Flora of North America species comparison

basally cormlike, trigonous, (15–)30–100 cm × 0.5–3.5 mm, glabrous.

trigonous, 25–50(–80) cm × 0.8–2.6 mm, glabrous.

flat to V-shaped, 10–65 cm × 3–9 mm, adaxial surface, margins minutely scabridulous.

flat to V-shaped, 30–80 cm × 3–10 mm.

spikes densely globose to globose-ovoid, 8–17 mm wide;

rays 3–12, 2–12 cm, scaberous adaxially especially distally;

rachis 4–8 mm;

bracts (3–)4–7, ascending at 30(–45)°, flat, 5–35 cm × 2–9 mm;

rachilla persistent, wings 0.5–0.7 mm wide.

spikes ovoid, 1.5–3 × 1.5–3 cm;

rays 4–7, 1–10 cm; 2d order rays occasionally present, 0.5–2 cm, rays often not elongate, inflorescence then capitate, 2–5 cm diam.;

bracts 4–8, horizontal to ascending at 30°, flat to V-shaped, longest 6–35 cm × (1.5–)4–8 mm;

rachilla persistent, wings 0.4–0.6 mm wide.

50–100, oblong-lanceoloid, ± terete-quadrangular, (3.5–)4–7 × 1–1.4 mm;

distal spikelet spreading or ascending;

floral scales persistent, 3–5, appressed, stramineous to brownish, 4-ribbed laterally, oblong-elliptic, 3.5–4.5 × 1–1.8 mm, membranous, apex entire or emarginate with mucro to 0.3 mm.

(10–)20–60, reddish brown, flattened elliptic in cross section, linear-lanceoloid, 6–22 cm × (1–)2–3(–4) mm;

floral scales deciduous, 6–16, medially greenish, laterally reddish brown to brown, medially 3–5-ribbed, laterally 3–5-ribbed, ovate-lanceolate to ± orbiculate, 2.5–3 × 1.4–1.8 mm, apex acute to obtuse and mucronulate.

anthers 0.4–0.8 mm;

styles 0.5–0.6 mm;

stigmas 1 mm.

anthers 0.7–1.8 mm;

styles (0.3–)1.2–2.8 cm;

stigmas (1–)2–3 mm.

brown, ± stipitate, oblong, (1.5–)1.8–2.3 × 0.5–0.6(–0.7) mm (1/2 length of floral scales), apex obtuse, surfaces puncticulate.

brownish to black, stipitate or sessile, ellipsoid to obovoid or oblong, 1.3–2 × 0.75–1(–1.1) mm, apex obtuse, apiculate or not, surfaces coarsely punctate.

, perennial, cespitose, rhizomatous.