Flora of North America species comparison

1–6(–25), trigonous to roundly trigonous, (0.5–)2–5(–9) cm × 0.2–0.4–(0.6) mm, glabrous.

trigonous, 10–50 cm × 1–3 mm.

1–6, V-shaped, 1–6 cm × 0.3–1 mm.

flat to V-shaped, 10–40 cm × 2–5 mm.

heads digitate, loosely ovoid, 3–18 × 3–26 mm;

rays (0–)1–6(–8), 2.5–20(–30) mm;

bracts 2–3(–5), horizontal to ascending at 45(–60)°, V-shaped, 2–60 × 0.3–1.2 mm.

heads digitate, 10–40 mm diam.;

rays 5–12, 1–12 cm; 2d order rays 1–3 cm;

bracts 3–5, horizontal, flat to V-shaped, 1–15 cm × 1–2 mm.

(3–)10–20(–30), greenish to reddish brown, narrowly ellipsoid to oblong, 3–11 × (0.8–)1.2–1.5 mm;

floral scales (3–)6–20(–28), laterally greenish to reddish brown, glossy, medially greenish to light reddish brown, strongly recurved, laterally ribless, medially strongly 3-ribbed, oblong-ovate, (0.8–)1–1.3 × 0.8–1(–1.2) mm, apex emarginate, cusp 0.6–1.2 mm.

(1–)2–4(–6), oblong to linear, compressed, 5–25 × 2.8–3.6 mm;

floral scales 20–60, stramineous or reddish green, laterally weakly 3-ribbed, ovate-elliptic, 2.5–3 × 1–1.8 mm.

stamens 2 or 3;

anthers oblong-ovoid, 0.1(–0.2) mm;

styles (0.2–)0.4–0.6 mm;

stigmas 0.3–0.5 mm.

stamens 3;

anthers 1–1.3 mm;

styles 0.6 mm;

stigmas 1.5 mm.

brown, oblong-obovoid, (0.5–)0.6 × (0.3–)0.4 mm, base cuneate, apex blunt, surfaces coarsely papillose.

reddish brown, sessile, ovoid, 0.7–0.8 × 0.4–0.5 mm, apex obtuse, apiculate or not, surfaces glabrous.