Flora of North America species comparison

trigonous, basally tuberous-thickened, (5–)15–40(–80) cm × 1–2.5 mm, glabrous.

trigonous, 5–50 cm × 0.4–2 mm, glabrous.

flat to V-shaped, (5–)10–30(–60) cm × (0.5–)1–3(–4) mm.

flat, 10–30 cm × 1–3 mm.

spike 1, loosely to densely ovoid to cylindric, 8–36 × 8–20 mm;

rays 3–6(–9), (5–)10–32 cm;

bracts 3–6, horizontal to ascending at 30°, V-shaped, (1–)3–15(–30) cm × 0.5–4.5 mm;

rachilla deciduous, wings 0.5–0.7 mm wide.

heads loosely globose, 10–22 mm diam.;

rays 0–6, 1–7 cm;

bracts 3–6, horizontal to slightly ascending, flat, 3–26 cm × 1–3 mm.

(5–)20–35(–65), linear to oblong (without narrowed basal portion), quadrangular; (2.2–)4–10(–18) × 0.7–1.1 mm;

floral scales persistent, 1–5, appressed, pale greenish white laterally, stramineous with reddish dots, or deep red, greenish or light brown medially, 3–6-ribbed laterally, narrowly ovate to oblong-elliptic, 2.6–3.9 × 1.6–2 mm, apex rounded to ± acute, entire, mucronulate;

distal scale with glabrous midrib and mucro 0.1–0.3(–0.5) mm;

sterile terminal scale of spikelet only 0.4–0.6 mm wide, involute, frequently uncinate.

6–20, linear-lanceoloid, compressed, 7–30 × 2–3 mm;

floral scales 8–28, stramineous to light reddish brown, laterally ribless, ovate, 2.7–3.6 × 1.6–1.8 mm.

anthers (0.3–)0.4–0.6 mm;

styles 0.4–0.5 mm;

stigmas 0.5–0.9 mm.

stamens 2;

anthers 0.5 mm, connective apex reddish, subulate, 0.1–0.2 mm;

styles 1.9–2.1 mm;

stigmas 1–1.3 mm.

light brown to reddish brown, sessile or slightly stipitate, ellipsoid, (1.8–)2–2.4 × 0.6–0.8(–0.9) mm, apex slightly apiculate, surfaces puncticulate.

brown, oblong, 1.2–1.6 × 0.6–0.9 mm, base cuneate to ± stipelike, apex obtuse, apiculate, surfaces minutely punctate.