Flora of North America species comparison

trigonous, 20–50(–85) cm × 1–2(–4) mm, glabrous.

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

3–6(–10), 10–40(–55) cm × 1.5–4(–5) mm, V- to inversely W-shaped.

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

spike 1, densely oblong-ovoid often with small basal branches, 8–16 × 4–12(–16) mm;

rays 4–8(–11), 0.5–3.5(–8.5) cm;

bracts (3–)4–6(–10), ascending at (30–)45°, flat to broadly V-shaped, (4–)14–30(–55) cm × 1–5 mm, scabridulous along margins only;

rachilla deciduous, wings persistent, 0.2–0.3 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.

40–120, oblong-lanceoloid, subterete, 2.2–4(–4.5) × 0.8–1.6 mm;

distal spikelet spreading or ascending;

floral scales persistent, 2–5, appressed, brown to stramineous, or fuscous and lustrous, medially greenish and 1(–3)-ribbed, laterally greenish to yellowish white and 3–4-ribbed, oblong to oblong-lanceolate, 1.8–2.5 × 1–1.5 mm, subcoriacous.

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 0.3–0.5 mm;

styles 0.5–0.8 mm;

stigmas 0.6–0.9 mm.

brown, oblong-ellipsoid, 1.2–1.7 × 0.5–0.6 mm, base cuneate, apex subacute, surfaces papillose.

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