Flora of North America species comparison

to 100 cm × (0.8–)1–1.2 mm distally.

20–90 cm × 0.9–1.2 mm distally.

blades flat, tip trigonous, channeled in cross section, to 40 cm × 1.5–6(–8) mm;

distal leaf blade much longer than sheath.

blades flat, trigonous in cross section distally, to 30 cm × 2–6 mm;

distal leaf blade much longer than sheath.

blade-bearing involucral bracts 1–3, proximally blade, often sheath black, leaflike, longest 1–12 cm.

blade-bearing involucral bracts 2–4, sometimes brown-tinged proximally, leaflike, to 7 cm.

(1–)2–10, in subumbels, patent or pendent, ovoid, 10–20 mm in flower, 20–50 mm in fruit;

peduncles 5–60 mm, smooth or scabrous;

scales lanceolate or ovate, 5–10 mm, with prominent midrib fading proximal to tip, apex ± acute;

proximal scales without lateral ribs.

3–30, in subumbels, lax, oblong-ovoid, 6–10 mm in flower, 15–30 mm in fruit;

peduncles (2–)10–60 mm, scabrous;

scales dark green to gray, pale proximally, darker distally, ovate to lanceolate, 4–6 mm, margins scarious 0–0.1 mm wide, to 12 weak lateral ribs, midrib prominent, enlarged distally, reaching tip, sometimes excurrent, apex acute.

perianth bristles 10 or more, white or pale yellow brown, 15–30 mm, smooth;

anthers 2–5 mm.

perianth bristles 10 or more, white to pale brown, 15–25 mm, smooth;

anthers 0.8–2 mm.

black, oblanceoloid, 2–5 mm.

dark brown, narrowly obovoid, 2.5–3.5 mm.