Flora of North America species comparison

roundly trigonous, 200–350 cm × 15–50 mm, glabrous.

trigonous, 20–36 cm × 0.5–1 mm.

bladeless.

flat, 4–22 cm × 1–2 mm.

spikes loosely cylindric, 15–40 × 8–16 mm;

rays 5–8, ascending to erect, stiff,20–30 cm; 2d order rays 5–15 cm;

bracts 10–12, ascending at 30–60°, flat, (8–) 20–45 cm × 4–12 mm; 2d order bracts (5–)15–25 cm × 1.5–5 mm;

rachilla persistent, separating laterally, remaining firmly attached basally, wings 0.3–0.4 mm wide.

a single loose cluster of spikelets;

rays 0–(1–2), if present, to 4 cm;

bracts 2–3, ascending, 1–8 cm × 0.7–1 mm;

rachilla with wings 0.6 mm wide.

(15–)50–80, slightly compressed, linear, ± quadrangular, 5–12 × 0.6–1.4 mm;

floral scales 8–20, appressed, reddish beside 5-ribbed green medial part, white to hyaline near margins, ovate, 1.8–2.2 × 1.2–1.5 mm, apex acute to obtuse.

2–8, linear, terete, 6–20 × 0.7–1 mm;

floral scales 6–10, medially green, laterally brown, medially faintly 3-ribbed, laterally faintly 3–5-ribbed, ovate, 2.5–3 × 2 mm.

anthers 0.7–1 mm (connective prolonged beyond anther as red subulate appendage 0.2–0.5 mm, its apex sometimes setose);

styles 0.2–0.5 mm;

stigmas (0.8–)1.2–1.8 mm.

anthers 1 mm;

styles 0.5 mm;

stigmas 1 mm.

pale brown, sessile, oblong, 0.9–1 × 0.4–0.5 mm, apex scarcely apiculate, surfaces puncticulate.

black, sessile, obovoid, 2 × 0.8 mm, apex scarcely apiculate, surfaces puncticulate.