Flora of North America species comparison

trigonous, 1–35 cm × 0.5–1 mm, glabrous.

trigonous, 15–60 cm × 1–3 mm, glabrous.

flat, 5–20 cm × 1–2 mm.

2–6, flat to V-shaped, 6–30(–40) cm × 2–4 mm.

heads ± digitate, 8–26 mm diam.;

rays 1–6, 0.5–5 cm;

bracts 3–4, ± horizontal, flat, 3–18 cm × 1–2 mm.

spikes broadly ellipsoid, 5–45 × 10–30(–45) mm;

rays (2–)5–9, (0.3–)3–10 cm;

rachis 4–17 mm;

bracts 5–6, horizontal to ascending, V-shaped, 1.5–30 cm × 0.5–4 mm;

rachilla persistent, wings hyaline, 0.4–0.5 mm wide.

6–25, ovoid to linear-lanceoloid, compressed, 4–15 × 1–2 mm;

floral scales 8–28(–40), clear, laterally ribless, ovate, 1.4–1.6 × 0.8 mm, apex awned, awn excurved, 0.3–0.5 mm.

5–30, pale greenish white or stramineous, compressed, linear-lanceoloid, 7–35 × (1.2–)1.4–2 mm;

floral scales deciduous, 6–34, spreading or appressed, laterally greenish white, often reddish or brown speckled, medially green, laterally 3–5-ribbed, medially 3-ribbed, elliptic, (2.2–)3–4(–4.4) × (1.2–)1.8–2.2 mm, apex acute.

stamens 1–2;

anthers 0.2 mm;

styles 0.5 mm;

stigmas 0.3 mm.

anthers 0.6 mm;

styles 0.6–1.2 mm;

stigmas 1–1.4(–1.7) mm.

dark brown to black, sessile, obovoid, 0.6 × 0.4 mm, apex obtuse, apiculate, surfaces minutely punctate.

reddish brown to dark brown, stipitate, narrowly ellipsoid, 1.4–2 × 0.6–0.9 mm, apex apiculate, surfaces puncticulate.