mm;

stigmas 1.2–1.6 mm.

anthers 1 mm;

styles 0.5 mm;

stigmas 1 mm.

black, sessile, obovoid, 2 × 0.8 mm, apex scarcely apiculate, surfaces puncticulate.

brown, sessile, ellipsoid, 1.4–1.6 × 1.4–1.5 mm, apex obtuse, apiculate.