Flora of North America species comparison

stoutly trigonous, thickened, 50–300 cm × 5–30 mm, basally indurate, glabrous.

basally cormlike, trigonous, (10–)20–80 cm × 1–3 mm, glabrous.

V-shaped, with cross ribs, 40–130 cm × 10–15 mm, margins and keel scabrid.

inversely W-shaped, 20–70 cm × 5–11 mm, adaxial surface, margins minutely scabridulous.

spikes appressed-ascending, narrowly cylindric, (2–)3–45 mm × (4–)7–10 mm;

rays (5–)9–12, 2–22(–30) cm; 2d order rays distinctly flattened, 1–10 cm; 3d order rays flattened, 0.5–3 cm;

rachis 2.5–4 cm;

bracts (6–)9–10, ascending at 45–75°, V- or inversely W-shaped, (5–)15–90 cm × 0.5–20 mm;

rachilla persistent, wings 0.2–0.4 mm wide.

spikes densely ellipsoid to obovoid, 2.5–4.3 × 1.5–3 cm;

rays 5–10, 4–20 cm, glabrous;

rachis 7–14 mm;

bracts 3–8, horizontal to ascending at 45°, flat, 5–35 cm × 2.5–6 mm;

rachilla persistent, wings 0.5 mm wide.

(4–)10–35, appressed-ascending, compressed, linear, 7–12(–15) × 0.6–1.2 mm;

floral scales deciduous, 6–20, marginally clear, laterally brown, medially green, laterally 2–3-ribbed, medially 1-ribbed, oblong-ovate, (3.2–) 3.8–4.3 × 1.2–1.7 mm, apex spreading, acute to obtuse, mucronulate.

50–90, linear-lanceoloid to linear-subulate, ± terete-quadrangular, (11–)12–13(–15) × 1.1–1.6 mm;

distal spikelet spreading or ascending;

floral scales persistent, 3–6(–8), appressed, whitish green or often yellow-tinted, sometimes reddish striate, laterally 4-ribbed, ovate-lanceolate, (3.9–)4.2–4.6(–4.8) × 1.6–2 mm.

anthers 0.7–0.9 mm, connective apex bright red, oblong, to 0.1 mm;

styles 0.8–1.3 mm;

stigmas 2–3.3 mm.

anthers 0.7–1 mm;

styles 1–1.5 mm;

stigmas 2–3 mm.

brown, sessile, narrowly ellipsoid, 1.8–2.5 × 0.8–1.3 mm, apex ± acute, not apiculate, surfaces puncticulate.

yellowish brown to brown, ± stipitate, conspicuously falcate, 3–4 times long as wide, oblong, 2.2–2.6 × 0.6–0.7 mm, apex obtuse, surfaces puncticulate.