Flora of North America species comparison

to 100 cm × 2 mm, scabrous.

7–60 cm, ± smooth distally.

sheath fronts spotted red-brown or pale brown, apex truncate or short-convex, membranous or hyaline, rugose;

ligule retuse or rounded, to 2 mm, free limb to 0.2 mm;

blades 120 cm × 5 mm, longer than flowering stem.

proximal sheaths bladeless, pale brown, slender, 0.7–2.8 mm diam., not or only very sparsely papillose;

ligules 2–4.5 mm, longer than wide;

blades of vegetative culms 5–40 cm × 1.5–4 mm;

those of fertile culms green, flat, less than 10 cm.

spicate, (3–)7–10 cm × 15 mm, with 10–15 branches, the proximal branches distinctly separate; the proximal internode to 25 mm;

bracts setaceous, those subtending at least the proximal lateral branches conspicuous.

6.5–25 cm, 2–5 times longer than proximal bracts;

proximal bracts 2.5–8 cm, sheath 1–3.5 cm, blade 1–1.5 cm; pistillate spikes linear, 0.8–3 cm × 3–6.5 mm.

green to pale brown, veinless on both faces or 3-veined abaxially, body ovate or elliptic, 2–3.2 × 1.3–1.8 mm, base obtuse;

beak 0.8–1.2 mm, 1/3–1/2 length of perigynium.

3–15, the proximal loosely arranged, green to dark brown, often obscurely veined, 3.5–5 × 1.5–2.2 mm, smooth;

beak slender, cylindric, (0.4–)0.6–1.8(–2.2) mm.

red-brown, ovate, 1.2–1.4 × 1 mm, glossy.

light to dark brown, 2.2–3 × 1.2–1.5 mm.

pale brown, hyaline, awn to 3 mm.

scales purple tinged, apex broadly acute or obtuse.

= 52.

= 32.